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hnwqf
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樓主  發(fā)表于: 2010-10-22 09:02
我有一臺流量計，輸出的低電平0.8V高電平是8V  但是PLC需要的輸入是要求大于20V，  請問(wèn)有什么辦法把8V的電平提升到20V以上
mayanheng
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1樓  發(fā)表于: 2010-10-25 17:55
底電平0.8伏，三極管就導通了吧？。還有干擾問(wèn)題。最好用施密特觸發(fā)器

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