BOM

BOM

These are all the non-3D printed parts that need to be sourced:

• 92x 1/16" N42 cube magnets - kjmagnetics
• 8x 1x1x1mm n50 cube magnets - supermagnetman
• 88x 1/8" x 1/8" x 1/16" N48 magnets - totalelement
• 50x "IR928-6C-F" IR LEDs - digikey
• 50x "PT908-7B-F" IR phototransistor - digikey
• 2x Teensy 2.0 - digikey
• 2x 40-pin cut-to-size female headers for teensy 2.0 socket - digikey
• 2x TLC59211IN LED sink drivers - digikey
• (optional) 2x 20-pin IC socket for sink driver - digikey
• 22x 7-pin JST ZH male connector - digikey
• 12x 2k 1206 SMD resistor - digikey
• 48x 150ohm 1206 SMD resistor - digikey
• 2x 100ohm 1206 SMD resistor - digikey
• A couple of feet of 2" adhesive backed copper tape - amazon
• Some normal adhesive backed vinyl, like what is normally used with a vinyl cutter. A single 12"x12" sheet should be sufficient.
• Some 2" clear packing tape, to be used as transfer tape. Some HP-260 tape worked well for me - amazon
• Some superglue or other adhesive of your choice, for gluing magnets in place - amazon

Cables

Recommended. The softer silicone wire is much more flexible, which makes it a lot easier to route in the confined space between the keys and the central board. But it's a pain crimping all those pins. It took a while to get the hang of it, and even then, I still spent over 20 minutes per 7-wire cable. I haven't been able to find a source of pre-made cable assemblies using silicone wire.

• 22x 7-pin JST ZH female connector - digikey
• 148x JST ZH crimp pins - digikey
• ~50ft of 28ga silicon wire - amazon
• Crimper - amazon

OR

• 22x 7-pin JST ZH female connector - digikey
• 70x 6" pre-crimped wires (with stiffer PVC insulation...) - digikey
• 4x 12" pre-crimped wires (with stiffer PVC insulation...) - digikey

OR

• 10x 150mm 7-pin JST ZH-compatible cable assembly (with stiffer PVC insulation...) - amazon or digikey
• 1x 300mm 7-pin JST ZH-compatible cable assembly (with reversed wiring) - digikey

Recommended tools

These are the tools I use and recommend, but, as always, there are many ways to skin a keyboard :)

• Fine beading awl - amazon. Useful for enlarging holes in the printed PCB bases, and for poking through and making holes in the copper once applied to the printed PCB base.
• Craft knife. I love my ergo kiwi, but ye olde xacto knife should be sufficent - amazon. But seriously, get an ergo kiwi. You won't regret it :)
• Soldering iron of your choice
• Flush cutters - amazon
• Tweezers - amazon
• Needlenose pliers. I found these in particular to be very useful when inserting magnets - amazon
• Parallel jaw pliers. somewhat optional, but also useful when inserting magnets - amazon