Reply to "Wiring 4.5 volt battery pack"

Steve TylerOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

@bluedragon posted:
I have several of the 4.5 volt battery packs that i use to display christmas lights. I tried to connect and wire a 4.5 volt adapter to it but i cannot get it to light up. Does anyone out there know the method for connecting these battery packs to a plug in adapter??
Thanks,

Dunno anything about those particular Christmas lights, but they appear to be LEDs, so the polarity of the source would be crucial, and the first thing I would check.

Coincidentally, I just put together a roughly 4.5 volt home brew DC power supply for a couple of new Menards purchases (using a 5 VDC supply wired through a 2.5 ohm voltage dropping resistor array), and when I first plugged in one of the devices (a lighted 48 Ford police wagon) it didn't work at all. A quick check revealed that I had reversed the wires, and switching the polarity brought instant gratification!

1/16/236:35 PM

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