LCD Screen: Does the Accessory wire have to be regulated too?

**nobb** · 09-28-2006, 06:04 PM

Hi.
My carputer project is almost done! My LCD screen just came in this week and all I have to do now is remove my dash and plug everything in (I have everything prewired). I plan on installing everything this weekend, when I dont have any homework. I have done much testing and I am pretty sure this will work. However, my initial designs meant that my LCD screen would run off the 12 volt PSU on my computer. However, I want to run it off the car's electrical system, that way, my screen can still open/close when the computer is off. I already built a 12 volt regulator based on the lm317 chip (for something else) and I would like to use it to regulate the voltage going into my new LCD. My LCD's model is DPI.107B. I think it is equivalent to the MTSVO-SC sold on the mp3car.com store. My question is, if I regulate the voltage powering my LCD screen, does the accessory voltage have to be regulated as well? Is it okay if I just regulate the power in, but not my accessory voltage?

**DarquePervert** · 09-28-2006, 09:30 PM

If the screen requires regulated 12v power (Lilliput), then yes, you'd have to regulate the ACC line.

**nobb** · 09-29-2006, 02:41 PM

But the ACC line only is used for signal. My +12 volt and ground is what the screen is drawing power from.

**Ste_nova** · 09-29-2006, 03:30 PM

i asked this and no one seemed to know

i think the flip out lilli needs power to remeber where to stop too

**nobb** · 09-29-2006, 04:24 PM

Yea I figure I'll use regulated power direct from the car's battery. That way, I can open and close the screen whenever I want. Eg. I want to be able to close then screen when my computer automatically shutsdown.

**jackso11** · 09-29-2006, 04:35 PM

where is the best place to get a regulator from? I have never used one, don't even know what they look like....but I know I need one to get rid of the lines on my screen! haha

oh, I am in the UK by the way.

**nobb** · 09-30-2006, 12:32 AM

You can build your own regulator. If you have installed a computer in your car, I'm guessing you probably have the skill to make a simple voltage regulator. Here is a very helpful tutorial on building a regulator: http://casemods.pointofnoreturn.org/...rial-full.html