Hi, I want to place a custom LED light indicating the switch position on a extension cord (I know some switches come with alight but I am not interested in that).
My question is:
Do I have to use a transformer to step down the voltage from the 120VAC line and then rectify it, or is it possible to just rectify it to 120V DC and then step it down with a 3W 6kOHm power resistor (assuming 3.3V drop and 20mA current draw of the blue LED)? Eliminating the transformer will save a lot of space which is a constrain, also I understand the LED might flicker at 60Hz rate. I was just curious if this is even possible to wire like that
Obvious alternative would be to use a 120V conventional small size light bulb and paint it blue
My question is:
Do I have to use a transformer to step down the voltage from the 120VAC line and then rectify it, or is it possible to just rectify it to 120V DC and then step it down with a 3W 6kOHm power resistor (assuming 3.3V drop and 20mA current draw of the blue LED)? Eliminating the transformer will save a lot of space which is a constrain, also I understand the LED might flicker at 60Hz rate. I was just curious if this is even possible to wire like that
Obvious alternative would be to use a 120V conventional small size light bulb and paint it blue