Description: Single-chip programmer generally need 5 volt and 12 volt power of two, 12-volt power supply is used by Flash programmer. 5 V power supply can be obtained directly from the USB interface, 12-volt power supply can be used to produce MC34063, enter 5-volt, 12 volt output. Circuit is simple, no need to debug, or stability. I made the programmer to use this method, the effect of good
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