2 layers144 × 121.4 mm
Pando right
jyap808/pando
58 key split keyboard. Integrated STM32G0B1KBT6, USB-C interconnect, PCA9555 IO Expander design
71 parts13
2 layers144 × 121.4 mm
Pando left
jyap808/pando1358 key split keyboard. Integrated STM32G0B1KBT6, USB-C interconnect, PCA9555 IO Expander design
- Size
- 144 × 121.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 89
- Nets
- 72
- Pads
- 435
- Tracks, vias
- 576, 72
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 16 Jun 2026
- Updated
- 7 Oct 2026
Overview
Pando left is an open-source printed circuit board by jyap808, from the jyap808/pando repository on GitHub. It is a 2-layer board of 144 × 121.4 mm with 89 parts on 72 nets, routed with 576 tracks and 72 vias.
It is built around the STM32G0B1KBT6, PRTR5V0U2X and 1N4148W. Its parts include 29 diodes, 8 resistors, 7 capacitors, 4 ICs and 2 connectors. It belongs with the keyboards and input boards and the STM32 boards of this library.
Main components
3
STM32G0B1KBT6
LQFP-32(7x7)-40℃~+85℃ 1.7V~3.6V 128KB 12bit 12bit 144KB 30 32 Bit 64MHz ARM Cortex-M0+ Built-in+External FLASH LQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
README
README.mdPando Keyboard
Pando is a wired 58-key column-staggered split keyboard. It uses an integrated MCU design on the STM32 platform (STM32G0B1) with an IO expander (PCA9555) on the secondary half, connected over USB-C.
[!NOTE] 📘 The Documentation pages contain a Build and Firmware guide.
[!TIP] 🚀 Want one? Pre-assembled and PCB-tested kits are available on Etsy. Your support helps me keep this project open-source and encourages the development of new models!
Features
- STM32G0B1KBT6 MCU (64 MHz Cortex-M0+, 144 KB SRAM)
- PCA9555 IO expander on the secondary half
- USB-C split communication with ESD protection on all ports
- Hotswap switch sockets
- Single-sided SMD components for hotplate soldering
- Vial firmware for keymap configuration
- Same key layout as the Pando58, but as an assembled PCB instead of a DIY kit
Repository
| Directory | Description |
|---|---|
kicad/ | Schematics and PCB (left, right, switch plates) |
firmware/ | QMK/Vial keyboard definition |
ergogen/ | Layout configuration and case/plate generation |
case/ | 3D printed case models (FreeCAD) |
docs/ | This project's documentation site (built with Zensical) |
Firmware
Pando runs Vial firmware. Precompiled builds are on GitHub Releases — flash with dfu-util, or build from source with the keyboard definition in firmware/keyboards/. See Installing Firmware for details.
License
Pando Keyboard © 2026 by Julian Yap is Open Hardware, licensed under CERN-OHL-S v2. See LICENSE.
The firmware in firmware/ is licensed under the GPL v2.
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 29 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +13 |
| 29 | MX_SW_HS | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX | MX1, MX2, MX10, MX11, MX12, MX13, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23 +13 |
| 8 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7, R8 |
| 5 | Mounting_Wuerth:Mounting_Wuerth_WA-SMSI-M2_H3.5mm_9774035243 | H1, H2, H3, H4, H5 | |
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C3, C8, C11 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C9, C10 |
| 2 | 500mA | Fuse:Fuse_1206_3216Metric | F1, F2 |
| 2 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | U2, U4 |
| 2 | SW_SPST | Button_Switch_SMD:SW_SPST_TL3342 | BOOT1, RST1 |
| 2 | USB_C_Receptacle_USB2.0_14P | PCM_marbastlib-various:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1, J2 |
| 1 | Pando logo | Logo1 | |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | STM32G0B1KBT6 | Package_QFP:LQFP-32_7x7mm_P0.8mm | U1 |
| 1 | XC6206PxxxMR-Regulator_Linear | Package_TO_SOT_SMD:SOT-23-3 | U3 |
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Questions
How big is the Pando left PCB?
It measures 144 × 121.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pando left use?
89 parts, built around the STM32G0B1KBT6, PRTR5V0U2X and 1N4148W. 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 Pando left KiCad files?
From the jyap808/pando repository on GitHub, at the commit this page was made from: the board is kicad/left/pando_left.kicad_pcb and its schematic kicad/left/pando_left.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pando left design in my own project?
Its repository states no licence, so its author keeps all rights: ask jyap808 before reusing the design.