200 Watt DC-DC PSU

**eCar™** · 05-21-2004, 02:40 PM

Originally Posted by STI_FFY

Yes, the ITPS senses ACC going active, gates it's output, then delays about 4-5 seconds before pulsing the power switch of the mobo. The input power to the DCPS (and its 5VSB output) will be stable before this occurs.

Sorry I misunderstood your concern.

OK, the more I thought about it, the more I realized that it must be doing that or I'd be seeing a bunch of posts complaining about it.

**morgant6911** · 05-21-2004, 06:44 PM

I might get one of these. If you do the "Car mod" mini-itx lists, will you need an ITPS or could you build or buy a cheap shutdown controller?

**STI_FFY** · 05-21-2004, 08:50 PM

Originally Posted by morgant6911

I might get one of these. If you do the "Car mod" mini-itx lists, will you need an ITPS or could you build or buy a cheap shutdown controller?

ITPS is two components in one.

Using it to regulate the input DC for the PW-120-M is not a good idea because the regulator is only capable of 5 Amps (60W total). If you *did* use it, it's output is 12V or less depending on input (never more) so there'd be no point in modifying the PW-120-M to allow its input to go above 14.5V. That's what the "car mod" does.

ITPS is also a startup/shutdown controller, and it's not terribly expensive - but any suitable startup/shutdown controller would suffice.

**Rundell** · 05-21-2004, 09:09 PM

Jim, Thanks for the help! Hopefully I will get this set up by tuesday. I'll let everyone know how it went, if my cable is working (Have to use the pc at the work site right now

)

Thanks a Bunch!

Tim

**Rundell** · 05-22-2004, 06:57 AM

Just to let everyone know he is doing another auction for the 200W PSU
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3482482578

**Rundell** · 05-22-2004, 02:20 PM

Wanted to share the new diagram I made with everyone. Have to draw it, otherwise I may hook it up wrong.

**Deadnick** · 05-22-2004, 02:27 PM

What is a good ITPS, I'm doing my car computer this weekend and want to get one for it to hibernate the system. Also can I build a bypass switch to keep the computer on even if the ITPS goes offline? I want to be able to run my computer with the car off on occasion.

Thanks.

**STI_FFY** · 05-22-2004, 02:57 PM

Originally Posted by Deadnick

What is a good ITPS, I'm doing my car computer this weekend and want to get one for it to hibernate the system. Also can I build a bypass switch to keep the computer on even if the ITPS goes offline? I want to be able to run my computer with the car off on occasion.

Thanks.

ITPS is the name of a particular manufacturer's product (not a generic device name). You can see it here on page 13,14,15. You should right click that link and "save as" rather than open it directly.

You can buy one here.

The solution to using it with the ignition off is to simply provide a switch to the "acc" input (provide 12V at the ignition sense terminal).

**Rundell** · 05-22-2004, 03:04 PM

I'm using one from Ituner Networks. Haven't got it hooked up yet though, I think a lot of people use it. You should be able to set your system to hibernate when the system board detects a turn off signal. I'm on XP Pro and I have that option under the control panel, in power options and the advanced tab.

Edit: Jims way to power up your system when car is off Sounds better

Edit Again: Deleted what I said about powering the computer with the car off. The more I thought about it the more problematic it seemed to me.

**STI_FFY** · 05-22-2004, 03:04 PM

Originally Posted by Rundell

Wanted to share the new diagram I made with everyone. Have to draw it, otherwise I may hook it up wrong.

The 1N4001 goes between the relay's armature winding pins (numbered 85 & 86 in your drawing). The cathode (banded end) goes to relay pin 86, the anode (unbanded end) goes to pin 85 (ground).