Photoelectric shooting automatic acousto-optic target-reporting circuit diagram

Published:2011/6/24 1:27:00 Author:Nicole | Keyword: photoelectric shooting, acousto-optic target-reporting | From:SeekIC

In the figure, VT1 is photoelectric triode(3DU type), there is a light hole in front of it, when the photoelectric gun's light beam hits this window, 3DU tube's photosensitive base surface will produce photocurrent, and it is injected into the base collector, the signal current is amplified, then the photoelectric tube is low resistance, the collector level is dropped below 1/3 power supply VDD, IC1 is triggered and set. IC1 adopts time base circuit 555, the monostable timing circuit is composed of IC1 and R2, C1. Ordinarily, photoelectric tube VT1 is in off state(high resistance), 555 is in reset state; once the photoelectric target is hit, VT1 is turned on and it is low resistance, 555's 2 foot level is lower than 1/3 VDD, it is reversed and set, at the same time, the timing starts. The monostable timing time is td=1.1R2C1.



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