Shorting Ignition Input With 12V On M4-ATX

**Madboy** · 06-12-2009, 02:20 PM

hi

i got my m4 psu in p1 mode
i want to make a switch that shorts the +12v input line with the ignition input line on the psu ( to be able to keep the pc on the ignition is off )
i got an electronic switch that can do 3A at 250vac or 6A at 125vac ( doesn't says anything on vdc )

i wanted to know if my switch can handle the current that will go through that line?
or in other words , how much current does the ignition line in the psu consumes? any chance that line will get the current my pc consumes?

thanks in advance ,
Madboy

**Curiosity** · 06-12-2009, 04:18 PM

The ignition line only senses voltage. It uses less than 20mA so that switch will be more than adequate.

**Madboy** · 06-13-2009, 05:14 AM

great
thanks man

**pyr0** · 06-13-2009, 05:23 AM

if your planning to have it so that there is no timer or the like so that the PC can be left more or less indefinitely on while no key is in, I would recommend getting an Ultra Bright LED, or something similar rigged in next to the switch, for the 40cents or so it might save you some battery down time from forgetfulness.

**Madboy** · 06-13-2009, 06:23 AM

im using it for gas filling and such so no worries there

its actually going to be a 3 mode switch - acc ( ign ) , off , on
most of the time it will be on acc
when im filling gas or going to a store for a couple of minutes ill leave it on on
and off is for special occasions