4 layers401.2 × 151.5 mm
4 layers198.8 × 151.5 mm
A split semi-compact keyboard with extra features
- Size
- 198.8 × 151.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 138
- Nets
- 133
- Pads
- 677
- Tracks, vias
- 650, 179
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 May 2025
- Updated
- 8 Jul 2025
Overview
ALT is an open-source printed circuit board by JustAGlitchFL, from the JustAGlitchFL/CTRL repository on GitHub. It is a 4-layer board of 198.8 × 151.5 mm with 138 parts on 133 nets, routed with 650 tracks and 179 vias.
It is built around the MCP3008-I/P, SK6812MINI-E and RKJXT1F42001, with the RKJXV122400R among its other parts. Its parts include 82 diodes, 40 switches, 5 capacitors, 1 IC and 1 connector. It belongs with the RP2040 boards of this library.
Main components
4
MCP3008-I/P
PDIP-16-40℃~+85℃ 1.35MHz~3.6MHz 10 1LSB 2.7V~5.5V 200kHz 5nA 61dB 8 Multiplexers SAR SPI Yes PDIP-16 Analog to Digital Converters (ADC) ROHSMicrochip TechnologyAnalog To Digital Converters (ADC)
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
RKJXT1F42001
插件插件 Multi-Directional Switches ROHSALPSALPINEMulti-Directional Switches
RKJXV122400R
插件10kΩ 125mW 5V ±5% 插件 Potentiometers, Variable Resistors ROHSALPSALPINEPotentiometers & Variable Resistors
README
README.mdCTRL
A split semi-compact keyboard with extra features
bom and pics soon(tm)
Parts
138| Qty | Value | Footprint | References |
|---|---|---|---|
| 44 | D | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D100, D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D113, D114, D116 +28 |
| 38 | SK6812MINI | cheyao macropad main PCB-third_party_neopixel.petty:SK6812MINI-E | D115, D122, D123, D124, D125, D126, D127, D128, D129, D132, D133, D134, D135, D136, D137, D138 +22 |
| 35 | SW_Push | ScottoKeebs_Hotswap:Hotswap_MX_1.00u | SW35, SW37, SW38, SW39, SW41, SW42, SW43, SW44, SW46, SW47, SW48, SW49, SW50, SW51, SW52, SW53 +19 |
| 5 | C | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C40, C41, C42, C43, C44 |
| 1 | MCP3008 | mcp3008:SOIC127P600X175-16N | U2 |
| 1 | RKJXT1F42001 | 7way:RKJXT1F42001 | S3 |
| 1 | RKJXV122400R | Stick:RKJXV122400R | S4 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_Unspecified | A2 |
| 1 | SHIFT | ScottoKeebs_Hotswap:Hotswap_MX_1.00u | SW73 |
| 1 | SPACE | ScottoKeebs_Hotswap:Hotswap_MX_1.00u | SW76 |
| 1 | SW_Push | ScottoKeebs_Hotswap:Hotswap_MX_2.00u | SW65 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_GCT_USB4085 | J2 |
The 130 most common of 138 parts.
Questions
How big is the ALT PCB?
It measures 198.8 × 151.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the ALT use?
138 parts, built around the MCP3008-I/P, SK6812MINI-E, RKJXT1F42001 and RKJXV122400R. 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 ALT KiCad files?
From the JustAGlitchFL/CTRL repository on GitHub, at the commit this page was made from: the board is ALT (Right)/ALT/ALT.kicad_pcb and its schematic ALT (Right)/ALT/ALT.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ALT design in my own project?
Its repository states no licence, so its author keeps all rights: ask JustAGlitchFL before reusing the design.
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