Uses for 19v output power supplies?
 

Can anybody think of a use for 6 19v power supplies? We took them out of a lightly used sign and hate to throw them away, but nothing else we do uses them. http://tapatalk.imageshack.com/v2/14...f338d5e6a5.jpg

Many laptops us 19v but it would depend on the amperage

Take it down to 12V and you have an LED driver, albeit a small one.

Have a buddy in NY who is maker.

If you are going to toss them I'll see if he has a use for them if you want.

This was actually driving led gas price digits in a sign. Anything used to step it down would likely cost more than the correct 12v power supplies that are stupid cheap.

Just need the right resistor in series. What's the amperage rating?

5A out.

I'm not going to wire these up for a customer. If we go to the hassle of crawling a sign, we put in new correct parts. Don't want to do it twice. ;).


But it might work for some test projects. What resistor would I neec?

Should have looked at the photo... Feeling silly.

Math says 1.4 ohms at 100 watts. Try one of these, measure output voltage with a meter. Amico Aluminum Housing 100W Watt 1.5 Ohm Wirewound Power Resistor:Amazon:Home Improvement

That is an LED driver. It has a constant voltage mode or a constant current mode.

LP1090 Series - LED Driver - Switching Power Supply | HIGH PERFECTION TECH. CO., LTD. | Product Information

Yes it was being used as a driver in a sign. But 19v is not a common voltage, at least in the US. Pretty much all the leds we use are 12 or 24 volt. This sign was the rare bird at 19, and the manufacturer swapped it to 24v guts after a rash of issues.


I was just curious if anyone knew of something to try with the 19v bricks.

If it is set to constant current mode the voltage adjusts automatically. The current should be set to what the LED string of lights require. LEDs are current driven. Set the current and the LEDs will determine the voltage across them.

Maybe they had it set to the wrong mode and that's why there were problems.

I'd go get some LED strips and a diffuser, then start looking for a place to install them. Maybe the toe kick area on your kitchen cabinets? Ours are dimmable and at the lowest setting. It's cool but hard to get a decent picture of.

http://i24.photobucket.com/albums/c5...psqjciieeu.jpg

They will work for a Plastic Printer or small CNC machine.

If you want to use it as a 12V supply, you can add a 3 terminal regulator.

Gut the cells from a bad 18v portable tool battery, then hardwire the output of one of your bricks. You've then got an 18v "portable" tool that will run on AC in a pinch.