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September 27, 2010
Normally home appliances are controlled by means of switches, sensors, etc. However, physical contact with switches may be dangerous if there is any shorting. The circuit described here requires no physical contact for operating the... [more]
September 27, 2010
Firecrackers are normally ignited by using a matchstick or a candle. You have to run away quickly after igniting the fuse of the firecracker. This method of igniting firecracker is unsafe, because the danger of... [more]
circuit from:http://www.extremecircuits.net/2010/05/infrared-fire-cracker-igniter.html
September 27, 2010
This circuit is intended for precision centigrade temperature measurement, with a transmitter section converting to frequency the sensor's output voltage, which is proportional to the measured temperature. The output frequency bursts are conveyed into the... [more]
circuit from:http://www.extremecircuits.net/2009/12/digital-remote-thermometer-circuit.html
September 27, 2010
Many households are still graced by tube-type television sets. If you want to connect one of these large tellies to your stereo system to improve the sound quality, this is usually not a problem because... [more]
circuit from:http://www.extremecircuits.net/2010/05/tv-muter-circuit.html
September 27, 2010
Here is the circuit diagram of IC Controlled Emergancy Light With Charger or simply 12V to 220V AC inverter circuit. The circuit shown here is that of the IC controlled emergency light. Its main features... [more]
circuit from:http://www.extremecircuits.net/2010/01/ic-controlled-emergency-light-with.html
September 27, 2010
Most of the IR remotes work reliably within a range of 5 metres. The circuit complexity increases if you design the IR transmitter for reliable operation over a longer range, say, 10 metres. To double... [more]
circuit from:http://www.extremecircuits.net/2010/05/long-range-ir-transmitter.html
September 27, 2010
Using this circuit, audio musical notes can be generated and heard up to a distance of 10 metres. The circuit can be divided into two parts: IR music transmitter and receiver. The IR music transmitter... [more]
circuit from:http://www.extremecircuits.net/2010/05/ir-music-transmitter-and-reciever.html
September 27, 2010
This circuit adopts the rather unusual Bowes/White emitter coupled multivibrator circuit. The oscillation frequency is about 1Hz and is set by C1 value. The LED starts flashing when the photo resistor is scarcely illuminated. The... [more]
circuit from:http://www.extremecircuits.net/2009/07/dark-activated-led-or-lamp-flasher.html
September 27, 2010
The IR detector (IC3) controls an LM 7555 CMOS timer (IC2) which operates in mono stable mode. When the beam is broken, IC2 is triggered and its pin 3 output goes high for about half... [more]
circuit from:http://www.extremecircuits.net/2010/03/beam-break-detector-for-camera-shutter.html
September 27, 2010
This device was designed on request; to control the light intensity of four filament lamps (i.e. a ring illuminator) powered by two AA or AAA batteries, for close-up pictures with a digital camera. Obviously it... [more]
circuit from:http://www.extremecircuits.net/2009/08/brightness-controller-circuit-for-small.html
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