Popular Circuits Page 180
- Page 180
-
As shown, (a) for the three-phase step wave inverter output transformer winding connections; (b) in FIG its output waveform. ..
-
-
FM Booster, Active FM Antenna Amplifier This FM booster that can be used to listen to programmes from distant FM stations clearly. The circuit comprises a common-emitter tuned RF preamplifier wired around VHF/UHF transistor 2SC2570. (Only C....
-
The JavaBot1 is a small line following robot designed to follow a black line drawn on a dry erase board. It is designed to follow very tight curves. The software still has lot`s of room for improvement but works well as is. The JavaBot1 uses 2 Cirrus CS-70....
-
The described device is used to convert the digital signal format S / PDIF (AES3) to analog. It can be used for any device with uncompressed digital audio output (desktop CD or DVD, minidisk, sound card PC CD-ROM). Separate transmitter can improve the signal....
-
This JDM programmer works with a RS232, 9-pin(9 wire) DB9 Serial connector on your computer, and is used for loading Source Code (hex files) into your microcontroller. JDM programmers are Cheap and very easy to make. JDM programmer that we are going to make....
-
-
-
A simple and high quality FM transmitter circuit designed based on the BA1404 IC .This FM transmitter circuit can be operated from a 3 V battery....
-
The figure is zero and span adjustment circuit includes a feedback resistor network and differential pressure sensing..
-
A 741 op amp is used with 100% ac and dc feedback to provide a typical input impedance of 1011 ohm and unity gain. To avoid hum and rf pickup the input leads should be kept as short as possible and the circuit should be mounted in a small grounded case.....
-
A typical circuit at 20 MHz is shown. The crystal, which has an internal series resistance Rs of 14ohm, oscillates at its third harmonic. The diode clamp Dl and D2 provides a constant amplitude control. ..
-
This is a design schematic to sensor the electromagnetic field. This circuit is based or built by 741 IC. This IC is an op-amp. The circuit can detect the field even hidden wrings. This is the figure of the schematic. A 1mH inductor is used for sensing the....
-
-
4 Stage FM Transmitter This is the FM transmitter circuit which apply 4 radio frequency stages, that are a VHF osci Wholesale fmuser CZE CZH FM Transmitter,Fm Transmitter % FM Radio Transmitter for sale ?czhfmtransmitter,OEM ODM Low Power Fm Transmitter....
-
The Project Long Range Remote Control can be used to remotely control a number of Electrical or Electronic Gadgets connected to it. Unlike Infra Red remote control, this Project employs FM transmission and Reception, and hence it can be used for....
-
The induction receiver shown below is very sensitive and can serve a variety of purposes. It is excellent for tracing wiring behind walls, receiving audio from an induction transmitter, hearing lightning and other electric discharges, and monitoring a....
-
Portable Mic Pre-amp 2 transistor using BC549C, BC547B The electret condenser microphone or microphone`s dynamic range contains a very sensitive....
-
To safeguard portable, emergency power repeaters from reverse or excessive voltage, Dl prevents incorrect polarity damage, and zener voltage determines the maximum voltage that will reach the rest of the circuitry..
-
The two circuits below illustrate generating low frequency sinewaves by shifting the phase of the signal through an RC network so that oscillation occurs where the total phase shift is 360 degrees. The transistor circuit on the right produces a reasonable....
-
The RFID technology is fast penetrating the automotive market with the passive keyless lock application which will soon replace the remote control used to open or close the doors of the vehicle ..
-
I want to make an FM jammer so I can play whatever music I want through my school bus radio. (It`s legal where I live :3) Can someone help me with....
-
LEDs simply react a lot faster than conventional bulbs Light dimmers for common bulb based lighting have been around for ages. The most common implementation of such....
-
This flip-flop circuit is a free running/astable multivibrator one, with bases and collector of both emitter biased transistor are directly coupled to each other. Switching action is supported by means of capacitor in each emitter circuit. This configuration....
-
-
There is no PCB since there are no components to mount on one. the object was to create a source of Ultr Violet light as fast as possible. The UV tubes I bought from a lighting shop for use with handheld battery lamps using 4-watt tubes. the tubes are white....
-
-
-
-
The RF oscillator using the inverter N2 and 10. 7Mhz ceramic filter is driving the parallel combination of N4 to N6 through N3. Since these inverters are in parallel the output impedance will be low so that it can directly drive an aerial of 1/4th....
-
No problems turning it on, but after I unload the input (no input current), the triac doesn`t turn off. The load is standard RS-232 voltages (+/- 12V), speed 56k. You mentioned you have already tried using an OptoTriac, so the schematic of how you connected....
-
Charging apparatus shown in schematic circuit, the maximum output current of 20A, the maximum charge voltage of 80V. It can be adjusted from 0V onwards, and therefore capable o..
-
1 kHz is a commonly used test frequency, and I resolved to see if I could make an inductance meter that uses a 1 kHz test signal at a low level. I also wanted to use a low level test signal so that the test current would have a minimal effect on the....
-
DC motor (brushless DC motor) double-loop speed control system, the speed controller output torque (or current) signal given. It can be used TL494 as a current regulator and cu..
-
A design example for a portable data acquisition system is offered that greatly simplifies the circuit design task. A reduction from seven components down to three components is accomplished with a design that has lower system cost, faster time-to-market,....
-
The affection of the ability accumulation is a Tamura 3FD-410 5V bifold primary/dual accessory transformer. These are accessible from DigiKey. com for reasonable prices. Normally, the transformer`s primary windings would be affiliated in alternation for....
-
-
-
Here is the program to control simple servo motor in both direction. I test it today and think that i should also share it with you people so that you can also enjoy and can takebenefit. This program will rotate servo motor in both clock wise and anti clock....
-
-
Low distortion bass and treble control for amplifier. Circuit diagram. Electronics projectt....
-
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....
-
The circuit we are going to discuss here is a four siren sound generator using UM3561 IC which is a low power CMOS IC. The four different sounds can be produced by pressing the switches S1, S2 and S3. The circuit can be used for any type of sound generation....
-
CMOS Pocketable Timekeeper is pocket size time circuit circuit diagram of CMOS Pocketable Timekeeper and various other timer project advanced timer and electronics project...
-
-
The logic diagram of the CD4538BC Dual Precision Monostable is shown in the following schematic diagram. This IC such a dual, precision monostable multivibrator with independent trigger and controls, according to the datasheet. This CD4538BC IC features wide....
-
HIP6301 HIP6601 3 CPU function CheckPlobj ifobj.saytext.value == "" alert " e"; obj.saytext.focus; Using HIP6301 and HIP6601 chip 3-phase CPU power circuit..
-
Fantasy lights, wonderful changes can be used to store, dance hall or family holiday decorations. Its control circuit is shown. Lantern multivibrator control circuit, a control..
-
-
Although the Audionics CC-2 is named after Cliff Moulton (Audionics` chief engineer) and Charles Wood (Prez of Audionics), as usual in the business world, the principals in the company masked the identity of the real creator - Bob Sickler, whose name appears....
-
Simple interconnection of RS7490 decade counter RS7447 decoder, and 7-segment digital display for each desired digit makes ideal counter for classroom demonstrations and Sci-ence Fair exhibits, With two additional stages added, display reaches 9999 before....
-
High Voltage Stun Gun Disclaimer: As i have seen before, IT IS NOT A TOY, DON`T DO ANYTHING STUPID WITH IT. I DON`T ACCEPT ANY RESPONSIBILITY OF DAMAGES DONE TO OTHER PEOPLE OR YOURSELF WITH THIS DEVICE. IF YOU WANT TO BUILD IT YOU MUST ACC....
-
This is a combination digital clock timer and solar panel charge controller used to maintain a deep cycle battery from a solar panel. The timer output is used to control a 12 volt load for a 32 minute time interval each day. Start time is set using 9 dip....
-
The DS protocol was designed to provide firmware-based bidirectional host-to-slave inter processor communications for situations in which no hardware solution is available and the host and/or the slave in incapable of tending the interface in real time. The....
-
If you choose to make your own moisture sensor,; this foil pattern should come in handy. A sensor connected to J1 causes S..
-
A programmable code lock can be used for numerous applications in which access to an article/gadget is to be restricted to a limited number of persons. Here is yet another circuit of a code lock employing mainly the CMOS ICs and thumbwheel switches (TWS)....
-
This Programming interface circuit sends the programming signals from the USB cable to the FPGA chip directly, through a standardized 10-PIN interface. Technically there are only 4 or 5 signal pins used, excluding GND and unused interface pins from the....
-
-
UHF antenna booster can be used for better reception, especially when you`re far from TV station / relay transmitter. This UHF antenna booster works in 400-850...
-
This is a simple musical alarm circuit that produces a musical tone when water or some conducting liquid comes in contact with the 2 sensor wires provided. The circuit relies on four transistors and one melody generator IC M 3482. When water comes in contact....
-
The new project uses old analog satellite receiver tuners that have to be modified so that the AFC is disabled and the AGC usually set to maximum gain. The output is the 480MHz IF signal. The IF converter can be for example a Satellite receiver with 70 MHz....
-
-
Hello, I am going to try some flat mobile active car atenna`s, with a Terratec Cinergy DT USB XS Diversity digital tuner. The antenna has the....
-
Multipurpose Circuit for telephone. This add-on device for telephones can be connected in parallel to the telephone instrument. The circuit provides audio-visual indication of on-hook,...
-
-
This portable solar lantern circuit uses 6 volt/5 watt solar panels are now widely available. With the help of such a photo-voltaic panel we can construct an economical, simple but efficient and truly portable solar lantern unit. Next important component....
-
The following circuit shows about A933 Transistor Telephone Listening Circuit Diagram. Features: can be tuned from 88 to about 94Mhz, simple ....
-
The normal telephone bell, at times (specially during night when one does not want to be disturbed), appears to be quite irritating. The circuit shown here converts the loud sounding bell into a soft and pleasing musical tone. The incoming ring is detected....
-
This LM12 audio amplifier circuit will provide a high output power on a 8 ohms or 4 ohms load impedance. The maximum output power delivered by this LM12 audio amplifier is around 60 watts on a 4 ohms load and 100 watts on a 4 ohms load on each channel. A....
-
The Biquad consists of two successive integration stages followed by an inverting stage. The entire group has a feedback loop from the front to the back consisting of R1 which is chiefly responsible for controlling the center frequency, ‰o. The first stage....
-
Features automatic weapons such magnetic switch circuit is very simple, reliable, low failure rate, good versatility, can be used to output the performance or can be converted into mechanical displacement of the occasion. (2) is a circuit diagram using the....
-
This DIY 12V to 220V voltage converter is build with CMOS 4047 that is the main component of this small voltage converter that transforms a12V DC into 220V AC. 4047 is used as a astable mutivibrator, at pins 10 and 11 will have a symmetrical rectangular....
-
Fire Alarm Circuit using LDR (Light Depending Resistor) as ablaze sensor. It warns the user adjoin blaze accidents. It relies on the smoke that is produced in the accident of a fire. Back this smoke passes amid a LED and an LDR, the bulk of ablaze falling on....
-
-
Description is not in English language...
-
APM-81 lift the main circuit, the safety circuit and brake circuit: ..
-
This circuit provides a means of detecting the presence of anything by the reflection of infra-red light and provides a direct digital output of object detection. By the use of modulation and high power bursts of infra-red at a very low duty cycle, a....
-
Input current for a passive PFC circuit is insensitive to changes in the output ripple - so it requires a smaller inductance than previous circuits....
-
This design combines power-on and low-battery indication, can operate with any battery voltage up to 15V, has very low current drain (2mA or less) and cos....
-
-
With the impending close down of the 405-line transmitter network those of us with collections of early TV sets are having to make new arrangements to supply them with suitable signals. Whatever the scheme used, some method of converting baseband audio and....
-
IC1 is a switching regulator that generates a 45-kHz signal that drives the gate of MOSFET Ql. Dl, D2, an..
-
The electronic dog repellent circuit diagram below is a high output ultrasonic transmitter which is primarily intended to act as a dog and cat repeller, wh...
-
-
-
The amplifier operates primarily in the current domain. The first stage is a voltage controlled current sink. The second stage is a current-controlled voltage source. The fourth stage is a constant current sink. The main advantage of current domain....
-
The two circuits below illustrate using the 555 timer to close a relay for a predetermined amount of time by pressing a momentary N/O push button. The circuit on the left can be used for long time periods where the push button can be pressed and released....
-
Circuit works: The temperature stabilizer from the main oscillator DD1.1, C1, R1, R2 and VD1, monostable multivibrator R3, VD2, VT1, C2, R4, DD1.2, R7, R8, thermal resistors R5, R6, inverter DD1.3, strobe oscillator DD1.4, R11, C4, triac circuit VT2, T, R12,....
-
The first thing to do is to take notes indicating which wire connects where on the 36 tube socket. Remove all of the wires connected to the 36 tube socket. Then, drill out the rivets holding the five-pin 36 tube socket in place, and remove the five-pin 36....
-
I don`t know why, but people like blinking lights. You see LED chasers everywhere, in TV shows (Knight Rider), movies, and store windows. This schematic is my version of a simple 10 LED chaser. There is no 555 timer used because at my local electronics store....
-
Just to prove that transistors can also be useful in logic situations; this is a data latch and indicator which also is a data switch and has a bidirectional input/output port which can be read or switched. If the second transistor is off, a small currrent....
-
Power Supply in this article use a regulator that is composed of 2 pieces of NPN transistor. A transistor acts as a power regulator and a transistor again serves as a controller output voltage. Power Supply has an adjustable output with a range of 6-12 VDC.....
-
This is an application of what`s known as "random fire" technique for full phase control. The term random iskind ofmisleading. Dimming cannot be effected bytriggering the gateindiscriminately;triggering (firing)must be done synchronised with the line....
-
Moderately priced Passive Infrared PIR Sensor modules are now widely available. By using these readymade and pre-configured PIR sensors, even an average el....
-
As shown in FIG TDA6103Q test circuit with feedback factor is 1/150. Input signal Vi1, Vi2, Vi3 through the input resistor network consists of capacitors into the TDA6103Q 1,2,3 feet, 2, 3 feet and 5 feet are inside the differential input stage of..
-
-
The following construction of low-frequency harmonic signal generator was necessary for debugging and measurement of audio amplifiers and other circuits,....
-
A1 and its associated components furnish an amplitude stable sine wave source. All positive feedback path is a Wein bridge, tuned for 1.5 kHz, Ql, the LT1004 reference, and additional components in Al's negative loop unity-gain stabilize the amplifier. Al's....
-
-
Here is a telephone line vigilant circuit to guard against mis- use of your telephone lines. It monitors telephone lines round the clock and provides visual as well as an audio warning (when someone is using your telephone lines) which can be heard anywhere....
-
In an effort to conserve energy, simple shutdown schemes
are incorporated into many battery-operated circuits. Not
all circuits lend themselves to direct control, however, and
instead the supply must be turned off by a switch. The
LTC®1477 high side....
-
A small circuit that can find a lot applications of measurement time. She has the possibility us inform with sound signal from the BZ1. At the same time, exist the possibility drive a external circuit via the optocoupler IC2, after we connect the applicable....
-
This simple and symmetrical free-running generator has a 50- output impedance, a pulse width of 100 ns..