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The camera flashlight circuit

2017-02-01 03:38  
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The camera flashlight circuit
The camera flashlight circuit when K1 is put through, the self-motivation oscillator composing of BG1, C1, B1 and R1 is starting to work, after being boosted by B1 and rectified by D1, it is charging C2. DW2 makes BG4 conduct when it is 5.6v, the multi-resonance oscillator composed of BG2, BG3, R3~R7, C3 and C4 is getting into working, the 2.5V flash signal is output by the vice contactor, then the indicator in the camera viewfinder is glowing, and the shutter is locked and the 1/60 flash is continuous done. When K3 is pulled in, C7-charged voltage is triggered by R11 and SCR1 is conducting, the flash tube FT1 is also triggered and conducting.