Infrared detector circuit

Published:2011/6/28 3:09:00 Author:Christina | Keyword: Infrared detector | From:SeekIC

The infrared detector circuit can be used to detect whether the infrared remote control transmitter device is working properly. The infrared detector circuit is as shown in the figure. When the infrared remote control transmitter outputs the infrared light to irradiate the photosensitive transistor VT1, the resistance decreases to drive the conduction of VT2, so the light-emitting diode VD1 is lighted with the rhythm of the incident light. Because the brightness of the light-emitting diode VD1 depends on the intensity of the infrared light, so we can estimate that whether you can continue to use the battery. Figure Infrared detector circuit



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