Micro LED Lamp

Hi there,

This is a little project to up-cycle some old batteries and learn more
on how to use FreeCAD.

Today we create a small micro LED lamp with parts I found when cleaning
up. :D

Requirements:

3 Batteries LR41. (other possible, see notes below)
1 LED
1 Improvised switch by using a metal part, a wire or folded aluminium
foil.

Tools:

3D Printer
Pliers (optional but recommended)

Requirement Notes:

I used metal from an old file for documents. It fit perfectly after
cutting to length.

When using a wire make sure the ends have proper contact. A
single core wire may work best due the fact it gives some spring
effect to the switch.

Using folded aluminium foil may not give the best results.
Adding some paper to fold around may add some more spring effect.
This is totally untested, but works for sure.

You may need to decrease the "roof" of the battery compartment to
gain enough space for the switch design of your choice. However
you can