AA battery to C battery adapter
Instruction
With this design you can use regular AA batteries for devices using C batteries.
As Christmas coming along a lot of toys we got for our kid require C batteries and not having a pile of those chunky batteries laying around I though I can make an adapter.
As far as I know the aa battery has the same output as C battery except for capacity (meaning the battery dies faster) which in my case using rechargeable batteries I can care less.
The idea is to make some spacers around the battery to be able to hold the AA battery in place and use it as a D size battery. the same should be possible for D size batteries with some small tweaks on the outer radius of the spacers.
In this project I used 1/16 inch thick basswood sheets and that's important since we are working with some joints here but do not worry as you can edit the file to whatever size your material is by measuring your material thickness and using it for the width of the yellow group shapes.
If you are using a different material, input the thickness here for all the objects in the Yellow group.
For better assembly, I set my kerf to -0.09
This is what worked best for me on my F1 with this material. make sure to test yours and the pieces should fit together nicely. if you want a more snug fit, you can try values like -0.08 or -0.05 even.
I tagged the left and right just in case if you resize it, it gets out of alignment on yellow layers cuts, the assembly stays straight after putting it together.
for assembly just put the 2 long pieces through the middle circle (the one with longer cuts) piece notches and use 2 other circle pieces for top and bottom.
I used some glue to attach the pieces together just to make sure its easy to put in and out of the device without it coming apart.
after that just place your aa battery in the adapter thingy and don't forget :
HAVE FUN !