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Reply to "LED AC Voltmeters & Ammeters"

ronald weatherby posted:

Just wondering if something like this transformer, using the dc side, would power those dc converter modules Stan is showing above? 

Basic HO train transformers are typically unregulated DC so you may need to add a capacitor and fuss with the throttle position to make it play well with the isolated DC-to-DC converter modules being discussed.

For about $2 on eBay you can get a 12V DC-output regulated wall-wart.  Another 50 cents gets you a female screw-terminal adapter so you don't have to splice the cable.

12v dc output wall wart and wiring adapter

Or.  If you don't want to mess with finding a spare wall-outlet, for about the same cost you can use an AC-to-DC voltage regulator module to generate the 12V DC from a train transformer's AC Accessory output.

ac dc stepdown lm2596hv 

 

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Last edited by stan2004

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