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inner flash circuit of camera

2017-02-05 06:18  
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inner flash circuit of camera
The circuit is formed by light metering circuit and flash circuit,just as shown in picture.It is suitable for POPTICS (a popular integrated camera), Franka X-500, WIZEN-860S and so on.It consists of the following circuit:(1)VT1,VT2,light metering device RG (using cadmium sulfide CdS photoresistor)form the light metering circuit. (2) VT3,C1,T1 form the inductive three-point type oscillator circuit to complete the transformation:low-voltage DC → high-voltage AC → high-voltage DC,and provide the flash with power. Component selection: VT1, VT2 use C945-type transistor;VT3 uses D965-type transistor.