23 February 2011
Author: Giorgos LazaridisDIY Battery Pack holder with dual voltage outputs
This project is only to give you a new idea. I upload such projects from time to time, because i know that sharing simple solutions and ideas is more useful than sharing a complete and complex project.
The problem that i had, is that i wanted a battery holder that will hold 4 AA batteries in one series. I will use this pack for my door key-code lock project. I need to have 4 batteries inside the door, so space is critical. I cannot have the typical 4-pack battery holder, because it is too thick to fit inside the door. So this is what i've done:
The holder shell
I have better liked to use a plastic tube, like the conduit used for the external electrical installations in factories, but I did not currently have one with the proper diameter. So, i used corrugated cardboard instead:
Connecting the wires
I need 2 different power outlets, one for full 6 volts (4 x 1.5) and one for 3 volts (2 x 1.5). Here is how i connected the wires onto the batteries:
Putting it all together
Finally, i put it all together:
I put some packing tape to secure the two metallic ends firmly in place. This is the result:
As you understand, this battery holder is not ideal for replacing the batteries often. But i do not intend to do so. If you want to make it more flexible and easier to change batteries, i strongly suggest you use a plastic tube with threaded ends and threaded covers.