The long-distance body heat probe circuit

Published:2011/8/17 22:32:00 Author: | Keyword: long-distance, body heat probe | From:SeekIC

The probe is fixed with the P2288 infrared heat sensor which is produced by Hamamatsu Corp. The device has two modes which are aim detection mode and still detection mode, its detecting range is 100m and it doesn't react to the constant heat. The heat sensor PYR1 outputs signal to the input terminal of IC1, of which the magnification factor of IC1-a is about 2500, the frequency reaction is 0.1~10Hz, then the signal output by IC1-b is magnified by 40 times by Q1. The output of Q1 is sent to the outlet of AC voltmeter by C11, so the millvoltmeter can be inserted and read out the signal power value.



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