OK, now that I've got my monitor working like a champ, Now I would like to figure out how to convert the 12v, to 8.5volts.... I've got a PS2 slim and it's got an external ac adapter for the plug, but I can plug 8.5volts DC directly into the back of the PS2. I also want something that will take the 12v or 14.4 or whatever the battery will put out and still keep the output 8.5....

Same concept as before with a voltage regulator? Electricity is NOT one of my specialties….

 

i am not an EE, but here's what i do know:


if you know the imput impedence of the PS2, then you can design a voltage divider with some simple resistors:
http://en.wikipedia.org/wiki/Voltage_divider

or what i would to: just plug the 12V directly in to the PS2, chances are (though i don't know for sure) that the PS2 has a voltage regulator in it so it will accept a large range of voltages and internally convert it to what it wants.

 

Hey Allen, go right back to that site that edikp pointed you to for the 7805 info.

http://www.tapr.org/gps_pwrsup.html

Check the schematic below the 7805 circuit for info on a LM317 based supply. The LM317 is an adjustable regulator, you can set it's output for most anything you want.

The spec sheet for the 317 is here.

 

the spec sheet doesn't want to work for me....

 

hmmm... Okay, let's try it this way...

• Head to http://cache.national.com/ds/LM/
• Scroll down about 1/3 of the way until you see "LM317"
• Click on "LM317.pdf"

Did that work?

 

Yes it did but..... I just found a PS2 slim car adapter for $12 so I think I'll go that route....


Thanks guys!