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51问答网 > 20颗LED怎样配阻容降压如题谢谢了

20颗LED怎样配阻容降压如题谢谢了

接220V电的！有高手指点一下！要多大电容电阻

2025-03-16 15:56:24

推荐回答（1个）

回答1：

如果把20颗LED全部串联起来，用0.22的降压电容配1M的泄放电阻，在整流电路后串一个10Ω的限流电阻就可以了，如果再加一个耐压高一些的滤波电容会更安全。

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