Light-emitting time automatic control circuit

Published:2011/5/15 5:08:00 Author:John | From:SeekIC

The intensity of the light-emitting time automatic control is relative to the signals of time. And this circuit can work under a very small illumination (such as 250mLX). Photodiode adopts FV1 / 4-type elements with an area of F ≈ 9mm2. The operating voltage of 2.7V can be powered in series by two batteries. When it is not connected, the absorbed current is 2μA. The differential amplifiers T1 and T2 both have a high sensitivity and the current of emitter is 1μA. Afterwards, the BCY58 continues to amplify.



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