Engineer-Joe posted:
Switch should be fine; it's just the eBay seller's own diagram does not match his photo. I'd do what cjack suggests. I think cjack's diagram needs to be corrected to show the 1N4003 diode facing the other way. Also, note that the 10k resistor should be of the 1 Watt rating. Most guys have a stash of only 1/2 Watt resistors so if that's what you have then, say, two 1/2 Watt resistors of 5.1k or 4.7k in series would work. It can be a chore to buy just one 1 Watt resistor mail-order or wherever.