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..

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