Start a new topic

How to add a LED light to signal power on /off

How to add a LED light to signal power on /off

At the end, I buy a 470 ohms 2 W resister.
And the overheat problem is solved.
I have a chassis that can add a led light to signal on/off.

I am using SMPS300R 48V 230V power supply that comes with an auxiliary 12V power supply.

If I use a 3v, 20ma Led light, what resistor with how many Watt and Ohms that I need to use?

I Have Tried 130 Ohms / 0.5 Watt resistor but seems to overheat and unstable.



Please advice.
Login or Signup to post a comment