Quote Originally Posted by financecatalyst View Post
Thanks for the heads up. I am very short of space, heat sink is not a possibility in that space.
A capacitor power supply creates heat at ligh line voltage. Burning this heat in a zener or a transistorit is still heat.

Can your micro measure the differente between 110 and 220? There may be a way!

220 60hz is 20% hotter than 220 50hz.