如图, 在ADC0804和单片机之间用了光耦, 这个图在proteus里仿真时, 程序没问题, 但是光耦有问题, Proteus里没有TLP521, 用线性光耦或4N25替代时, 均出现原边导通,次边无法拉低的情况, 请大家指点一下我的电路图, 看看光耦能不能这么用。
不知这是我光耦接法的问题还是Proteus的问题? 谢谢大家!
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