Electronics Workbench Circuit File
Version: 5
Charset: ANSI
Description: 
"圖中的IC2為十進(jìn)制計(jì)數(shù)/脈沖分配器，其輸出端Q0-Q9在輸入脈沖的作用下將一次變?yōu)楦唠娖健?”狀態(tài)。且只有一個(gè)輸出端為高電平。這樣我們降格輸出端有機(jī)的組合。發(fā)光管LED1~LED4即可按一定規(guī)律發(fā)光，當(dāng)用眼疲勞時(shí)眼睛隨著發(fā)光管的亮滅不停地轉(zhuǎn)地，即可達(dá)到消除視力疲勞，預(yù)防近視的目的。IC1為555基電路，與其外圍元件組成脈沖發(fā)生器，作為IC2的脈沖輸入源。二極管D2~D11起隔離作用。LED1~LED4最好選用高亮度綠色發(fā)光管。" 

EncryptionType: 2
UsingVectorGraphics: 0
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