Popular Circuits Page 243
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Murata Manufacturing Measurement-Based GRH Capacitors Equivalent Circuit Model Schematic Design shows the equivalent circuit model schematic design of the muRata Manufacturing Measurement-based GRH series SMT capacitors that is based on device measurements....
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Balanced signal consist of two lines that have opposite phases, and should be received with differential input receiver. Balanced signal is employed in many....
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This RF converter converts amateur TV signals in the 420- to 450-MHz region to VHF channel 3 or 4, allowing reception of those signals on a standard TV receiver. RF amplifier Ql feeds mixer Ml, and Q3 acts as an IF amplifier. ..
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Based integrated circuits and relays KA constitute humidity alarm value it uses pA741 circuit. MS01 using a wet-type humidity resistance element as a probe. When the humidity e..
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A zener diode placed in series with a voltmeter will prevent the meter from reading until the applied voltage exceeds the zener voltage..
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Here is a simple shock sensitive alarm circuit that has many many applications fro home to automobiles. The main application of this circuit is to use it as an anti theft alarm in automobiles. A peizo electric sensor is used as the shock sensor which has to....
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Getting ready to put Adrian`s Pololu stepper driver circuit together and have run into a question. He mentions that if you are using 5v from the Arduino Mega, to leave out the 78L05. Great! I am thrilled to only have the wrong symbol for ground. I have just....
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This PLL transmitter is controlled and the frequency is very stable and can be programmed digitally. Transmitter will work 88-108 MHz and output power up to 500mW. With a small change can set the frequency of 50-150 MHz. The output power is often set to....
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Stepper motors are available in several versions and sizes with a variety of operating voltages. The advantage of this general-purpose controller is that....
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This is a quick how-to guide for making a stereo VU meter using the LM3915/LM3916. The LM 3916 is an integrated circuit (IC) that takes analog voltage levels and drives 10 LEDs, LCDs, or vacuum fluorescent displays to represent digital voltage levels just....
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This circuit is a ultra low noise magnetic phono preamp. This circuit uses an LM381/1A. This circuit also includes RIAA equalization. This circuit has ultra....
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Most people believe spark gap Tesla Coils can only be operated from high voltages - typically 4 - 15kV or more. But some unusual experiments can be made with as little as 240V - directly. Outside of very low frequency Pancake Coils, there is little practical....
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Battery Voltage monitor is used to indicate the voltage level of 12 volt battery circuit of battery voltage monitor verified electronics project circuit with description...
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The UPS is basically an ac inverter that is powered by a 12-V, lead-acid automobile battery. During power outages, it can supply several minutes of power for an average personal computer. It incorporates a crystal-controlled 60 Hz time base, so that a....
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As shown, the 555 and the surrounding elements constitute a voltage - frequency conversion circuit. For determining the orientation of Earths magnetic field is a Hall-effect de..
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In synchronizing the audio and the projected film, a tone code must be used. This tone code triggers a device which automatically changes the film or slide. To do this you need a two channel tape recorder. The normal audio program must be recorded in one....
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Flashes a LED when detecting an incoming call, Powered by one 1.5V cell This circuit was designed to detect when a call is incoming in a cellular phone (e....
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This tester is designed to locate stray electromagnetic (EM) fields. It will easily detect both audio and RF signals up to frequencies of around 100kHz. Note, however that this circuit is NOT a metal detector, but will detect metal wiring if it conducting ac....
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This circuit was designed to detect when a call is incoming in a cellular phone (even when the calling tone of the device is switched-off) by means of a flashing LED.
The device must be placed a few centimeters from the cellular phone, so its sensor coil L1....
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Converting periodic waveforms to square waves is an integral part of extracting a clock signal from data, creating waveform generators, and making timing-pulse generators. Any square-wave-conversion circuit is more valuable when the square wave`s duty cycle....
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The LTC10432 switched-capacitor building block provides nonoverlapping complementary drive to the Ql to Q4 power MOSFETs. The MOSFETs are arranged so that Cl and C2 are alternately placed in series and then parallel. During the series phase, the + 12 V....
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There are other chips or programs that do blanking and fading in from the side which is a cool effect. Like the signs at the ballpark. I don`t think this one does that particular trick but I intend to find out! The clock goes into slot machine mode every n....
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A relay circuit to function as a DPDT toggle which is controlled by a momentary switch. I strive to keep my circuits simple with little or no integration (555`s, transistors, etc). The circuit is shown active or on mode. Half of RL1 and RL2 manipulate the....
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This circuit combines a 555 timer with a 2N2222 transistor and an external potentiometer. The pot adjusts the output voltage to the desired value. To regulate the output voltage, the 2N2222 varies the control voltage of the 555 IC, increasing or decreasing....
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Here's another daft yet interesting PIC12F675 idea I came up with. When I wanted to show someone how logic gates worked I could only find a NAND gate which wasn't very handy for demonstrating AND's OR's, NOR's and ExOR's. I also wanted to have a play with....
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The schematic diagram below appears LM3909 Typical 1.5V Flasher circuit. It is known that LM3909 is an oscillator, a monolithic one, which is designed to flash Light Emitting Diodes (LED)..
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You`ll feed the audio from each radio into the ipod audio output, and vice versa. which changes the impedance and affects the sound levels (along with possibly damaging the audio circuit of one or all of the radios involved). I`m no expert, by I don`t think....
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This circuit really is the simplest inducer balancing metal detector (IB, Inductlon Balance) that can be built. The LB metal detection method has a satisfactory depth of penetration and good distinction between iron-based and noble metallic objects. Several....
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An electronic version of a chirping canary. May be used as an alarm, a sound effects generator or perhaps a replacement doorbell....
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With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value. For example if it is increased to 22uF the flashing rate becomes 1 second. There is also....
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The circuit is based around {LM4702}manufactured by NATIONAL semiconductors&{MJ11029-MJ11028} by ON semiconductors It is a high fidelity audio power amplifier. Designed for demanding consumer and pro-audio applications. You can also use this circuit with AV....
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Shown respectively for the subwoofer amplifier stage pre-amplifier circuit and the signal processing circuit. Here, in particular, the choice of the..
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This is a simple ceiling fan regulator circuit diagram. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because it`s control the speed of a AC motor(Ceiling Fan). This ceiling fan regulator....
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This is a fun and useful circuit for demonstrating high frequency high voltge. It can produce up to about 30KV, depending on the transformer used. It is cheap and easy to make, thanks to the standard TV flyback transformer used. It can power LASERS (although....
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555 Timer Time Delay Circuit LEDs indicate at a glance what the status of the circuit is at any given moment. Once the reset switch, SW2, makes....
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Built around an Intersil 7216 frequency-counter IC, this counter has a basic range of 10 MHz, a 100-MHz prescaler, and an extra frequency divider (IC3). This divider divides `oy an extra factor, as marked on S7 (see schematic), to extend the range of the....
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The working principle of this cheap and easy to build metal detector circuit consists in mixing two equal frequencies which causes a low-frequency interference. When one of the oscillators become unstable then the frenquency of the interference will be....
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Figure 1 shows a block diagram for a fan speed control
system using the LTC1840. The LTC1840 contains two
current DACs used to gain full control over fan speed. The
scaled currents individually adjust the fan-driving output
voltage of a switching....
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Toyota Mrs Exterior Lights Wiring Diagram Manual PDF Download...
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This is a circuit that is used to menhidupkan LED with voltage 230Volt, 230Volt it so that the voltage must be lowered in accordance with the needs of the LED itself. To lower it even necessary circuit as below...
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A new generation of intelligent, scriptable sensors/controllers is around the corner. Up to date, the classical approach at the heart of many simple machines consisted of separated thermometer and control units. By contrast, my design is a unified....
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Cb125S Wiring Diagram Manual PDF Download...
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It plugs into the USB port and is just the shot for checking motherboard switch and jumper settings. Many readers will remember a commercial product of a few years ago, the "Itty Bitty Book Light". It was designed to clip over the top of a book to give just....
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The resistor capacitor network R1-R2-C1 provides a ramp-type reference voltage superimposed on top of a dc voltage adjustable with the speed-setting potentiometer R2. This reference voltage appearing at the wiper of R2 is balanced against the residual....
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The wailing sound of a siren is generated by a VFO consisting of Q1 and Q2. Capacitor C2 provides the feedback for the oscillator. The frequency of the oscillator is varied by the voltage applied to the base of Q1 through R3. When switch S1 is closed,....
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Safety polarity connection circuit design using common electronic components..
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The G9 project is an adaptation of the Gyratec IX dual microphone/line/DI preamplifier to suit the DIY`ers demands. Searching the net, I`ve never come across a complete tube microphone preamp design, so I decided to share this version of our very popular....
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Boards are powered by two 9volt alkaline batteries. Circuits are a compilation of circuits found in the Radio Shack Engineering Handbook for making pulse modulated LED transmitters and receivers. The laser diode "D1" is substituted with an inexpensive laser....
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the rest of the pictures show the construction of the sub. It was made out of two C channels connected by an aluminum sheet. A skid was added to the bottom to allow the sub to skate over the bottom to gather quantitative video samples of the ecology. The....
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This figure is converted into the manifold LM567 SCA broadcast reception information machine schematic. LM567 narrow-band phase-locked loop center to meet the basic role of SCA broadcast demodulation...
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This unit uses one TSAL6100 IR/LED emitter from Digi-Key. This IR diode has a narrow (10 degree) radiation pattern at 940 NM. It is driven via 2n2904 transistor for maximum current pulses. The detector is a Vishay TSOP4838 38Khz integrated receiver module.....
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The lights seem to dance in time with the music. Line-voltage lamps of about 40 to 100 W do nicely. The current for the lamp is from an SCR. When low-level audio is present across Tl, SCR1 is not triggered into conduction. A louder signal, however,....
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Its a simple circuit of 12V DC to 120V DC converter. The circuit consists of two phases first phase of the investor base and then a rectifier and filter stage. IC1 NE555 is wired as an astable multivibrator operating at a frequency of 100 Hz and can be....
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The circuit is based on the IC1 that is 555, for the creation of alternate flashes from the two led D1-2, that can be also different colour. The frequency of alternation can be regulated from the trimmer R3 and from the C1, if changes his capacity. The....
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The circuit given here is of a very useful and accurate digital voltmeter with LED display using the ICL7107 from Intersil. The ICL7107 is a high performance, low power, 3. 5 digit analog to digital converter. The IC includes internal circuitry for seven....
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When designed with general purpose small-signal transistors, the bandwidth is 50MHz to 250MHz so very careful grounding and power supply decoupling is required. Simulation schematic for 2 transistor buffer. *Copyright Poul Petersen 2009 * *Some standard....
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A bridge circuit is used to produce a signal from the output of vacuum sensor IC1. IC2b provides about a 0.2 V offset ..
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This application note features 8-, 10-, and 12-bit data
acquisition components in various circuit configurations.
The circuits include battery monitoring, temperature sensing,
isolated serial interfaces, and microprocessor and
microcontroller serial and....
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The electronic circuit in the VOX Box consists of three parts: a microphone preamplifier, a Schmitt trigger, and a relay driver. Input signals (MIC INPUT terminals) to the microphone preamplifier (Ul) are amplified and fed to a THRESHOLD control (R8). When....
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This section covers Compact Flash, Flash-ATA and hard disks. For other media see DATA LOGGING TO RAM CARDS, page274, and DATA LOGGING TO FLASH AND RAM CHIPS, page279, With this module you can quickly build tailor-made data collection systems with removable....
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Its a very easy interface to build an requires only a few £/$ worth of components. A you can see by the picture on the right, there`s not much to it. To be honest, the pictur is misleading. This hamcomm interface has an added `extra` facility. The original....
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For proper operation, circuit ground must be connected via a small value, high voltage-rating capacitor to one side of the mains supply socket. The "Live" side is the right one. The purpose of this circuit is to animate shop-windows by means of a capacitive....
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Integrated AF power amps have seen great improvements in recent years offering improved power and easier use. The TDA1519C from Philips contains two power amplifiers providing 11 W per channel stereo or 22 W mono when the two channels are connected in a....
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To create the two laser guns for our game, we wanted to mount red lasers into some kind of modifiable toy guns that players could hold and shoot with. Fortunately, we found small red lasers from Fry`s that the target photocells can consistently successfully....
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As some of you know, the Traynor YBA-1 is a very close derivative of the classic Bassman/JTM-45 circuit. I recently picked up a spectacularly clean `67 copy that was all original with the exception of a rather "crappy" fully reversible master volume mod and....
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A simple function generator. Just to generate a certain frequency. While waiting for the AD9832 chip to arrive, I came up with a very simple version of the DDS synth, using just the 2313 and a resistor network. It`s controlled over RS232 from a small Windows....
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The elements diameter of the antenna may vary between 5. 8mm and the dipole diameter may vary between 8. 12mm (12mm recommended) without the need of changing anything to the length or spacing. All elements except the dipole are electrically connected to the....
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Those pickups go to their own volume controls that are push/pull so I can coil tap them, and then onto a 5 way switch before going to the jack. To make it slightly more complex though, I`d like to put in a switch that determines whether the bridge is on or....
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A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist`s workbench. This circuit is not an absolute novelty, but it`s simple, reliable, "rugged" and short-proof, featuring variable voltage up to 24V and variable current....
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A 1000 Watts Audio power Amplifier circuit for my outdoor use so I dont have any circuit diagram so if your having it then plz. its very urgent somehow I want to build it, its my passion, building an amplfier of high power..
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The circuit was designed to create a line preamplifier by acquiring the use of double triode tubes. The circuit comprises of three parts, the main preampl....
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This simple and cost-effective ding dong electronic doorbell circuit is based on IC 8021-2. The IC has an in-built circuitry to produce ding dong sound each time its pin 3 is pulled low. The sound is stored in the IC as bits, as in a ROM. The sound output....
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Anyone who has ever dealt with construction of low-voltage-fed inverter realized that this is no easy task. The shrinking supply voltage decreases rapidly transferred power and efficiency. Samokmitající converters fail to provide sufficient power to drive....
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Shown for the high-precision, high-impedance instrument OPA2111 amplifier configuration. Total voltage circuit illustrated magnification Av = 10 (1 + 2R2 / R1) = 1000 times. A gain stage 10 of the differential amplifier circuit is to expand the....
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DC brush motor driver circuit diagram MC33035 chip using a straight debate brush motor driving circuit ring shows a typical DC brush motor driver circuit diagram. 4 field effec..
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The Intan Technologies RHA2116 16-channel integrated amplifier array requires only three external resistors (to set amplifier bandwidth), two capacitors (to smooth power supply), and one square centimeter of board area. Intan Technologies digital-output and....
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This project consists of a small, portable DJ mixer powered by a 9V dc external supply adaptor or from a 9V PP3 battery. The mixer features two stereo phono inputs and two stereo line-level inputs and has one stereo mixing channel. A microphone input and a....
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For all of the following tests, we used a high quality signal generator from BlackStar. The PicoScope trace below shows a pure 1 kHz tone from the signal generator. Please note: although the screenshots below show the THD, SFDR and SINAD measurements in a....
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The LM324N is one member of the LM324 family,this family consists of four independent, high gain,internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of....
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Track occupancy detectors are needed for hidden yards and other sections of track that are hard to see, but they are also necessary for block operation. The circuit described here uses an LED to indicate track occupancy for digitally controlled MG¤rklin HO....
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This converter has a central component, the CMOS 4047, and converts a 12V DC voltage to 220V AC voltage. 4047 is utilised as a astable multivibrator. At pin 10 and 11 we find a rectangular symmetrically signal which is amplified by tow Darlington transistors....
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This single IC circuit which is based on the Wien Bridge Oscillator, produces low distortion sine waves in the range of 15 Hz up to 22KHz in two ranges. The two output voltage ranges are from about 0-250mV and 0-2. 5Vrms. The image to the right shows an....
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The RF amplifiers use noiseless feedback through the drain-gate capacitance with an inductor in the source lead to provide the necessary 90 degree phase shift between gate voltage and channel current. The first RF amplifier gives about 4dB gain with a noise....
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Mic Amplifier schematic diagram. This circuit has been tried on three microphones, one from SONY, and then two Chinese, everything works! With the correct assembly of the device starts to work immediately, and does not need tuning. ..
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This is a low cost circuit diagram for the emergency light based on white LED. Component: LM317 IC, Resistor, Transformer, LED, Variable ....
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An idea came to me while watching the waves coming in from Malaspina Strait during a storm a couple of weeks ago. What if a person could hear the sounds of ocean waves as an audio recording Not the sounds you`d hear while walking on the beach, or even under....
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The IEEE standards for so-called "high power-over-Ethernet" (HPOE) have yet to be resolved, but most designers expect a 53 VDC source, usable current from each line of about 750 mA, and a total cable resistance of 12. 5 ohms. If you design for what will....
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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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