Documentation of my miscellaneous side tasks. Mostly a present from my past self to my future self.
Neat project that used a CNC Machine for bulk flashing production devieses. I also used the same PCB to build a development adapter.
CNC Flashing Projekt Notes:
- MDF is a good material for mounting circuit boards. It does not build up static electricity and when treated with outdoor paint, moisture swelling is not so bad.
- Always us a jig to hold the pins at the same hight during soldering and use tweesers to push them back to rediuce the positon diviation created by oversized holes.
DEV Clamp Projekt Notes:
- The PCB should have two small holes for alignment pins so that the tolerances of the clamp don't have to be so tight.
- Wobble in the hinge of the development clamp can be reduced by adding a vertical wall to the lower part.
General Pogo Pin Notes:
- Use Contact pads with holes if possible, the Pogo Pins will be guided into alignment by the hole. I had good experience wit E2 style Pogo Pins.
- Old electronics can have contact problems. If cleaning with IPA does not work, try acetone.
Using epoxy "overcasting" as an alternative to electronic overmolding for small batch productions.
- I like WAGNERSIL® 32 N for mouldings, use WAGNERSIL® RETARDER to extend the working time for degassing.
- Octopus Fluids Alcohol Ink is great for colering clear epoxy. Embedded LEDs remain visible.
- Enamel coatings burn at 400°C, just use the soldering iron at that temperature lighters leave soot.
- Use UV glue or PCB lacquer to hold the chips in place.
- Have a selection of breakout boards next time. 🙃
- T 113A SW: Feeling 4/10 Looks: 8/10 Mounting: Easy
- Cherry MX: Feeling 9/10 Looks: 7/10 Mounting: Annoying
2604-1103 PCB Wago terminal block
BNC ADAPTER 3.5MM NONTERMINATED