I am building a cnc router and want to put all the electronics in a PC case and use the pc power button to power on the 24 pin breakout board. I wanted to use a pc power supply to power some of the electronics and a relay to turn on the other power supplies. I have very limited knowledge of electronics and after looking around I found this sparkfun benchtop power board kit
The problem I am having is that it uses a SPDT switch and I want to use the pc case switch. Then I found this board and thought I could get it to work.
That module switches the hot lead; the power supply board needs a connection to ground to turn on. While I would probably solve this problem by changing the switch on the PC case to a toggle switch (SPST is fine; they are only using the NO contact on the switch), you could follow the Pololu board you used with a FET or relay to allow it to switch the POWER_ON pin to ground.
n1ist:
you could follow the Pololu board you used with a FET or relay to allow it to switch the POWER_ON pin to ground.
/mike
Thanks for the reply. I would like to try your suggestion of using a FET or relay. I know almost nothing about electronics and am not sure how to do it. Could you tell me how I need to wire it up.
