/diy/ - Do It Yourself

Why do LED's keep shining?:

I've made a lamp with a 12v power source from a router and a 12v led module. To switch it all I used a small toggle switch rated 250v 3A, the switch is placed at the high voltage side so the power source doesn't drains energy when the lamp is off.

The problem is, when I turn it off, LED's keep shining, but very slightly, almost unnoticeable if you don't see it in complete darkness, if you touch the wood or the LED's the brightness increases a bit.

I wonder if the 230 v AC are enough to jump the air gap of the switch and use some energy, maybe the cable induces some current to the transformer.

This is quite strange, is this normal?

Pic related is my setup.