Here is 6 zone alarm independent circuit. this circuit suitable for a small office or home environment, it can also be adapted to use a combination lock or keypad to set and reset the alarm. All zones Z1 to Z6 use normally closed alarm contacts. Zone 1 is a....

The schematic is very simple for this tutorial. It is just a matter of wiring up the ADXL320 sensor to the PIC and the LED. The power circuitry assumes you have a battery of +5v to power the PIC. You can create your own custom circuitry for this or just use....

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....

This is a simple SCR based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell cut-off and Reset. It`s designed to be used with the usual types of normally-closed input devices such as - magnetic-reed....

Starting from a 30 volt power supply this high voltage converter circuit can deliver a voltage between 0 to 3 kV (version 1) or from 0 to 10 kV (version 2)....

Small and interesting circuit that flashes your head lights. Automotive, head lights, circuit diagram. Built around famous NE555 timer circuit....

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A low frequency test oscillator for testing tone controls and experimenting....

Used this circuit once to track down the location of a plastic pipe, buried underground. It transmits a weak RF signal, which can be picked up by a portable AM radio from about 6 feet away...

Economy radar detector Circuit diagram This circuit uses a 1458 dual op-amp to form a radar detector. C1 is the detector of the radar signal. The first op-amp forms a current-to-voltage converter and the second op-amp buffers the output to....

This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CMOS IC`s and features a timed entry / exit zone, 4 immediate zones and a panic button. There are indicators for each zone a "system....

This LED lamp was originally designed for use on a budget solar-charged 12V electrical system. It is bright enough for comfortable reading at night and fe....

In order to solve the lag and light transition phenomena, it can use the Triac dimming light circuit shown in the figure with dual time constant. The circuit increases R3, C2 resistor-capacitor network, and the reducing charge on capacitor C1 can get....

This Blog show the Different Electronics Circuit Design, Application, Fields and Resources which could help students, engineers, professionals, and common people whose interest is in electronics! For your comments, suggestions, or your looking for a circuit....

The Fluke interface diagram is an example of a typical microcontroller circuit. There is not really much to see, apart from the microcontroller itself. Nevertheless I`ll try to explain what`s happening here, because not everything is as obvious as it may....

This microphone preamp schematic electronic circuit project is designed using the OP37 operational amplifier manufactured by Analog Devices and is effective, fixed-gain transformerless microphone preamp which amplifies differential signals from low impedance....

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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....

A preamplifier circuit suitable for high impedance type electric guitar pickups is given here. The circuit is based on a uA 741 op-amp (IC1). The IC1 is wired as a non-inverting amplifier. The POT R1 can be used as a volume controller. The POT R6 can be used....

The circuit presented here illustrates the fact that in spite of all kinds of new component and technology, it is still possible to design useful, and interesting, circuits. The circuit is based on two well-established transistors, a Type BF256C and a BF494.....

This TDA1514 audio amplifier circuit design electronic project is capable to provide a high audio power output using a specialized audio IC and other few common components. The TDA1514 audio IC is manufactured by Philips Semiconductor and is capable to....

This is the circuit diagram of UHF band TV antenna booster with 15dB gain power. This low cost antenna booster is simple and easy to build. This circuit formed based on BF180 UHF Transistor. The first stage is an band pass filter constructe....

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This handy circuit can be used as a speed controller for a 12V motor rated up to 5A (continuous) or as a dimmer for a 12V halogen or standard incandescent....

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...

Make a 0-25 mA current limiter. I want to take a control voltage of 0-5 V as input and have it control a current of 0-25 mA through a restive load (the restive load may vary between 0-200, it`s represented as R2 below). The O2 op-amp is used to make a....

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Diodes with a low voltage drop, also have a high reverse current (leaking current), this will load the detector circuit heavier, the Q of the detector circuit reduces, and with that also the voltage across the LC circuit. At a lower input voltage the diode....

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....

This article is of interest only to readers whose bicycle lights are powered by a dynamo. The laws on bicycle lights in the United Kingdom are stricter th....

Here is a high performance RF amplifier for the entire VHF broadcast and PMR band (100-175 MHz) which can be successfully built without any special test equipment. The grounded-gate configuration is inherently stable without any neutralization if appropriate....

This circuit will power a 6 inch 4 Watt fluorescent tube off a 12 volt supply, consuming 300 mA...