Imported from GitHub: ssbb/tako · commit 5aa952a · license MIT
Description
34 key EC split keyboard
README
Tako
Tako is a vertical stagger split keyboard with electrostatic capacitive (EC) non-contact switches.
Bill Of Materials (BOM)
Production Files
Depending on which parts you are going to use, make sure to select the proper top plate (OG or NIZ). Ensure you use the correct thickness - the OG (OEM, Deskeys, etc) plate should be 1.2mm, and the NIZ should be 1.6mm!
MCU
RP2040-based boards should be used for wired build - Liatris, Frood, Sea-Picro, Splinky, etc.
ATmega32U4 (Pro Micro) won't work.
Wireless
For a wireless build, you can use nice!nano. Keep in mind that EC matrix consume significantly more power than mechanical keyboards. An 80mAh battery placed under the MCU will last for about a day only. I don't have exact numbers yet (still waiting for a power profiler), but you will likely need to use a larger battery. Consider using longer standoffs with a 3D-printed or acrylic spacer between the PCB and the bottom plate, and place the battery there.
Display
5 pins for nice!view are exposed. 128x32 OLED can be used on first 4 pins but won't be perfectly centered.
Components
| Component | Package | Amount | Details |
|---|---|---|---|
| OPA350 | SOIC-8 / SOP-8 | 2 | LCSC |
| 74HC4051 | SOIC-8 / SOP-8 | 2 | LCSC |
| 100nF Capacitor | 0805 | 4 | LCSC |
| 220pF Capacitor | 0805 | 2 | LCSC |
| 100Ω Resistor | 0805 | 8 | LCSC |
| 1kΩ Resistor | 0805 | 2 | LCSC |
| 100kΩ Resistor | 0805 | 12 | LCSC |
| Reset Switch | 2 | LCSC | |
| PJ-320A | 2 | Wired only. LCSC | |
| 5.1kΩ Resitor | 0805 | 2 | Wired only. LCSC |
| Power Switch | 2 | Wireless only. LCSC |
Mounting
OG Plate
| Part | Amount | Details |
|---|---|---|
| M2x6 Standoff | 16 | Max OD 3.4mm. Aliexpress |
| M2x4 Screws | 32 | Aliexpress |
| M1.6x6 Standoff | 12 | Aliexpress |
| M1.6x4 screws | 24 | Aliexpress |
NIZ Plate
| Part | Amount | Details |
|---|---|---|
| M2x6 Standoff | 28 | Max OD 3.4mm. Aliexpress |
| M2x4 Screws | 56 | Aliexpress |
EC Parts
| Part | Amount |
|---|---|
| Housings | 34 |
| Domes | 34 |
| Conical springs | 34 |
| Sliders | 34 |
| Silencing rings | 34 |
- If you going to use DES V3/Carrot domes then it's recommended to get DES Volcano springs to avoid sping crunch.
- Silencing rings are recommended for DES parts. If you want the same key travel as HHKB Type-S with DES housings and DES sliders then you should get #7 rings.
Some EC vendors:
You can only use MX-compatible sliders due to the housing orientation. See details.
NIZ sliders are MX-compatible by default.
Build Guide
Case
There's an awesome case for Tako designed by GofranChang. Check it out over at GofranChang/TakoNest - huge thanks for putting this together! 🙌
Firmware
Thanks
Special thanks to Cipulot for all the work on EC keyboards and assistance.
- jimmerricks for Swoop
- duckyb for Urchin I was inspired by
- Awesome Pete Johanson for assistance
- kanru for his work on Zephyr driver for HHKB which I used for reference
Support
Check #ssbb channel on Absolem Club discord. Join
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