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Cogito Ergo Sum
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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.
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10-19-2014, 11:54 AM
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Registered
Join Date: Mar 2003
Posts: 10,319
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Many laptops us 19v but it would depend on the amperage
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10-19-2014, 12:02 PM
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Registered
Join Date: Nov 2004
Location: Charleston, SC
Posts: 2,357
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Take it down to 12V and you have an LED driver, albeit a small one.
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10-19-2014, 03:28 PM
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The Unsettler
Join Date: Dec 2002
Location: Lantanna TX
Posts: 23,885
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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.
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"I want my two dollars" "Goodbye and thanks for the fish" "Proud Member and Supporter of the YWL" "Brandon Won" |
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10-19-2014, 04:25 PM
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Cogito Ergo Sum
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Quote:
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10-19-2014, 06:32 PM
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Serial Lurker
Join Date: Oct 2005
Location: Mount Vernon WA
Posts: 1,252
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Just need the right resistor in series. What's the amperage rating?
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Does anyone know where the love of god goes when the waves turn the minutes to hours? |
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10-19-2014, 06:39 PM
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Cogito Ergo Sum
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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? |
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10-19-2014, 07:22 PM
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Serial Lurker
Join Date: Oct 2005
Location: Mount Vernon WA
Posts: 1,252
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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
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Does anyone know where the love of god goes when the waves turn the minutes to hours? |
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10-19-2014, 07:47 PM
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Registered
Join Date: May 2002
Location: St Louis
Posts: 4,211
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Quote:
LP1090 Series - LED Driver - Switching Power Supply | HIGH PERFECTION TECH. CO., LTD. | Product Information
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Rick 88 Cab |
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10-19-2014, 07:47 PM
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Cogito Ergo Sum
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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. |
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10-19-2014, 07:57 PM
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Join Date: May 2011
Posts: 7,245
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Quote:
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10-19-2014, 10:40 PM
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Registered
Join Date: Nov 2004
Location: Charleston, SC
Posts: 2,357
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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. 
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'87 924S (Sold) |
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10-20-2014, 03:43 AM
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Platinum Member
Join Date: Jul 2001
Location: Leave the gun. Take the cannoli.
Posts: 20,944
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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. |
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10-20-2014, 08:54 AM
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Registered
Join Date: Jul 2001
Location: Lawrenceville GA 30045
Posts: 7,377
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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.
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Mark '83 SC Targa - since 5/5/2001 '06 911 S Aerokit - from 5/2/2016 to 11/14/2018 '11 911 S w/PDK - from 7/2/2021 to ??? |
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10-20-2014, 01:39 PM
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1986 Porsche 944 2.5l
