555 color photo printing & washing instrument circuit

Published:2011/5/20 8:05:00 Author:TaoXi | Keyword: color photo, printing, washing, instrument | From:SeekIC

As the figure shown, the printing & washing instrument is composed of the temperatrure controller, the washing timer and the timing buzzer.etc. The temperature control range is below 50℃, also it is free to adjust; the temperature control accuracy is +/-0.5℃; the timing time is 2 minutes 45 seconds +/- 1 sec; the heating time is 1 hour. The washing timing buzzer is composed of the IC2 and IC3, there is no need to adjust the time before using. The start timing circuit is composed of the IC2(555) and R5, RP2, C1, the timing time is td=1.1(R5+RP2)C1.



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