Top Circuits Page 100
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This counter uses a four-digit display, but with a flip of the range switch, it can display frequencies from 1 to 40 MHz, with a resolution of 100Hz. The MM74C926 CMOS IC contains a four-digit decimal counter that can latch a given count and then use this....
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This tachometer lets you measure heartbeats, respiratory rates, and other low-frequency events that recur at intervals of 0.33 to 40.96 seconds. The circuit senses the period offm, computes the equivalent pulses per minute, and updates the LCD accordingly.....
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This series-feedback series of compounds give a high input impedance and stable, gain wide-band video amplifier for general purpose applications. Low Capacitance, High Impedance, Amplifier Circuit,...
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For the best advantage as a low noise high input impedance device, the preamp and tone control uses JFET. If the circuit reaches harmonic distortion levels of...
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This is a Low Cost Universal Battery Charger Circuit. This circuit is used to charge NiCD-NiMH batteries and ideal for car use. This circuit transforms a mains...
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This is a Low Distortion Crystal Oscillator circuit. This circuit generate a sinewave that has low phase noise and distortion. This circuit can be used to...
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With very low harmonic distortion, 2N4416 JFET is suitable to smoothly oscillate in a circuit. On application where low harmonic content is required for a good mixer circuit, JFET local oscillator is very good. Below is the circuit diagram of Low Distortion....
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Looking for an efficient USB charger that can operate from a 12V car battery This unit functions at up to 89% efficiency and can charge USB devices at currents up to 525mA. Best of all, it won`t flatten the battery if it`s left permanently connected, as long....
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Sometimes you have a situation where you have a 5-V supply voltage but part of the circuit needs a lower supply voltage. A voltage regulator from the Texas Instruments TPS62000 family [1] is a good choice for this if the current consumption is less than 600....
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The microphone preamplifier circuit design presented in this schematic use SSM2015 produced by Precision Monolithics Inc. (PMI) which offers a high amplifi...
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This be power motor controller 12V circuit. with a signal MCU Control be high class voltage , about 3V. It can motor control turn advance or walk go backwards...
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You will find later some applications such as Basic Circuit Description, Block Diagram of the MF10, Programmable Dual Clock Generator, Butterworth Lowpass filter, MF10 as an Input Filter and Sample/Hold, Generating Quadrature Sine Waves, and the....
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The MOC3021is optically isolated triac driver devices. These devices contain a GaAs infrared emitting diode and a light activated silicon bilateral switch, which functions like a triac. They are designed for interfacing between electronic controls and power....
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Preamplifier circuit provides the proper loading for phono cartridges reluctance. This provides about 25 dB at 1 kHz gain (2.2 mV to 100 mV input output), features of S N/N ratio better than -70 dB (referenced to 10 mV input at 1 kHz) and has a dynamic range....
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This circuit is made to be an alarm, both for home and handbags. If it is installed for home it will placed on door or windows, and if it is installed for bags...
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The following circuit shows about Mains Remote-Alert Circuit Diagram. Features: simple circuitry, the transmitted signal is conveyed into the ...
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Metal Detector Circuit Overview The metal detector circuit is an electronic circuit that is specifically designed to detect metal that lies deep in the water...
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Metal detector schematic circuit using CS209A and few electronic components..
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Signal clipping is usually avoided in most application, but we can find some useful examples where clipping is intentionally employed in audio processing. One ...
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This is Micro inverter or The inverter very small-sized, perform modify from the energy battery the small-sized , have the value voltage about 220V AC Volt...
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Microphone can`t be directly connected to a power amplifier because the signal is too weak. Standard audio power amplifier accept about 1 Vrms to give a full...
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In the ADM666A application note, you can find detailed explanation about this low cost battery charger circuit such as Maximum output voltage, Charge termination voltage calculation, monitoring the battery voltage level, maximizing the circuit efficiency,....
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Here`s a project that could be useful this summer on the beach, to stop anyone touching your things left on your beach towel while you`ve gone swimming; you might equally well use it at the office or workshop when you go back to work. In a very small space,....
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This is a Logic probe circuit is one, That is suitable for checking the voltage levels in the TTL circuit. It receives from the circuit being tested. Shows how high or low logic level one. The circuit when the input voltage to the probe Tip is higher than 2.....
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Finally mark the entire scale with the usual metronome steps as following: 40 - 42 - 44 - 46 - 48 - 50 - 52 - 54 - 58 - 60 - 63 - 66 - 69 - 72 - 76 - 80 - 84 - 88 - 92 - 96 - 100 - 104 - 108 - 112 - 116 - 120 - 126 - 132 - 138 - 144 - 152 - 160 - 168 - 176 -....
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It will be effective to use simple half wave motor speed control with small universal? ac/dc motors. Two amps RMS is the maximum current capability. The...
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This handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one-and-a-half metres. So it can be used to prevent use of mobile phones in examination halls, confidential rooms, etc. It is also....
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To complement the 60 Watt MosFet Audio Amplifier a High Quality Preamplifier design was necessary. A discrete components topology, using and - 24V supply rails was chosen, keeping the transistor count to the minimum, but still allowing low noise, very low....
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Monolithic/Hybrid Digital to Analog Converters using MC 1408IC,SE/NE 5018, Specifications and Applications...
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This circuit included in the category astable multivibrator. This circuit is used to test? N-Mosfets (the power kind e.g irf830), whether it works or not. If...
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Below is a block diagram of a modern automated systems incorporate closed-loop feedback for motion control. They typically include a servo system that consist...
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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 detection, detection sensor, sensor, infrared, LED, phototransistor, transmitter, receiver, NE555, astable multivibrator,....
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The Motion Sensor Switch circuit is a motion sensor controlled automatic water sprinkler but you can easily add an alarm/light function too. Before beginni...
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A dual benefit for battery-powered portable devices is provided by Class D audio amplifier. The produce much less power dissipation than do their linear cousins...
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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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Motorola SN54/74LS138 known to be 1-of-8 decoder or demultiplexer which is designed for high speed bar memory chip select address decoding. Below diagram illustrates logic diagram of this SN54/74LS138 demultiplexer. According to the SN54 datasheet, multiple....
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This project can be used for many different purposes. Probably the most used application would be to interface to any electronic project that requires a keypad. There are several ready made keypads on the market, but those work with matrix connections and....
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The following diagram is the Clock Generator circuit diagram which build based on NAND Gate logic IC. You may use IC 7400 or 4011 for this circuit. The 7400 is a TTL type, while 4011 is CMOS type. IC 4011 is cheaper than 7400 but the 7400 is faster than 4011. ..
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Here is the circuit diagram of V/F Converter in negative input voltage. It uses the VFC32 voltage-to-frequency converter. This VFC32 used to be applied in...
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Opamps are very useful. But one of their major drawbacks is the requirement of a dual supply. This seriously limits their applications in fields where a dual supply is not affordable or not practicable. This circuit solves the problem to a certain extent. It....
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This circuit will power a 6 inch 4 Watt fluorescent tube off a 12 volt supply, consuming 300 mA...
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utilize RGB LED lightsources, an optical sensor and feedback controller. The aim of using optical feedback is a color stability over temperature, maintaining constant brightness, and controlling any color point or brightness required by the LCDs. Within the....
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A solar cell radio used a 3V (or two 1.2V) Ni-Cad battery in it. The battery can not be removed. It use a mini jack socket for charging. Its quiet difficult...
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The monostable flip flop is a electronic circuits that is used to produce a single pulse each time it is triggered. Sometimes, this circuit called a `one...
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STANDBY/ON switch below is appropriate for applications (industrial and telecom, for example) in which the circuitry must remember its state (STANDBY or ON)...
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An output of 4 mA to 20 mA that is linearly proportional to the input voltage is provided by the current transmitter on figure below. Line rejection is...
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Most homes today have at least a few infrared remote controls, whether they be for the television, the video recorder, the stereo, etc. Despite that fact, who among us has not cursed the light that remained lit after we just sat down in a comfortable chair....
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That be On After Delay Circuit. I uses mosfet in the circuit for delay easy more than the transistor. By have the work of the circuit be when press , S1 ,...
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This is a very simple FM receiver which build based on one transistor only. No chip or another active component. The output is connected to earphones, you need an amplifier circuit if you want to listen the radio with a loudspeaker. ..
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Diagram below shows you with a classic test fixture that has been used for long periods in order to give anyone for resolving the non-linearity errors for...
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This is Operational an Amplifier (Op-Amp) Oscillator circuit. This circuit has some advantages, they are this circuit can be operated at low frequencies with...
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The voltage that control a V/F converters will be displayed if we use a frequency counter, which is directly proportional to the input voltage. A 1 second time...
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This article includes an assembly language listing that requires MAC/65 or Atari Assembler Editor. You will also need access to an EPROM burner. The three earlier installments ran in the January, February and March 1985 issues of Antic. This USART design is....
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In some PLL application, sometimes we need to provide lock indication when the PLL is in locked state. The simplest one is binary indication, 0 or 1 to...
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PLL oscillator is used to get very stable frequency woth very low distortion of sine wave output. The stability is equal to crystal-based oscillator, and the low distortion level of the sine wave output is equal to LC based oscillator. The method ofPLL....
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This is class D audio amplifier circuit that is used to control PWM motor speed. This circuit has two advantages for battery-powered portable devices. First, ...
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Imagine the Panic situation in the Midnight when an intruder tries to break into the house. This Alarm will help you with its loud Police siren to abort th...
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This circuit was designed as an aid in parking the car near the garage wall when backing up. Electronics project and circuit diagram. Proximity sensor..
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The circuit was designed to produce an indicator to aid a car from parking especially in places without clear visibility. 1N1418 ...
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Simple pathway lighting that would provide illumination for the path at night. Extension for the Solar garden Light. The torroid is bifilar wound. The Torr...
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This is a schematic diagram of Permanent Magnet Motor Control circuit. This circuit is used to control the permanent magnet control. This circuit uses...
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A phase control circuit can be used to control the power delivered to an AC load. The phase control circuit control the AC waveform, cutting the cycle to give...
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A simple photo switch circuit using NE 555 IC with diagram and schematic.This photo switch ons a relay when light intensity crosses limit.A light sensor circuit for home and industrial purpose..
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The simplest I to V converter is the humble resistor. However, presenting a nonzero impedance to the source of input current is the disadvantage of the humble...
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This circuit is conventional Pierce type oscillator that uses a JFET. The circuit uses fundamental mode crystals. It has decent performance and reliability if...
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A circuit diagram for driving a plasma-type display using ICL7135 is shown in the following schematic. This application is one of the wide versatility variety of this integrating Analog to Digital Converter device..
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The new design of a tutorial board based on the popular PIC16F84A microcontroller. Have a features eight single leds, an LCD display and five push ...
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This is a new design of a tutorial board based on the popular PIC16F84A microcontroller. It features eight single leds, a 7-segment display, an LCD display and five push buttons. It is an ideal solution for the beginner to take his/her first programming....
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This is simple portable audio amplifier circuit. This circuit built based on IC TEA2025 which is a monolithic integrated audio amplifier in a 16-pin plastic dual in line package manufactured by UTC. Circuit has Internal Thermal Protector. It is designed for....
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A compact and portable 12V Solar power inverter circuit that will keep away darkness. This tried and tested design converts 12V DC from the storage battery...
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This is Positive High-Voltage Hot Swap Controller circuit with Power Limiter. This circuit uses the TPS2491 or TPS2490 because both of them have some...
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Implementing peak-detector circuits is very easy with the CA3130, as shown in schematic diagram of this circuit. The figure below shows the schematic diagram of...
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In the 100-kHz application from left to right, the coupling network feeds into the receiver ~section on the bottom of the chip. (The external components are summarized later.) The receive data output is pulled up via RPuLL ~ 10 K!l. A minimum current of 10....
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This a shows the overall circuit diagram of the power control unit. On the left, there is a main relais controlled by the key switch and the ...
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We can generate easily many non-linear functions such as X^1/2, X^2, X^3, 1/X, XY and X/Y using logs. Division becomes subtraction, multiplication becomes...
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Imagine you have a master controller device that control other devices in your house, and you don`t need to install any additional wires to facilitate the data...
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The losses in a bridge rectifier can easily become significant when low voltages are being rectified. The voltage drop across the bridge is a good 1. 5 V, which is a hefty 25% with an input voltage of 6V. The loss can be reduced by around 50% by using....
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Here is a simple Power resumption alarm circuit that can be fixed inside the switch box itself. It gives beeps when the power resumes after a power failure...
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This ac to dc power supply can output 5A in continous operation and 12A peak current. This kind of dc power supplies uses a PCB so you can use two case typ...
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This is the meter show the frequency of a power generator, which it has voltage 110V-240V at 10-100HZ. The output sine waves are converted to square waves by...
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The herein schematic diagrams TPS61042 Current LED driver powering 8 LEDs with 81% efficiency at 3.6V/18.6mA. TPS61042 used to be applied in applications such White LED Supply for Backlight/Sidelight Displays (PDA, Pocket PC, Smart phones, etc)..
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The benefit of LED is longer lifetime than incandescent lamp, and even higher efficiency in latest LED technology. LED is also very compact, but unfortunately...
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Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal ...
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What you will find in this aplication datasheet article are sections that discuss about the practical current booster circuit technique (conventional circuit using CLD, current boosting circuit technique), the analysis of booster circuit principle, the....
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This circuit reacts in presence of any conductor object including humans. This circuit does not detect object movement but can act as an proximity sensor!...
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This is pressure sensor signal conditioning circuit. It is simple and inexpensive circuit because it has small geometry and simple pressure sensor. It just uses...
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Below we will provide you with useful article information to produce your own specific oscillator or pulse generator from integrated circuits (ICs), resistors, and capacitors using no matter the version of the 555 IC..
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This circuit can be used to delay other appliances connected to the output of the relay. After working set To prevent equipment damage from...
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Typical circuit for welding equipment shown on the following circuit diagram. Turn on delay can be controlled accurately with Potentiometer P2. We can discharge...
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This circuit is a Delayed Pulse Generator that is used to provide pulse rate and independent control of initial delay. The pulse generator of this circuit is...
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This be Power Pulse Generator Circuit, by use the integrated circuit NE555 be Square wave Oscillator Generator. Fine the frequency done to a turn R1. From that time send output go to still transistor 2N2222 control give IC LM350T work have voltage come out....
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Pulse width modulator produce a PWM signal, a pulse with a constant frequency but with the duty cycle vary according to a modulating signal. Here is the...
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Quadrature oscillator generate two sine-wave signal, but one signal is shifted 90 degree from the other signal. One output that lead the other called cosine...
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This house FM transmitter for your stereo or any other amplifier provides a good signal strength up to a distance of 500 meters with a power output of abou...
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This stereo FM wireless microphone also makes a great quality audio link. We tested it to beyond 50 meters and it was rock solid. It`s certainly not the first wireless microphone we`ve ever published but this one is a little different. It`s stereo, providing....
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Here is an ultra simple automatic light switch circuit for bedrooms. After construction,connect the input terminals of this circuit in parallel to the inte...
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This circuit is a toy to encourage young children to count. Power is turned on by switch S1, then S2 is closed. This makes nine LEDs flash slowly. S2 is then opened and the LEDs go out. Pressing pushbutton PB1 turns on a random number of LEDs - briefly -....
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The AGC is used in many system especially communications. This AGC? works at 50Mhz, and the output voltage is set by a digital signal that is needed by...
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This fm 88-108 Mhz radio amplifier is equiped with BLF 245 and can be user with a heatsink from a processor and cooler. The BLF 245 Datasheet can be dow...
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A sensitive and reliable rf field strength meter is an invaluable instrument in amateur radio and in radio controlled model area. A field strength meter is...