Research of direct control for ADC by serial interface in PC

The article discuses the method of signal input and signal output based on VB6.0 and serial interface,working principle of MAX176 A/D converter,interface circuit for MAX176 and PC's serial interface,and programming approach.Direct control for ADC by serial interface in PC can make interface circuit and control program of ADC become simpler,reliable and cheaper.It is worthwhile to be popularized.