Wednesday, July 13, 2011
Also if at all one wants to know the number of people present in room so as not to have congestion. This circuit proves to be helpful.
IR Transmission circuit is used to generate the modulated 36 kHz IR signal. The IC555 in the transmitter side is to generate 36 kHz square wave. Adjust the preset in the transmitter to get a 38 kHz signal at the o/p. around 1.4K we get a 38 kHz signal. Then you point it over the sensor and its o/p will go low when it senses the IR signal of 38 kHz.
Download:Source Code And Full Report:Automatic Room light Control Project
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