Top Circuits Page 103
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This is a circuit of Voltage-to-Pulse Duration Converter. This circuit is used to convert voltage into pulse duration by combining a timer IC and an OP Amp..
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This is a Voltage Controlled Oscillator? (VCO) circuit. This circuit is based on Hartley oscillator. The frequency depend on the value of C1 and L1. The...
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Voltage Converter Circuit diagram for 3 volts to 5 volts (3v to 5v) using IC (CMOS Monolithic) MAX660 and MAX667-a positive voltage regulator..
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Voltage-to-frequency converter (VFC)? circuit is shown in the schematic diagram below. The circuit employs 555 IC as the core of its function. This circuit ...
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Voltage inverter circuit design electronic project using few electronic components..
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This circuit consists of a UJT oscillator in which the timing charge capacitor C2 is linearly dependent on the input sigoal voltage. The charging current is set by the voltage across resistor R5. which is accurately controlled by the amplifier..
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This voltage to frequency converter circuit has an oscillator that is voltage controlled and has a small, 0.5% deviation. IC1 function as a multivibrator a...
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Normally we often encountered the frequency meter can be used in speed sensor, tachometer, measurement or signal recurring. This frequency to voltage converter (FVC) can be used to change the voltage into a digital or analog tachometer. Circuit that consists....
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Below is a comparator circuit which is can measure with step of 1 volt, the voltage of car battery. The indication of voltage is done by comparison of? ...
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Water level controller circuit described here control the water level inside a tank. There two modes available with this water level controller circuit. The...
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This White LED lights illuminates your porch with cool white light. The circuit is too simple and energy saving design. Its current consumption is practica...
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Field strength meter is extremely useful when working with RF devices. It can be used to quickly diagnose whether a transmitter circuit is working, and can be used to detect RF signals in the environment. The simplest field strength meter could be built with....
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Incandescent lamp has been used to reduce harmonic distortion in sine oscillator circuit. The nonlinear resistance characteristic of the lamp filament help the...
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The excellent high input impedance, high slew rate, and high voltage qualities of CA3140 op-amp make it suitable for Wien-bridge sine wave oscillator. The basic circuit for Wien-bridge sine wave oscillator is shown in the figure below (the upper part). You....
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This circuit is a wireless car alarm system that is built using two circuit modules, namely modules of transmitter and receiver modules. This circuit works on FM radio waves. Car alarms can be used on vehicles that have a 6-12VDC power supply. You can use....
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Tom Au-Yeung and Wilson Tang, Maxim Integrated Products EDN You can make a wireless temps system with two ICs You can use a local temperature sensor and an ASK (amplitude-shift-keying) transmitter/receiver pair to design a simple wireless....
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This high-performance video-camera link transmits signals from your video camera to your VCR, or from your VCR to TVs throughout your home. The first stage of the rf chain is a crystal-controlled oscillator, Q1, with a frequency of 60 to 65 MHz, which is....
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This is Xenon Strobe Light circuit, model continual use a tube Xenon at give many brightnesses. By can fine blink fast or slow get , with VR1. By have SCR...
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This circuit is used for remote photographic flash units that flash at the same time as the flash attached to the camera.This circuit is designed to the trigger cord or hot shoe connection of a commercial portable flash unit and triggers the unit from the....
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Video recorder, DVD player and TV game, have component video output. The component video signal is like RGB video signal, but it cannot connect to RGB monitor...
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ZXLD1100 is a PFM flyback DC to DC boost converter that work in discontinuos mode. The following circuit diagram show you about setting 4 LED Driver for Handset LCD Backlight using this device. The ZXLD1100 designed for driving 2,3,4 series connected white....
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Audio frequency-shift keying (AFSK) is a modulation technique by which digital data is represented by changes in the frequency (pitch) of an audio tone, yielding an encoded signal suitable for transmission via radio or telephone. Normally, the transmitted....
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This circuit is a circuit diagram to convert the speaker into the microphone. In principle When sound waves fall on the diaphragm of a speaker, there will be fluctuations in the coil and the induced voltage will be no small proportion. This induced voltage....
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Depending on its design an electric guitar may have anything from one to six pickup elements. Classic (acoustic) guitars could also benefit from one or more retro- ¬tted pickups. Each pickup has a specific sound depending on the type of sensor and the....
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The key to using a soundcard successfully in digital signal processing or digital radio applications lies principally in the characteristics of the soundcard itself. This applies in particular to SDR (software de ¬ ned radio) programs that turn your PC into....
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Nowadays a lot of intercom units are equipped with video cameras so that you can see as well as hear who is at the door. Unfortunately, the camera lens is perfectly placed to serve as a sort of support point for people during the conversation, with the....
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Magnetic pick-ups in musical instruments have a relatively high output impedance. This can result in a reduction in treble response when connected via a long cable run or to equipment with a low input impedance. This preamplifier provides a high input....
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Do you suspect your broadband speed (DSL) is slower than it should be It could be as simple as incorrect polarity in your phone wall socket. Build this very cheap, very simple device to find out whether you need to change your wiring! It might not seem that....
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This circuit breaks an input voltage signal down into its components: (1) the absolute value and (2) the polarity or sign` (+ or ). It will handle direct input voltages as well as alternating voltages up to several kHz. With a supply voltage of ±9 V, the....
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The fan runs constantly in many PCs, which may not even be necessary. A simple controller circuit can regulate the fan speed according to demand. This not only saves energy, it also reduces irritation from the fan noise. Only three components are needed to....
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This circuit is a frequency meter, low cost. It covers region 1HZ until 1MHZ. The IC1 schmitt trigger that it regulates the signal of entry and him changes in reasonable level suitable for the IC2-3-4. With the tenth pulse in the entry of IC2/1, is produced....
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The incoming ring is detected by transistor T1 and components wired around it. In absence of ringing voltage, transistor T1 is cut off while transistor T2 is forward biased as resistor R2 is returned to the positive supply rails. As a result collector of....
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If you want to create the 100 watt OCL audio amplifier circuit. I want you to consider this circuit as one. It uses STK4231 IC products to create a simple, small and best economical. The STK4231 is Hybrid IC of Sanyo, in the family of STK4201II. Can provide....
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April 2006 was the twentieth anniversary of the Chernobyl reactor accident. In the days following the incident winds deposited much of the reactor contents across central Europe, Scandinavia and the UK. A large area surrounding the reactor is still off....
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Many of you will have an old mobile phone gathering dust. The circuit shown in this article gives the old mobile a new lease of life, enabling it to switch an electrical appliance on and off in or around the home. The circuit will even talk to you on in....
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Remote controlled light switches are becoming more and more common. DIY stores have inexpensive sets consisting of several light switches and a remote control unit. It`s then easy to control everything from your armchair. But how can you control the lighting....
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A trip unit is electrically connected in parallel with a current limiting polymer element in series with circuit breaker contacts to function as a shunt resistance for the polymer element. It becomes energized by transition of the polymer element to its high....
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In this issue, we feature articles on a variety of measurement-and sensor-related embedded design projects. I encourage you to try similar projects and share your results with our editors. Starting on page 14, Petre Tzvetanov Petrov describes a multilevel....
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555-Timer has vast application in electronics. In my recent post I showed you other forms in which a 555-Timer could be applied. Today, we shall use 555-Timer in a Monostable Multivibrator configuration to trigger a Driver (Transistor) in energizing a relay....
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An analog VU meter is often included in the audio equipment to display signal levels in volume units. Analog VU meters with peak LED Another Thumbnail magnetoelectric VU meter response of a VU meter (black line) compared with the instantaneous input level....
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Digital scoreboard circuit functions to display values from 0 to 9 on the 7 segment display. 7 segments using a type of common anode. 7 segment driver IC using a 74LS47 or 74LS247. On the digital scoreboard circuitry uses a 555 timer ic, serves to produce a....
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Ultrasonic sensor circuit is a sensor that consists of transmitter and receiver. This circuit is useful for remote control. The frequency of sound produced by a series of Ultrasonic Sensor is above 20 KHz which is between 40 KHz 50 KHz. Used power supply....
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In this article we make digital thermometer on the Arduino Uno. In this Digital Thermometer temperature sensor used is LM35DZ. In other applications you can replace with LM35 temperature sensor such as DS18B20 and others. In principle, the sensor will detect....
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The AM Transmitter circuits in two and a half, audio amplifier and an RF oscillator. The oscillator is built around Q1 and associated components. Tank circuit L1 and VC1 is melodious from about 500kHz to 1600KHz. These components can be used from an old MW....
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Many tools can be used with a musical instrument to produce various sound effects and the simplest form is the repetition of tone or a method often called echo . Such equipment to create one more turn on the music that you hear. Circuit diagram is for....
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Tools that created this is to produce noisy atmosphere. This circuit is quite simple, this circuit controlled by two 555 timer IC is assisted by other discrete component resistors and capacitors. The first 555 timer U2 will generate a tone which can be heard....
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This circuit is a circuit diagram of the radio-controlled, usually in the toy car application children. Circuit diagram consists of 2 parts of the circuit sender and receiver circuits. To the circuit sending radio signals generated by the oscillator circuit....
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This circuit is a circuit diagram generator melody. This circuit controlled by the IC UM66. The UM66 CMOS IC designed for use in the call bell, telephone, and toys. Has a built in ROM that is programmed to play music. The device has a very low power for....
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This is a circuit diagram of a simple circuit in which the LED burning can be activated only by a gust OFF. A condenser mic (M1) is used to feel your breath. When the S1 button is pressed, transistors Q2 and Q3 as a couple wires attached will be activated....
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This is a circuit diagram of amplifier circuit, these circuits have a 10W audio power amplifier using TDA2003 IC from SGS Thomson popular. The IC can easily provide 10W into 4 Ohms load at 18V DC supply voltage. IC can also be operated from 12V and that....
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This circuit is a circuit diagram gauges simple wind meter. Working principle of this circuit are the transistors Q1 and Q2 are used to feel the wind. The relationship between thermal impedance and the surrounding transistors utilized wind speed here.....
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This circuit is designed to create an early warning alarm system for any form of theft that are important to the owners of a motorcycle or bicycle. This alarm system can be used a number of normally open switches such as mercury (italics) switch. It works by....
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This is a circuit diagram of the triangular wave producing circuit. We can produce the triangular wave with a series of two Op-Amp. You can use the LM741 op-amp. Op-amp first (left) is a series of comparison (comparator) while the Op-Amp circuit second....
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This circuit is a circuit diagram of an indicator to show battery voltage 12 volts. Working principle of this circuit is the battery voltage compared with the reference voltage. By using the LM324 IC, which is a type LM324 Low Power Quad Operational....
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Circuit diagram is water activated relay circuit. In this diagram circuit using two transistors connected as a high gain compound pair. 2N2222A transistors T1 and T2 may be a BC108. Current gain will be the product of each transistor beta, which will be a....
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Circuit diagram is designed to strengthen the input of a telescopic whip antenna. The Preamplifier is designed to cover the medium waveband from about 550Khz to 1650Khz. Tuning voltage is supplied via RV2, a 10k potentiometer connected to the 12 Volt power....
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This is a circuit diagram circuit AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and pinout. Designed popular ZN414 IC this receiver covers medium wave band band from....
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This circuit is a circuit diagram of ECM Mic Preamplifier. A microphone amplifier that can be used with either Electret Condenser Microphone (ECM). Preamplifier has a dynamic range very well and can handle anything from a whisper to a scream, but must be....
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This circuit is a circuit diagram of resource replacement 1. 3V mercury cells or other small batteries. This has many uses and you can use this circuit in the computer to turn on a front panel multi adapter which has a digital thermometer. This circuit took....
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This circuit is a circuit diagram indicates when the input voltage differs from two defined limits, V1 and V2. The limits that can be adjusted and the circuit is designed to trigger the adjustable window . Supply voltage, Vcc must be higher than the highest....
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Motion detectors often we hear, is to use ultrasonic sensors, the advantages of this sensor is sensitive and rapid response. But the main problem is that sometimes these sensors also respond to vibration in the environment, such as a passing car or plane....
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A simple power op amps to 300 Hz operation. One type of circuit is more difficult to protect the flow regulator. Because it`s been fixed, the normal protections are not working. Circuit to limit the voltage regulator allows the flow of excessive current flow....
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This circuit is a series of electric lamps Flasher. This circuit is designed for flash bulb 12V approximately one-second per level. Base behind when Q2 Q1 provides biasing to eliminate the need for a resistor. Typically, a cold light bulb can be pulled eight....
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This circuit is the High Input Voltage regulators, which generate voltage 5V. In these circuit LM340 input voltage must remain within the limits specified in the data sheet. If the device is operated above the absolute maximum input voltage rating, two....
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This 4-channel commutator uses the 2N4091 to achieve low channel ON resistance (k30X) and low OFF current leakage. The DM7800 voltage translator is a monolithic device which provides from a10V to b20V gate drive to the JFETs while at the same time providing....
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This analog switch uses the 2N4860 JFET for its 25 ohm rON and low leakage. The LM102 serves as a voltage buffer. This circuit can be adapted to a dual trace oscilloscope chopper. The DM7800 monolithic IC provides adequate switch drive controlled DTL-TTL....
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This circuit is a Adjustable voltage reference circuits, a voltage source which provides a voltage greater than the reference diode. High precision extended temperature applications of the circuit require that the range of adjustment of VOUT be restricted.....
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The circuit are suited for high precision extended temperature service if V+ is reasonably constant since IZ is dependent on V+. R1, R2, R3, and R4 are chosen to provide the proper IZ for minimum T. C. and to minimize errors due to Ibias. The circuits shown....
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A single diffused, wide base transistor like the 2N3740 is recommended because it causes fewer oscillation problems than double diffused, planar devices. In addition, it seems to be less prone to failure under overload conditions; and low cost devices are....
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This circuit shows the adjustable regulator circuit is conjunction with a voltage regulator, but on this circuit using the LM117 regulator of alternative flows in addition to providing a reference, not a diode LM113. Both regulators currently require a....
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Converting into voltage is undesirable for two reasons: first, an impedance is inserted into the measuring line causing an error; second, amplifier offset voltage is also amplified with a subsequent loss of accuracy. The use of a current to voltage....
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This circuit is that the traditional tungsten filament lamp amplitude regulator is eliminated along with its time constant and linearity problems. In addition, the reliability problems associated with a lamp are eliminated. The Wien Bridge oscillator is....
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The generator embodies an integrator as a ramp generator and a threshold detector with hysterisis as a reset circuit. The integrator has been described in a previous section and requires no further explanation. The threshold detector is similar to a Schmitt....
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Simple circuit diagram is a schematic remote control, remote control where it consists of two parts of the transmitter and receiver. The first part is a transmitter, circuit diagrams for transmitter IC is controlled by the NE555. This system works by....
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The circuit is temperature to pulse width converter. The LM3524 to convert the output of an LM135 temperature transducer into a pulse width which can be measured by a digital system, such as a microprocessor controlled data acquisition system. In this....
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The diagrams a circuit which performs this function with 0. 25% exponential conformity over a range from 20 Hz to 15 kHz using a single LM392 and an LM3045 transistor array. The exponential function is generated by Q1, whose collector current will vary....
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This circuit is average reading use rms calibrated AC voltmeter. Deletion of C2 removes the averaging function and provides a precision full-wave rectifier, and deletion of C1 provides an absolute value generator. Circuit operation may be understood by....
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This circuit can generate voltage 15V. In these circuit LM340 input voltage must remain within the limits specified in the data sheet. If the device is operated above the absolute maximum input voltage rating, two failure modes can occur. With the output....
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This circuit a simple analog multiplier, the circuit operation may be understood by considering A2 as a controlled gain amplifier, amplifying V2, whose gain is dependent on the ratio of the resistance of PC2 to R5 and by considering A1 as a control amplifier....
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Some still remember the serial RS232 port or ports, or there is also a call COM PORT because rarely posrt RS232 function has been replaced with a USB port. But I`m sure, to electronics engineering student, or other techniques to learn techniques such as....
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Perhaps we often see robots line follower robot which is going to follow the line on the track. in general line follower robot is controlled by a microcontroller, but in this article online follower robots in the design without using the microcontroller. For....
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If you need a tool to save electricity you use, so in this article a simple power saving device circuit diagram is very suitable for you to test. Basically, this tool can really save electricity in your home from 10-25%. Work of this tool is simply to reduce....
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This circuit is an automatic street light controller. Sensors used to detect changes in light is LDR (Light dependent resistor), the working principle of Light dependent resistor is exposed to light when the resistance value of LDR great, but if not exposed....
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This is a battery charger circuit, this circuit has advantages, which can cut off electrical charging of the battery automatically. Voltage sensor used in this circuit is the LM301 IC2. This sensor serves to disconnect the battery if the charging voltage has....
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This circuit is a motion detection sensor, this circuit uses a light source and detector as a sensor infrared motion detector. Motion sensor using infrared LED and phototransistor. Because it uses light to the sensor sensitivity can be affected by....
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The following diagram is the circuit diagram of 20W power amplifier which build based tube component EL34. EL34 is very famous tube and great for power tube amplifier. The circuit above is complete circuit contains tube amplifier circuit diagram and power....
This is a circuit of Voltage-to-Pulse Duration Converter. This circuit is used to convert voltage into pulse duration by combining a timer IC and an OP Amp..
This is a Voltage Controlled Oscillator? (VCO) circuit. This circuit is based on Hartley oscillator. The frequency depend on the value of C1 and L1. The...
Voltage Converter Circuit diagram for 3 volts to 5 volts (3v to 5v) using IC (CMOS Monolithic) MAX660 and MAX667-a positive voltage regulator..
Voltage-to-frequency converter (VFC)? circuit is shown in the schematic diagram below. The circuit employs 555 IC as the core of its function. This circuit ...
Voltage inverter circuit design electronic project using few electronic components..
This circuit consists of a UJT oscillator in which the timing charge capacitor C2 is linearly dependent on the input sigoal voltage. The charging current is set by the voltage across resistor R5. which is accurately controlled by the amplifier..
This voltage to frequency converter circuit has an oscillator that is voltage controlled and has a small, 0.5% deviation. IC1 function as a multivibrator a...
Normally we often encountered the frequency meter can be used in speed sensor, tachometer, measurement or signal recurring. This frequency to voltage converter (FVC) can be used to change the voltage into a digital or analog tachometer. Circuit that consists....
Below is a comparator circuit which is can measure with step of 1 volt, the voltage of car battery. The indication of voltage is done by comparison of? ...
Water level controller circuit described here control the water level inside a tank. There two modes available with this water level controller circuit. The...
This White LED lights illuminates your porch with cool white light. The circuit is too simple and energy saving design. Its current consumption is practica...
Field strength meter is extremely useful when working with RF devices. It can be used to quickly diagnose whether a transmitter circuit is working, and can be used to detect RF signals in the environment. The simplest field strength meter could be built with....
Incandescent lamp has been used to reduce harmonic distortion in sine oscillator circuit. The nonlinear resistance characteristic of the lamp filament help the...
The excellent high input impedance, high slew rate, and high voltage qualities of CA3140 op-amp make it suitable for Wien-bridge sine wave oscillator. The basic circuit for Wien-bridge sine wave oscillator is shown in the figure below (the upper part). You....
This circuit is a wireless car alarm system that is built using two circuit modules, namely modules of transmitter and receiver modules. This circuit works on FM radio waves. Car alarms can be used on vehicles that have a 6-12VDC power supply. You can use....
Tom Au-Yeung and Wilson Tang, Maxim Integrated Products EDN You can make a wireless temps system with two ICs You can use a local temperature sensor and an ASK (amplitude-shift-keying) transmitter/receiver pair to design a simple wireless....
This high-performance video-camera link transmits signals from your video camera to your VCR, or from your VCR to TVs throughout your home. The first stage of the rf chain is a crystal-controlled oscillator, Q1, with a frequency of 60 to 65 MHz, which is....
This is Xenon Strobe Light circuit, model continual use a tube Xenon at give many brightnesses. By can fine blink fast or slow get , with VR1. By have SCR...
This circuit is used for remote photographic flash units that flash at the same time as the flash attached to the camera.This circuit is designed to the trigger cord or hot shoe connection of a commercial portable flash unit and triggers the unit from the....
Video recorder, DVD player and TV game, have component video output. The component video signal is like RGB video signal, but it cannot connect to RGB monitor...
ZXLD1100 is a PFM flyback DC to DC boost converter that work in discontinuos mode. The following circuit diagram show you about setting 4 LED Driver for Handset LCD Backlight using this device. The ZXLD1100 designed for driving 2,3,4 series connected white....
Audio frequency-shift keying (AFSK) is a modulation technique by which digital data is represented by changes in the frequency (pitch) of an audio tone, yielding an encoded signal suitable for transmission via radio or telephone. Normally, the transmitted....
This circuit is a circuit diagram to convert the speaker into the microphone. In principle When sound waves fall on the diaphragm of a speaker, there will be fluctuations in the coil and the induced voltage will be no small proportion. This induced voltage....
Depending on its design an electric guitar may have anything from one to six pickup elements. Classic (acoustic) guitars could also benefit from one or more retro- ¬tted pickups. Each pickup has a specific sound depending on the type of sensor and the....
The key to using a soundcard successfully in digital signal processing or digital radio applications lies principally in the characteristics of the soundcard itself. This applies in particular to SDR (software de ¬ ned radio) programs that turn your PC into....
Nowadays a lot of intercom units are equipped with video cameras so that you can see as well as hear who is at the door. Unfortunately, the camera lens is perfectly placed to serve as a sort of support point for people during the conversation, with the....
Magnetic pick-ups in musical instruments have a relatively high output impedance. This can result in a reduction in treble response when connected via a long cable run or to equipment with a low input impedance. This preamplifier provides a high input....
Do you suspect your broadband speed (DSL) is slower than it should be It could be as simple as incorrect polarity in your phone wall socket. Build this very cheap, very simple device to find out whether you need to change your wiring! It might not seem that....
This circuit breaks an input voltage signal down into its components: (1) the absolute value and (2) the polarity or sign` (+ or ). It will handle direct input voltages as well as alternating voltages up to several kHz. With a supply voltage of ±9 V, the....
The fan runs constantly in many PCs, which may not even be necessary. A simple controller circuit can regulate the fan speed according to demand. This not only saves energy, it also reduces irritation from the fan noise. Only three components are needed to....
This circuit is a frequency meter, low cost. It covers region 1HZ until 1MHZ. The IC1 schmitt trigger that it regulates the signal of entry and him changes in reasonable level suitable for the IC2-3-4. With the tenth pulse in the entry of IC2/1, is produced....
The incoming ring is detected by transistor T1 and components wired around it. In absence of ringing voltage, transistor T1 is cut off while transistor T2 is forward biased as resistor R2 is returned to the positive supply rails. As a result collector of....
If you want to create the 100 watt OCL audio amplifier circuit. I want you to consider this circuit as one. It uses STK4231 IC products to create a simple, small and best economical. The STK4231 is Hybrid IC of Sanyo, in the family of STK4201II. Can provide....
April 2006 was the twentieth anniversary of the Chernobyl reactor accident. In the days following the incident winds deposited much of the reactor contents across central Europe, Scandinavia and the UK. A large area surrounding the reactor is still off....
Many of you will have an old mobile phone gathering dust. The circuit shown in this article gives the old mobile a new lease of life, enabling it to switch an electrical appliance on and off in or around the home. The circuit will even talk to you on in....
Remote controlled light switches are becoming more and more common. DIY stores have inexpensive sets consisting of several light switches and a remote control unit. It`s then easy to control everything from your armchair. But how can you control the lighting....
A trip unit is electrically connected in parallel with a current limiting polymer element in series with circuit breaker contacts to function as a shunt resistance for the polymer element. It becomes energized by transition of the polymer element to its high....
In this issue, we feature articles on a variety of measurement-and sensor-related embedded design projects. I encourage you to try similar projects and share your results with our editors. Starting on page 14, Petre Tzvetanov Petrov describes a multilevel....
555-Timer has vast application in electronics. In my recent post I showed you other forms in which a 555-Timer could be applied. Today, we shall use 555-Timer in a Monostable Multivibrator configuration to trigger a Driver (Transistor) in energizing a relay....
An analog VU meter is often included in the audio equipment to display signal levels in volume units. Analog VU meters with peak LED Another Thumbnail magnetoelectric VU meter response of a VU meter (black line) compared with the instantaneous input level....
Digital scoreboard circuit functions to display values from 0 to 9 on the 7 segment display. 7 segments using a type of common anode. 7 segment driver IC using a 74LS47 or 74LS247. On the digital scoreboard circuitry uses a 555 timer ic, serves to produce a....
Ultrasonic sensor circuit is a sensor that consists of transmitter and receiver. This circuit is useful for remote control. The frequency of sound produced by a series of Ultrasonic Sensor is above 20 KHz which is between 40 KHz 50 KHz. Used power supply....
In this article we make digital thermometer on the Arduino Uno. In this Digital Thermometer temperature sensor used is LM35DZ. In other applications you can replace with LM35 temperature sensor such as DS18B20 and others. In principle, the sensor will detect....
The AM Transmitter circuits in two and a half, audio amplifier and an RF oscillator. The oscillator is built around Q1 and associated components. Tank circuit L1 and VC1 is melodious from about 500kHz to 1600KHz. These components can be used from an old MW....
Many tools can be used with a musical instrument to produce various sound effects and the simplest form is the repetition of tone or a method often called echo . Such equipment to create one more turn on the music that you hear. Circuit diagram is for....
Tools that created this is to produce noisy atmosphere. This circuit is quite simple, this circuit controlled by two 555 timer IC is assisted by other discrete component resistors and capacitors. The first 555 timer U2 will generate a tone which can be heard....
This circuit is a circuit diagram of the radio-controlled, usually in the toy car application children. Circuit diagram consists of 2 parts of the circuit sender and receiver circuits. To the circuit sending radio signals generated by the oscillator circuit....
This circuit is a circuit diagram generator melody. This circuit controlled by the IC UM66. The UM66 CMOS IC designed for use in the call bell, telephone, and toys. Has a built in ROM that is programmed to play music. The device has a very low power for....
This is a circuit diagram of a simple circuit in which the LED burning can be activated only by a gust OFF. A condenser mic (M1) is used to feel your breath. When the S1 button is pressed, transistors Q2 and Q3 as a couple wires attached will be activated....
This is a circuit diagram of amplifier circuit, these circuits have a 10W audio power amplifier using TDA2003 IC from SGS Thomson popular. The IC can easily provide 10W into 4 Ohms load at 18V DC supply voltage. IC can also be operated from 12V and that....
This circuit is a circuit diagram gauges simple wind meter. Working principle of this circuit are the transistors Q1 and Q2 are used to feel the wind. The relationship between thermal impedance and the surrounding transistors utilized wind speed here.....
This circuit is designed to create an early warning alarm system for any form of theft that are important to the owners of a motorcycle or bicycle. This alarm system can be used a number of normally open switches such as mercury (italics) switch. It works by....
This is a circuit diagram of the triangular wave producing circuit. We can produce the triangular wave with a series of two Op-Amp. You can use the LM741 op-amp. Op-amp first (left) is a series of comparison (comparator) while the Op-Amp circuit second....
This circuit is a circuit diagram of an indicator to show battery voltage 12 volts. Working principle of this circuit is the battery voltage compared with the reference voltage. By using the LM324 IC, which is a type LM324 Low Power Quad Operational....
Circuit diagram is water activated relay circuit. In this diagram circuit using two transistors connected as a high gain compound pair. 2N2222A transistors T1 and T2 may be a BC108. Current gain will be the product of each transistor beta, which will be a....
Circuit diagram is designed to strengthen the input of a telescopic whip antenna. The Preamplifier is designed to cover the medium waveband from about 550Khz to 1650Khz. Tuning voltage is supplied via RV2, a 10k potentiometer connected to the 12 Volt power....
This is a circuit diagram circuit AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and pinout. Designed popular ZN414 IC this receiver covers medium wave band band from....
This circuit is a circuit diagram of ECM Mic Preamplifier. A microphone amplifier that can be used with either Electret Condenser Microphone (ECM). Preamplifier has a dynamic range very well and can handle anything from a whisper to a scream, but must be....
This circuit is a circuit diagram of resource replacement 1. 3V mercury cells or other small batteries. This has many uses and you can use this circuit in the computer to turn on a front panel multi adapter which has a digital thermometer. This circuit took....
This circuit is a circuit diagram indicates when the input voltage differs from two defined limits, V1 and V2. The limits that can be adjusted and the circuit is designed to trigger the adjustable window . Supply voltage, Vcc must be higher than the highest....
Motion detectors often we hear, is to use ultrasonic sensors, the advantages of this sensor is sensitive and rapid response. But the main problem is that sometimes these sensors also respond to vibration in the environment, such as a passing car or plane....
A simple power op amps to 300 Hz operation. One type of circuit is more difficult to protect the flow regulator. Because it`s been fixed, the normal protections are not working. Circuit to limit the voltage regulator allows the flow of excessive current flow....
This circuit is a series of electric lamps Flasher. This circuit is designed for flash bulb 12V approximately one-second per level. Base behind when Q2 Q1 provides biasing to eliminate the need for a resistor. Typically, a cold light bulb can be pulled eight....
This circuit is the High Input Voltage regulators, which generate voltage 5V. In these circuit LM340 input voltage must remain within the limits specified in the data sheet. If the device is operated above the absolute maximum input voltage rating, two....
This 4-channel commutator uses the 2N4091 to achieve low channel ON resistance (k30X) and low OFF current leakage. The DM7800 voltage translator is a monolithic device which provides from a10V to b20V gate drive to the JFETs while at the same time providing....
This analog switch uses the 2N4860 JFET for its 25 ohm rON and low leakage. The LM102 serves as a voltage buffer. This circuit can be adapted to a dual trace oscilloscope chopper. The DM7800 monolithic IC provides adequate switch drive controlled DTL-TTL....
This circuit is a Adjustable voltage reference circuits, a voltage source which provides a voltage greater than the reference diode. High precision extended temperature applications of the circuit require that the range of adjustment of VOUT be restricted.....
The circuit are suited for high precision extended temperature service if V+ is reasonably constant since IZ is dependent on V+. R1, R2, R3, and R4 are chosen to provide the proper IZ for minimum T. C. and to minimize errors due to Ibias. The circuits shown....
A single diffused, wide base transistor like the 2N3740 is recommended because it causes fewer oscillation problems than double diffused, planar devices. In addition, it seems to be less prone to failure under overload conditions; and low cost devices are....
This circuit shows the adjustable regulator circuit is conjunction with a voltage regulator, but on this circuit using the LM117 regulator of alternative flows in addition to providing a reference, not a diode LM113. Both regulators currently require a....
Converting into voltage is undesirable for two reasons: first, an impedance is inserted into the measuring line causing an error; second, amplifier offset voltage is also amplified with a subsequent loss of accuracy. The use of a current to voltage....
This circuit is that the traditional tungsten filament lamp amplitude regulator is eliminated along with its time constant and linearity problems. In addition, the reliability problems associated with a lamp are eliminated. The Wien Bridge oscillator is....
The generator embodies an integrator as a ramp generator and a threshold detector with hysterisis as a reset circuit. The integrator has been described in a previous section and requires no further explanation. The threshold detector is similar to a Schmitt....
Simple circuit diagram is a schematic remote control, remote control where it consists of two parts of the transmitter and receiver. The first part is a transmitter, circuit diagrams for transmitter IC is controlled by the NE555. This system works by....
The circuit is temperature to pulse width converter. The LM3524 to convert the output of an LM135 temperature transducer into a pulse width which can be measured by a digital system, such as a microprocessor controlled data acquisition system. In this....
The diagrams a circuit which performs this function with 0. 25% exponential conformity over a range from 20 Hz to 15 kHz using a single LM392 and an LM3045 transistor array. The exponential function is generated by Q1, whose collector current will vary....
This circuit is average reading use rms calibrated AC voltmeter. Deletion of C2 removes the averaging function and provides a precision full-wave rectifier, and deletion of C1 provides an absolute value generator. Circuit operation may be understood by....
This circuit can generate voltage 15V. In these circuit LM340 input voltage must remain within the limits specified in the data sheet. If the device is operated above the absolute maximum input voltage rating, two failure modes can occur. With the output....
This circuit a simple analog multiplier, the circuit operation may be understood by considering A2 as a controlled gain amplifier, amplifying V2, whose gain is dependent on the ratio of the resistance of PC2 to R5 and by considering A1 as a control amplifier....
Some still remember the serial RS232 port or ports, or there is also a call COM PORT because rarely posrt RS232 function has been replaced with a USB port. But I`m sure, to electronics engineering student, or other techniques to learn techniques such as....
Perhaps we often see robots line follower robot which is going to follow the line on the track. in general line follower robot is controlled by a microcontroller, but in this article online follower robots in the design without using the microcontroller. For....
If you need a tool to save electricity you use, so in this article a simple power saving device circuit diagram is very suitable for you to test. Basically, this tool can really save electricity in your home from 10-25%. Work of this tool is simply to reduce....
This circuit is an automatic street light controller. Sensors used to detect changes in light is LDR (Light dependent resistor), the working principle of Light dependent resistor is exposed to light when the resistance value of LDR great, but if not exposed....
This is a battery charger circuit, this circuit has advantages, which can cut off electrical charging of the battery automatically. Voltage sensor used in this circuit is the LM301 IC2. This sensor serves to disconnect the battery if the charging voltage has....
This circuit is a motion detection sensor, this circuit uses a light source and detector as a sensor infrared motion detector. Motion sensor using infrared LED and phototransistor. Because it uses light to the sensor sensitivity can be affected by....
The following diagram is the circuit diagram of 20W power amplifier which build based tube component EL34. EL34 is very famous tube and great for power tube amplifier. The circuit above is complete circuit contains tube amplifier circuit diagram and power....
