Programmer Clip using Header Pins

This is a clip for programming a board that has solder pad for pin
headers. This avoid to actually solder the header to the pad
(leaving the board intact). Normally this kind of clip use pogo
pins but I was in a hurry and didn't wanted to spend money on this
so I got inspired by https://www.thingiverse.com/thing:1265688 and
wanted a custom version for a 4 pin SWD programmer (for a cheap CNC
offline controller). This worked out well and this design is the
result of it.

This is made to be printed without support and with any material.
Both FDM and SLA should be possible. I printed mine in PLA on my
Ender 3.

For assembly you will need:

- a M3 screw for the hinge
- a spring (I used 9.5x19mm, if you need a different diameter,
please change COMP_SPRING_DIAMETER)
- a pin header (+cable/soldering/glue). Change HEADER if you
need a different number of pin.