[Solved] PS_ON weirdness

I tried to use the PS_ON thingie, to control the PC power supply, but I have a strange issue...
I (temporarily) soldered the green PS_ON wire from the power source to pin 12 on the RAMPS, and this works like a charm: M80 enables the power source, M81 disables it, but....

When I remove the power from the arduino, the power source is enabled. This cannot be the intended behaviour... Did I do something wrong here?

Edited 1 time(s). Last edit at 02/28/2013 07:34AM by sokopok.

I had the same problem. I got arround it by adding a resistor, 4k7 I think it was ( can check when i get home if needed ) on the the ps_on wire. Works faultlessly now.

Thanks man. Works great. I didn't have a 4.7K anymore, so I put a 6.8K on there. Perfect!!!

Glad I could help.