2 layers298.8 × 122 mm
Ursaminor pcb
markstory/ursa-minor-keyboard
Design and schematics for the ursaminor keyboard
225 parts23
2 layers315 × 121 mm
Sentry keyboard v1
markstory/sentry-keyboard3Replacement PCB for the gifted keyboards
- Size
- 315 × 121 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 265
- Nets
- 203
- Pads
- 1,179
- Tracks, vias
- 2,881, 489
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 Apr 2026
- Updated
- 6 Nov 2026
Overview
Sentry keyboard v1 is an open-source printed circuit board by markstory, from the markstory/sentry-keyboard repository on GitHub, published under the MIT licence. It is a 2-layer board of 315 × 121 mm with 265 parts on 203 nets, routed with 2,881 tracks and 489 vias.
It is built around the ATMEGA32U4-AU, K210 and K010, with the K08, 1N4148W and SK6812 among its other parts. Its parts include 165 diodes, 13 fuses, 7 capacitors, 4 resistors and 2 connectors. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) and RISC-V boards of this library.
Main components
12
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
K210
BGA-144(8x8x0.65)-40℃~+125℃ 48 64 Bit 8MB External RISC-V BGA-144(8x8x0.65) Microcontrollers (MCU/MPU/SOC) ROHSCanaanMicrocontrollers (MCU/MPU/SOC)K010
-- Modules ROHSM5StackModules
K08
SOT-23-3LSOT-23-3L Thyristors (SCR)/Modules ROHSShenzhen Haoruijia Elec.Thyristors (SCR)/Modules
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
SK6812
SMD-4P,5.4x5mm-40℃~+85℃ 0.6mA 1.6mm 120° 160mcd~320mcd 1kHz 2000V 280mcd~515mcd 3.7V~5.5V 460nm~470nm 520nm~530nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Built-in power-on reset circuit Semi-transparent lens SMD-4P,5.4x5mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
K110
SOD-123FL-65℃~+150℃ 100V 1A 200uA 30A 850mV@1A Independent SOD-123FL Schottky Diodes ROHSGOODWORKSchottky DiodesK12
SOD-123FL-55℃~+125℃ 1 Independent 1A 20V 30A 500uA@20V 550mV@1A SOD-123FL Schottky Diodes ROHSDDFSchottky DiodesK13
SOD-123FLSchottky DiodesGOODWORKK14
SOD-123FL-65℃~+125℃ 1A 200uA@40V 30A 40V 550mV@1A Independent SOD-123FL Schottky Diodes ROHSGOODWORKSchottky DiodesK15
-Switch Accessories / CapsCarlo Gavazzi Computing SolutionsK16
SOD-123FL-65℃~+150℃ 1A 200uA 30A 60V 700mV@1A Independent SOD-123FL Schottky Diodes ROHSGOODWORKSchottky Diodes
README
readme.mdsentry-keyboard
A reverse engineered PCB for the keyboard that Sentry gave as holiday gift in 2024.
Features
- Per key RGB LEDs
- Rotary encoder with switch
- USB host interface connection through picoblade connector.
- Programmable keymap with QMK
Building the Firmware
The firmware directory of this repostiory contains only the files specific
to this keyboards firmware, and does not include all of QMK. To build firmware you
need to have a copy of QMK (lets assume it is at ~/code/qmk):
cp -R firmware/* ~/code/qmk/keyboards/sentry-keyboard
cd ~/code/qmk
qmk compile -kb sentry-keyboard -km defaultThis will compile a .hex file that you can flash onto your keyboard
qmk flash -kb sentry-keyboardBrand new micro controller chips may have not have the bootloader initialized, and you'll need to erase the chip first:
dfu-programmer atmega32u4 eraseOnce the chip has been erased you can flash the firmware on.
License
Both the PCB design and firmware are provided under the MIT License
Parts
265| Qty | Value | Footprint | References |
|---|---|---|---|
| 83 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D165 +67 |
| 82 | SK6812 | Keebio:SK6812-MINI-E | D100, D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D113, D114, D115 +66 |
| 3 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C4, C5, C6 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R8 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric | R6, R7 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 16Mhz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 750mA | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | FU2 |
| 1 | ATmega32U4-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | AVR-ISP-6 | Keebio:Reset_Pretty-Mask | J4 |
| 1 | Conn_01x04 | Connector_Molex:Molex_PicoBlade_53261-0471_1x04-1MP_P1.25mm_Horizontal | J2 |
| 1 | K0_0 | Kaihl hotswap:MX-Hotswap-1U | ESC1 |
| 1 | K0_1 | Kaihl hotswap:MX-Hotswap-1U | F1 |
| 1 | K0_10 | Kaihl hotswap:MX-Hotswap-1U | F10 |
| 1 | K0_11 | Kaihl hotswap:MX-Hotswap-1U | F11 |
| 1 | K0_12 | Kaihl hotswap:MX-Hotswap-1U | F12 |
| 1 | K0_13 | Kaihl hotswap:MX-Hotswap-1U | F13 |
| 1 | K0_2 | Kaihl hotswap:MX-Hotswap-1U | F2 |
| 1 | K0_3 | Kaihl hotswap:MX-Hotswap-1U | F3 |
| 1 | K0_4 | Kaihl hotswap:MX-Hotswap-1U | F4 |
| 1 | K0_5 | Kaihl hotswap:MX-Hotswap-1U | F5 |
| 1 | K0_6 | Kaihl hotswap:MX-Hotswap-1U | F6 |
| 1 | K0_7 | Kaihl hotswap:MX-Hotswap-1U | F7 |
| 1 | K0_8 | Kaihl hotswap:MX-Hotswap-1U | F8 |
| 1 | K0_9 | Kaihl hotswap:MX-Hotswap-1U | F9 |
| 1 | K1_0 | Kaihl hotswap:MX-Hotswap-1U | MXtilde1 |
| 1 | K1_1 | Kaihl hotswap:MX-Hotswap-1U | MX1 |
| 1 | K1_10 | Kaihl hotswap:MX-Hotswap-1U | MX0 |
| 1 | K1_11 | Kaihl hotswap:MX-Hotswap-1U | MX-1 |
| 1 | K1_12 | Kaihl hotswap:MX-Hotswap-1U | MX+1 |
| 1 | K1_13 | Kaihl hotswap:MX-Hotswap-2U | MXbksp1 |
| 1 | K1_2 | Kaihl hotswap:MX-Hotswap-1U | MX2 |
| 1 | K1_3 | Kaihl hotswap:MX-Hotswap-1U | MX3 |
| 1 | K1_4 | Kaihl hotswap:MX-Hotswap-1U | MX4 |
| 1 | K1_5 | Kaihl hotswap:MX-Hotswap-1U | MX5 |
| 1 | K1_6 | Kaihl hotswap:MX-Hotswap-1U | MX6 |
| 1 | K1_7 | Kaihl hotswap:MX-Hotswap-1U | MX7 |
| 1 | K1_8 | Kaihl hotswap:MX-Hotswap-1U | MX8 |
| 1 | K1_9 | Kaihl hotswap:MX-Hotswap-1U | MX9 |
| 1 | K2_0 | Kaihl hotswap:MX-Hotswap-1.5U | MXtab1 |
| 1 | K2_1 | Kaihl hotswap:MX-Hotswap-1U | MXq1 |
| 1 | K2_10 | Kaihl hotswap:MX-Hotswap-1U | MXp1 |
| 1 | K2_11 | Kaihl hotswap:MX-Hotswap-1U | MX[1 |
| 1 | K2_12 | Kaihl hotswap:MX-Hotswap-1U | MX]1 |
| 1 | K2_13 | Kaihl hotswap:MX-Hotswap-1.5U | MX\1 |
| 1 | K2_2 | Kaihl hotswap:MX-Hotswap-1U | MXw1 |
| 1 | K2_3 | Kaihl hotswap:MX-Hotswap-1U | MXe1 |
| 1 | K2_4 | Kaihl hotswap:MX-Hotswap-1U | MXr1 |
| 1 | K2_5 | Kaihl hotswap:MX-Hotswap-1U | MXt1 |
| 1 | K2_6 | Kaihl hotswap:MX-Hotswap-1U | MXy1 |
| 1 | K2_7 | Kaihl hotswap:MX-Hotswap-1U | MXu1 |
| 1 | K2_8 | Kaihl hotswap:MX-Hotswap-1U | MXi1 |
| 1 | K2_9 | Kaihl hotswap:MX-Hotswap-1U | MXo1 |
| 1 | K3_0 | Kaihl hotswap:MX-Hotswap-1.75U | MXcaps1 |
| 1 | K3_1 | Kaihl hotswap:MX-Hotswap-1U | MXa1 |
| 1 | K3_10 | Kaihl hotswap:MX-Hotswap-1U | MX;1 |
| 1 | K3_11 | Kaihl hotswap:MX-Hotswap-1U | MX'1 |
| 1 | K3_12 | Kaihl hotswap:MX-Hotswap-2.25U-ReversedStabilizers | MXenter1 |
| 1 | K3_2 | Kaihl hotswap:MX-Hotswap-1U | MXs1 |
| 1 | K3_3 | Kaihl hotswap:MX-Hotswap-1U | MXd1 |
| 1 | K3_4 | Kaihl hotswap:MX-Hotswap-1U | MXf2 |
| 1 | K3_5 | Kaihl hotswap:MX-Hotswap-1U | MXg1 |
| 1 | K3_6 | Kaihl hotswap:MX-Hotswap-1U | MXh1 |
| 1 | K3_7 | Kaihl hotswap:MX-Hotswap-1U | MXj1 |
| 1 | K3_8 | Kaihl hotswap:MX-Hotswap-1U | MXk1 |
| 1 | K3_9 | Kaihl hotswap:MX-Hotswap-1U | MXl1 |
| 1 | K4_0 | Kaihl hotswap:MX-Hotswap-2.25U | MXlshift1 |
| 1 | K4_1 | Kaihl hotswap:MX-Hotswap-1U | MXz1 |
| 1 | K4_10 | Kaihl hotswap:MX-Hotswap-1U | MX/1 |
| 1 | K4_11 | Kaihl hotswap:MX-Hotswap-1.75U | MXrshift1 |
| 1 | K4_12 | Kaihl hotswap:MX-Hotswap-1U | MXup1 |
| 1 | K4_13 | Kaihl hotswap:MX-Hotswap-1U | MXpgup1 |
| 1 | K4_2 | Kaihl hotswap:MX-Hotswap-1U | MXx1 |
| 1 | K4_3 | Kaihl hotswap:MX-Hotswap-1U | MXc1 |
| 1 | K4_4 | Kaihl hotswap:MX-Hotswap-1U | MXv1 |
| 1 | K4_5 | Kaihl hotswap:MX-Hotswap-1U | MXb1 |
| 1 | K4_6 | Kaihl hotswap:MX-Hotswap-1U | MXn1 |
| 1 | K4_7 | Kaihl hotswap:MX-Hotswap-1U | MXm1 |
The 248 most common of 265 parts.
Questions
How big is the Sentry keyboard v1 PCB?
It measures 315 × 121 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sentry keyboard v1 use?
265 parts, built around the ATMEGA32U4-AU, K210, K010 and K08. 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 Sentry keyboard v1 KiCad files?
From the markstory/sentry-keyboard repository on GitHub, at the commit this page was made from: the board is kicad/sentry-keyboard-v1.kicad_pcb and its schematic kicad/sentry-keyboard-v1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sentry keyboard v1 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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