2 layers53.3 × 130.8 mm
2 layers99.6 × 100 mm
Gateometry
Desval27/GateometryGateometry is an Arduino-based, 8-channel Euclidean rhythm generator for Eurorack synthesizers, featuring programmable rhythms, individual gate outputs and mute switches, external clock synchronization, and an OLED display with rotary encoder control for creating complex polyrhythms and evolving rhythmic patterns.
- Size
- 99.6 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 79
- Nets
- 123
- Pads
- 329
- Tracks, vias
- 517, 15
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 28 Sep 2026
- Updated
- 29 Sep 2026
Overview
Gateometry is an open-source printed circuit board by Desval27, from the Desval27/Gateometry repository on GitHub, published under the MIT licence. It is a 2-layer board of 99.6 × 100 mm with 79 parts on 123 nets, routed with 517 tracks and 15 vias.
It is built around the 74HCT541D, 74HC165D and 74HC595, with the 74HCT14D and BAT85 among its other parts. Its parts include 24 resistors, 12 diodes, 11 connectors, 9 switches and 7 capacitors. It belongs with the audio and music and lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
5
74HCT541D
SO-20-40℃~+125℃ 1 15ns@4.5V,50pF 160uA 4.5V~5.5V 6mA 6mA 74HCT 8 Tri-State Unidirectional SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74HC165D
SO-16-40℃~+125℃ 1 28ns@6V,50pF 2V~6V 35MHz 500mW 74HC 8 Parallel or Serial to Serial SOIC-16 Shift Registers ROHSNexperiaShift Registers
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
74HCT14D
SOP-14-40℃~+125℃ 1 1.9V~2.1V 2uA 34ns@4.5V,50pF 4.4V 4.5V~5.5V 400mV 4mA 4mA 500mV~600mV 6 74HCT Schmitt trigger SOIC-14 Inverters ROHSNexperiaInverters
BAT85
DO-341 Independent 200mA 2uA@25V 30V 5A 800mV@100mA DO-34 Schottky Diodes ROHSNexperiaSchottky Diodes
README
panel/README.mdGATEOMETRY PANEL
!Untested!
The Gateometry front panel provides a compact (for a given value of compact), intuitive interface for the eight-channel Euclidean rhythm generator. It features an OLED display for pattern visualization and menu navigation, a rotary encoder with an integrated pushbutton for parameter selection and editing, and dedicated run/stop and mute controls with LED status indication. Eight individual gate output jacks provide connections to external Eurorack modules, while clock input, clock output, and reset connections allow integration with other sequencers and clock sources. The panel is designed to provide convenient access to Gateometry's rhythmic capabilities while maintaining a clean, functional Eurorack layout.
GERBER TO ORDER
RENDERS
Parts
79| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1, R3, R4, R7, R11, R15, R16, R19, R20 |
| 9 | 4k7 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R2, R5, R6, R12, R13, R17, R18, R21, R22 |
| 6 | 100n | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C2, C3, C4, C5, C6, C7 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_Pad_TopBottom | H1, H2, H3, H4 |
| 3 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R8, R9, R10 |
| 2 | 100k | Resistor_THT:R_Array_SIP9 | RN1, RN2 |
| 2 | 74HCT541 | Package_DIP:DIP-20_W7.62mm_LongPads | U2, U4 |
| 2 | BAT85 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D11, D12 |
| 1 | 0.96 Inch OLED I2C Display Module | Desval27:0.96 Inch OLED I2C Display Module | U3 |
| 1 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R24 |
| 1 | 10k | Resistor_THT:R_Array_SIP9 | RN3 |
| 1 | 22k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R23 |
| 1 | 2k2 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R14 |
| 1 | 47µ | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1 |
| 1 | 74HC165 | Package_DIP:DIP-16_W7.62mm_LongPads | U6 |
| 1 | 74HC595 | Package_DIP:DIP-16_W7.62mm_LongPads | U1 |
| 1 | 74HCT14 | Package_DIP:DIP-14_W7.62mm_LongPads | U5 |
| 1 | Arduino_Nano_v3.x | Desval27:MODULE_ARDUINO_NANO | A1 |
| 1 | CLOCK IN | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J10 |
| 1 | CLOCK LED | LED_THT:LED_D5.0mm_FlatTop | D6 |
| 1 | CLOCK OUT | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J9 |
| 1 | CLOCK OUT LED | LED_THT:LED_D5.0mm_FlatTop | D10 |
| 1 | GATE1 | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J1 |
| 1 | GATE1 LED | LED_THT:LED_D5.0mm_FlatTop | D1 |
| 1 | GATE2 | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J2 |
| 1 | GATE2 LED | LED_THT:LED_D5.0mm_FlatTop | D2 |
| 1 | GATE3 | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J3 |
| 1 | GATE3 LED | LED_THT:LED_D5.0mm_FlatTop | D3 |
| 1 | GATE4 | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J4 |
| 1 | GATE4 LED | LED_THT:LED_D5.0mm_FlatTop | D4 |
| 1 | GATE5 | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J5 |
| 1 | GATE5 LED | LED_THT:LED_D5.0mm_FlatTop | D5 |
| 1 | GATE6 | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J6 |
| 1 | GATE6 LED | LED_THT:LED_D5.0mm_FlatTop | D7 |
| 1 | GATE7 | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J7 |
| 1 | GATE7 LED | LED_THT:LED_D5.0mm_FlatTop | D8 |
| 1 | GATE8 | Desval27:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J8 |
| 1 | GATE8 LED | LED_THT:LED_D5.0mm_FlatTop | D9 |
| 1 | MUTE1 | Desval27:2MS1T1B1M2QES | SW2 |
| 1 | MUTE2 | Desval27:2MS1T1B1M2QES | SW3 |
| 1 | MUTE3 | Desval27:2MS1T1B1M2QES | SW4 |
| 1 | MUTE4 | Desval27:2MS1T1B1M2QES | SW5 |
| 1 | MUTE5 | Desval27:2MS1T1B1M2QES | SW6 |
| 1 | MUTE6 | Desval27:2MS1T1B1M2QES | SW7 |
| 1 | MUTE7 | Desval27:2MS1T1B1M2QES | SW8 |
| 1 | MUTE8 | Desval27:2MS1T1B1M2QES | SW9 |
| 1 | OLED POWER | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | POWER | Connector_IDC:IDC-Header_2x08_P2.54mm_Vertical | J11 |
| 1 | ROTARY ENCODER | Desval27:Rotary Encoder | ENC1 |
| 1 | RUN/STOP | Button_Switch_THT:SW_PUSH_6mm_H8mm | SW1 |
Questions
How big is the Gateometry PCB?
It measures 99.6 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Gateometry use?
79 parts, built around the 74HCT541D, 74HC165D, 74HC595 and 74HCT14D. 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 Gateometry KiCad files?
From the Desval27/Gateometry repository on GitHub, at the commit this page was made from: the board is hardware/Gateometry.kicad_pcb and its schematic hardware/Gateometry.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Gateometry 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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