The print timing exposer circuit

Published:2011/8/23 22:06:00 Author:Borg | Keyword: timing exposer | From:SeekIC

When S1 is pressed once, the low LEV triggers the single stabilizer, YF555 3-pin is outputting a high LEV, the triode V is conducting, the relay is power-on, the contactor is closed, the exposing light H is glowing and the exposure is done. At the moment, LED1 is put out. LED2 is glowing, which means the exposure is going on, after the time of T, the single stable trigger is reset, the 3-pin of the time-base circuit is turned into LEV again, and an exposure is done. By pressing key S1, the above work is repeating once.



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