A/D转换由串行A/D转换器TLC0834完成，利用TLC0834将模拟电压转换为数字量，经单片机将数字量转换成对应的电压值，并通过数码管输出。-A/D conversion from the serial A/D converter TLC0834 completed, the use of TLC0834 analog voltage is converted to digital by SCM will be converted into the corresponding digital voltage value, and through the digital control output.