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Technical Article

Can an LED be connected to Mains power with only a resistor in line?

Time:2019-04-12 16:17:07 Click:

Actually, it depends entirely on what you’re intending to do. There are two various LED usages that we should consider:


  1. As a power indicator—Yes! The current only need 1–2mA without diode;
  2. To give out light—No! The current need at least 20 mA. Meanwhile, diode rectification is also needed in the circuit to prevent the LED from burning reverse.



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