auto power off Inverter

**heezer7** · 05-08-2004, 02:37 AM

Am am going to most likely end up using an inverter for my car setup even after seeing all the reasons not too on here. It might not be perminant but i don not have the money to shell out right now. Also running a 1700+ XP b/c that is what i have extra lying around. Well, anyways, is there a way to make the inverter auto power on and off with the car? I don't car about hitting a button to turn the computer on and off. I just do not want to be at work an hour drive from my house to come out to a dead battery b/c i didn't flip the inverter off. Is there any designs to build such a thing floating around. Thanks for any help and this is an awsome forums. Good goole result!

Jon

**john1701** · 05-08-2004, 03:09 AM

Dont know about auto shutdown, but i am interested. The way I have mine wired is a 350w inverter. I cut the switch from it and wired the pos wire from the switch, not the pos wire to the battery, to the ignition key. This elimiates flipping a switch to turn on and off the inverter. And eliminates dead battery since switch is wired to the ignition key.

**CoCa** · 05-08-2004, 04:09 AM

Its as simple as wiring a relay into your supply line to the inverter and having the realy switched by something on the ACC line like the cig lighter.

**john1701** · 05-08-2004, 04:13 AM

I think he is looking for a delay shutdown.

**cybermob2** · 05-08-2004, 12:11 PM

put a relay on your 12v line, switched by BOTH the ACC line AND your 12v rail (diodes on both lines). ie when ACC and/or PSU are on, you have power, and it will only turn off whne they are BOTH off.

again, not the best setup, but it works.

**heezer7** · 05-08-2004, 04:39 PM

Wow thanks for the replies. The delay is optional. I just want to be able to be absolutly sure it is powered off when i leave the car and not have to worry about it ever. Don't want to be looking for help when stranded. cybermob2, I like your idea. I am not thre greatest at car or any above simple electronics but what you are saying makes sence. I will look in to this. Also, I have seen things about grounding the inverter in different ways. What is the best way to do it to eliminate noise? Man i wish I had more money to do this with a lower powered PC and opus PSU. This will be a nice test to see how much i like it and will invest in the future. Thanks for all the help!