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I got a few of these wal-warts free.  I am thinking of using them for powering Miller's signs.  I know from experience, based on Chris' diagnosis, that I want 'regulated' power sources to power his signs (after blowing 3 boards Chris determined I must be getting surges.  Funny though because I was using his own power adapter!!!).

 

Anyways, I tried to research this item on-line and cannot find out if it's regulated or not.  Is it safe to assume that if the word 'regulated' does NOT appear on the transformer then it's NOT regulated?????  I have no intention of ruining $50 signs just because I got some free adapters.

 

Thanks - walt

 

 

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Walt, this adapter is almost certainly unregulated. it will read 4.5v with a 400 ma. load. To use them for Miller signs, I'd put 2 100 ohm 1/2 watt resistors across the signs power connections. this will draw about 100 ma from the supply, and should drop the voltage low enough that the sign won't burn out. Before plugging in the sign, measure the voltage across the resistors. if it's over 5 volts, try adding one more resistor. personally, i'd buy a 5vdc regulated supply-- they are real cheap on ebay-- and put 1 1A diode (1N4001) in/on the + output. this will reduce the 5V output to 4.3--4.5V, and you shouldn't have to worry about blowing the sign out.

 

hope this helps----

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OGR Publishing, Inc., 1310 Eastside Centre Ct, Ste 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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