kai asked in 科學其他:科學 · 1 decade ago

光二極體電路?

大家好,我想要做一各電池式的LED,但是要有一各功能就是有光

的時候不亮沒光的時候發亮,不知道用光二極體要怎麼做到反向讓LED有光的時候不亮沒光的時候亮???

基本我用的都基本元件

2 Answers

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  • Jack
    Lv 7
    1 decade ago
    Favorite Answer

    http://www.circuitstoday.com/light-activated-switc...

    有光的時候不亮沒光的時候發亮 電路圖

    Adjust POT R1 to set the desired light intensity for switching therelay.For this illuminate the LDR with the desire intensity light.Therelay will be either on or off.Adjust POT R1 slowly so that the stateof the relay changes.That’s it.Now the circuit is set for the givenintensity of light.調整可變電阻R1 , 可以控制光線的強弱臨界值啟動繼電器, (繼電器不用接直接點LED即可)

    Assemble the circuit on a good quality PCB or common board.(建議採用PC板組合零件)You can use either a 12 V battery or a well regulated & filtered 12V DC mains operated power supply.(電源部分可以用12V電池, 或者是經過穩壓的12V電源供應器)The pin 5&6 (Balance & Balance/Strobe ) of IC LM311 are shorted to minimize the chance of oscillations.(如果用LM311 IC 5和6兩支腳必須相連接, 避免寄生震盪)

  • 1 decade ago

    用OPA將光二極體轉換成電壓信號,再利用電壓比較器去做判斷即可。

    Source(s): 本人經驗
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