This circuit is useful in liquids level or proximity detection. It operates detecting the distance from the target by reflection of an infra-red beam. [more]
Here is a simple tester for checking the basic operations of an infrared remote control unit. It is low-cost and easy to construct. The tester is built around infrared receiver module TSOP1738. Operation of the... [more]
circuit from:http://www.extremecircuits.net/2009/07/220vac-operated-remote-tester.html
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
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
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
Men in particular enjoy the convenience of television remote controls – often to the annoyance of their female partners. Men apparently want to know what they’re missing when the TV is tuned to a particular... [more]
circuit from:http://www.extremecircuits.net/2010/04/ir-infrared-detector-circuit-diagram.html
The infra red radiation is a region with bigger length of wave from the visible spectrum. [more]