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Reply to "Wiring 4.5 volt battery pack"

@bluedragon posted:

I reinstalled the batteries and the Lights are still working..   One thing i did not mention was that the battery pack has a small circuit board with an ON OFF switch..  I dont know what mA limit the lights may have but the adapter i used has a 2 Amp output... Having said that since the lights did not light without the batteries, I may not have been getting any power to the lights... as i was not sure how to connect the adapter... surely someone out there has thought of using the lights like i want to do and has a solution??   

Thanks,

Where have you been trying to attach the replacement power supply? I had assumed you'd just cut the wires leading out of the battery pack and spliced the replacement power onto the light side. OTOH, if the light string uses a circuit board to do fancy patterns of flashes or color changes, you'll need to preserve the internal wiring.

The photo is pretty blurry as to the contents, but assuming the battery pack is conventionally configured, it might be possible to fabricate a dummy battery array, something to fit where the batteries have been, with contacts on diametrically opposite corners (top on one side, bottom on the other) to feed power into the switch and circuit board (a small hole in the cover will allow the PS wire access). Done this way, you can always go back to batteries.

In the alternative, you could solder the wires to the contacts for a more permanent installation. Temporarily holding the PS wires against contacts on opposite corners, matching polarity, should let you know whether it will work before you commit! Good luck! 🤞

Last edited by Steve Tyler

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