2 layers316 × 119 mm
Teensy Grovebox
jerry20091103/Teensy_Grovebox
A portable synth and music multi-tool made with Teensy 4.1
142 parts150MIT
2 layers252.1 × 109 mm
Plasma
hridcode/plasmaPlasma is a split keyboard built off the Seeed Studio XIAO nRF52840+ microcontroller. It features a 6x5 key matrix with an ortholinear staggered layout and a thumb button for each side, as well as an OLED display and rotary encoder knob.
- Size
- 252.1 × 109 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 142
- Nets
- 111
- Pads
- 658
- Tracks, vias
- 1,029, 193
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 2 May 2026
- Updated
- 27 May 2026
Overview
Plasma is an open-source printed circuit board by hridcode, from the hridcode/plasma repository on GitHub. It is a 2-layer board of 252.1 × 109 mm with 142 parts on 111 nets, routed with 1,029 tracks and 193 vias.
Its parts include 62 switches, 60 diodes, 4 resistors, 2 ICs and 2 connectors. It belongs with the keyboards and input and lEDs and displays boards and the nRF52 and nRF5x boards of this library.
README
README.mdPlasma
Plasma is an ortholinear staggered split keyboard that connects with BLE. It has an OLED display and rotary encoder as well for extra fun! With 6 columns and 5 rows, plus space keys right at the thumbs, what's not to love?
Pictures
| Schematic (L) | Schematic (R) | PCB | Case |
|---|---|---|---|
 |  |  |  |
BOM
Total: $120.17
Parts
142| Qty | Value | Footprint | References |
|---|---|---|---|
| 62 | SW_Push | MX_Solderable:SW_MX_HotSwap_THT | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +46 |
| 60 | D | Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +44 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R4 |
| 2 | 55 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R3 |
| 2 | Conn_01x02 | Connector_JST:JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | J1, J2 |
| 2 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_MountingHoles | RE1, RE2 |
| 2 | XIAO-nRF52840-Plus-SMD | common_footprints:XIAO-nRF52840-Plus-SMD | U1, U2 |
| 2 | ~ | footprints:SSD1306-4pin-0.91 | O1, O2 |
The 134 most common of 142 parts.
Questions
How big is the Plasma PCB?
It measures 252.1 × 109 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Plasma use?
142 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Plasma KiCad files?
From the hridcode/plasma repository on GitHub, at the commit this page was made from: the board is source/pcb/plasma.kicad_pcb and its schematic source/pcb/left.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Plasma design in my own project?
Its repository states no licence, so its author keeps all rights: ask hridcode before reusing the design.
Similar boards
- 2 layers156 × 185.9 mm
Torabo tsuki lp M
sekigon-gonnoc/torabo-tsuki-lp
torabo-tsuki lp is low profile split keyboard with trackball(s)
142 parts110 - 2 layers167.6 × 97.5 mm
AS3397 proto DIP
PhysicsDptAngers/polyUAnalog
Open source, analog and polyphonic synthesizer
142 parts88MIT - 2 layers357.8 × 124.5 mm
Vic2020mainboard
danwerner21/vic2020
A Vic-20 clone created with [almost] all readily available parts
142 parts78 - 2 layers144.8 × 88.9 mm
- 2 layers242.2 × 72.1 mm
- 2 layers285 × 94.6 mm
- 2 layers304.8 × 95.3 mm
