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魚缸水泵自動(dòng)開?？刂齐娐?

2016-11-18 09:40

關(guān)鍵詞：控制電路電路水泵

魚缸水泵自動(dòng)開?？刂齐娐? src="http://files.chinaaet.com/dianlutu/69/6469-1.jpg" style="cursor:hand" border=0>

如圖所示為魚缸水泵自動(dòng)開停控制電路。它采用兩只555時(shí)基電路組成。其外圍電路具有相似的結(jié)構(gòu)，通過交連電容C5、C3形成閉環(huán)。該裝置運(yùn)行有兩個(gè)狀態(tài)：即工作狀態(tài)和間歇狀態(tài)。為了保證達(dá)到每次開啟電源時(shí)裝置處于工作狀態(tài)(即水泵運(yùn)行狀態(tài))，在IC1的4腳有R3和C2組成的復(fù)位電路。此電路最小間歇半小時(shí)，最大間歇3h。按圖中R10給出的數(shù)值，水泵工作時(shí)間為25min～30min。可根據(jù)需要改變其阻值的大小，自行確定工作時(shí)間。

元器件選擇：C3、C5須選用無極性電容。K1用單刀6位波段開關(guān)。其他元器件選用如圖所示。

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