Tomu programming jig
thingiverse
This is a DIY 3D-printed pogo-pin programming jig for Tomu, a tiny USB device that can be reprogrammed using the built-in USB bootloader. However, in some cases, having a jig to align the SWD programming pins on the bottom can be very helpful. To build this handy jig you will need: * the 3D printed parts available here * 4 pogo pins like these [P111-E 1.3mm Diameter, 33.30mm long test pins] from Amazon * two Adafruit Perma-Proto Quarter boards from Amazon * some 4-40 0.75" or M3 20cm stand-offs from Amazon * a compatible JTAG/SWD programmer like this $8 STLink v2 one from Amazon It's also useful to have a small USB hub with per-port power switches, like the 4-port Sabrent USB hub from Amazon. When soldering the pogo pins, make sure they protrude about 1.5mm from the 3D-printed base.
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