Thread: Carnetix CNX-P1900 Dual Output 140 watt Regulator

Hi guys,

One quick tip with regard to the P1900.

Do not earth the case. This will cause issues with Suspend/Hibernation of systems.

For example, if you screw the case to any part on the car that is earthed it does not work correctly.

Even if I screw it into plastic?

so wait should i not ground it at all? because im having a problem with my P1900 and macpac. it puts my mac mini to sleep beautifully when i turn off the ignition, but after about 2 or 3 minutes the P1900 shuts off, cutting power to my mac. but itll start the mac up again on ignition and works fine. the only thing it wont do is let my mac sleep in piece. it keeps cutting the power. thanks.

EDIT: whoops sorry i had a jumper set wrong. i thought i had them all right. sorry.

I have my unit attached to plastic, however it is grounded through the wiring is this a problem as I am experiencing shut down a few minutes after sleep?

They mention this works with the Mac Mini but why not laptops in general? I've ordered a Dell Mini for my car and it has an input of 19V at about 65W I believe so is there any reason this power supply wouldn't work with my laptop?

Need an adapter of course but assume that's implied.

I can't see why it wouldnt work I will try my macbook on there for you and let you know. Never thought about doing that... Give me a few hrs, or pm me back if I forget to come back on.

hey guys,

I'm having some problems with the hibernation of my mac mini. i've used the ignition from the radio for P1900. I used it all the time without the radio being attached and it worked fine.
Now that I've mounted the radio, the computer won't sleep. only when i pull the power cable from the radio, it goes into stand by.

do u have any idea why this is happening?