Automatic Controller Circuit of Amplification and Exposure Time

Published:2011/5/29 1:35:00 Author:Joyce | Keyword: Automatic Controller, Amplification , Exposure , Time | From:SeekIC

As shown in the figure is the automatic control circuit of amplification and exposure time . This circuit constitutes of step-down and rectifier circuit, monostable timing circuit and relay control circuit etc.The monostable timing circuit is composed of IC (555)、photosensitive detection head R0,and capacitance C1 ~ C4 etc. The length of timing depends on the time constant of the charging and discharging circuit.R0 is the photoconductive resistance. To stir the switch K2 will have four speed gears of exposure mode, 1, 2, 3 are automatic control, whose possess 3 kinds of exposure:” bright , normal and dark ,while 4 presents manual control.



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