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233116216
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樓主  發(fā)表于: 2008-07-18 10:38
      監視45盞紫外線(xiàn)燈的狀態(tài)    一盞不亮就能知道位置��！  呵呵 幫我想想有什么省錢(qián)的方案    
uthman
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1樓  發(fā)表于: 2008-07-19 09:39
45個(gè)取樣電阻45個(gè)三極管45個(gè)指示燈加上一個(gè)24V的電源就可以了
燈亮時(shí),電路構成回路,哪取樣電阻中有1V左右的電壓提供給三極管的基極,三極管導通指示燈亮

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