The flashlight with auto dimming function circuit

Published:2011/8/23 22:06:00 Author:Borg | Keyword: flashlight, auto dimming function | From:SeekIC

When the power supply switch K1 is put through, the step-up circuit is charging capacitor C7, when C7 is full, the Ne light is glowing, which means the shoot can be done. The shutter contactor K2 is on, which triggers SCR3 conducting, the flash tube is flashing, C7 is starting to discharge. At the same time, C1 is discharging reversely through stabilizer DW, the backward breakdown voltage drop on the 2 poles of DW provides for the light test trigger circuit with a 6V working voltage, the light test circuit is starting to work.



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