Assuming EVERY device being powered uses four AA batteries - that's over 22 devices. That's a lot of wiring. Are you up to the task? If the bulk of devices run on two AA batteries each - that's 45 devices.Every Xmas my wife lights up an Xmas village with about 90 batteries. I want to replace the 30-40 decors battery compartments with a power supply the decors require 2, 3, or 4 batteries. What is best recommendation to stop wasting so many batteries?
Is this outdoors?Every Xmas my wife lights up an Xmas village with about 90 batteries. I want to replace the 30-40 decors battery compartments with a power supply the decors require 2, 3, or 4 batteries. What is best recommendation to stop wasting so many batteries?
DC, WHY a nine volt supply??? and why in the world 3 different supplies when the voltage dropping scheme will work so very well. Power diode voltage drops are close enough for this sort of application, and surplus regulated 5 volt supplies are rather cheap, especially if they are used, (RUE, removed from used equipment.) hy work so hard at making a project complicated and expensive???You need 3 volt, 6 volt and 9 volt power supplies. Then you need to figure out how to connect them to the controllers and that includes whether to bus the power around the house (room) or have clusters.
If they were Lead/acid battery types, which I have actually seen, they would be rechargable. They would also be rather costly, over $5 for a single "D" size cell. Then came the NiCad batteries, both cheaper and lighter.Whoops! If these were lead-acid the above numbers would be correct.
But they are probably carbon-zinc or a more modern reaplacement, so the voltages would be 3 volts, 4.5 volts, and 6 volts. Sorry about the mistake.
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by Jake Hertz