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月澤
時(shí)間嘛！就象乳溝，擠一擠總歸還是有的！
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樓主  發(fā)表于: 2014-03-24 22:27
只要 區分好 NPN輸入型和 PNP輸入型  

是否還有其它要求呢？  
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apprentice0
三個(gè)臭皮匠頂一個(gè)諸葛亮。學(xué)無(wú)止境，共同進(jìn)步。
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1樓  發(fā)表于: 2014-03-26 12:12
高速計數器計數頻率遠高于接近開(kāi)關(guān)頻率，只要接近開(kāi)關(guān)頻率達到你設計要求就可可以
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