Hello all, I've been reading through some of the posts here, and I think I am just missing something. I'm just getting into eletronics again after blowing the circut breakers in my house when I was 10 trying to make an electromagnet plugged into the wall(I'm now 30, yes I was traumatized) So this is my question, I don't want to use batteries for everything, so I bought a power supply from radio shack 12VDC/1.75A. If I am just making simple circuts with say a 555 and some LEDs, what amount of resistence should I use. I tried to use Ohm's law, assuming 5vdc, but something isn't right. Could someone please point me to a link, or give me a simple explanation, I would be forever in your debt.
Thanks,
Bentov
Thanks,
Bentov