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How do you wire a battery pack to split the voltage to multiple electronic devices?

I am wanting to use a two battery packs (a 9V and 12V) to power a few small electronics for a Halloween costume... From the battery pack, I would like to split the power to run into multiple on/off switch buttons that will control the current to small PC fans, small speakers, and a small 9V amp

annodomini27 years ago
You want a bus bar
Re-design7 years ago
Just run a pair of wires and a switch from each of the devices to the voltage of choice.