Hi,
I'm trying to accomplish what I thought was an extremely simple task, of putting a capacitor across the atx power switch so it will turn on as soon as power is applied (as the bios does not have this feature).
I do NOT want a 555 circuit or any kind of circuit at all.. just a single capacitor and maybe a resistor to drain it..
I tried 3 different caps as follows:
- 0.01 uF ceramic - does nothing
- 0.47 uF greencap - does nothing
- 10 uF electrolytic - will work the first time power is applied, but nothing after that untill I drain it (remove and short the leads for a few seconds).
What value capacitor should I use ? Do I need a resitor across it to drain it quickly when power is lost ?
I thought it would be a simple thing and the value wasn't important (ie. I could use any reasonable value).
Regards, Chris