2 layers304.2 × 124.6 mm
Beat sequencer
GuavTek/beat_sequencer
A MIDI sequencer for percussion using a RP-PICO, WS2812 LEDs, and cherry style keyboard switches
346 parts
2 layers304.2 × 124.6 mm
Beat sequencer choc
GuavTek/beat_sequencerA MIDI sequencer for percussion using a RP-PICO, WS2812 LEDs, and cherry style keyboard switches
- Size
- 304.2 × 124.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 346
- Nets
- 202
- Pads
- 1,188
- Tracks, vias
- 2,024, 461
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 Jun 2025
- Updated
- 24 Feb 2026
Overview
Beat sequencer choc is an open-source printed circuit board by GuavTek, from the GuavTek/beat_sequencer repository on GitHub. It is a 2-layer board of 304.2 × 124.6 mm with 346 parts on 202 nets, routed with 2,024 tracks and 461 vias.
It is built around the WS2812B. Its parts include 160 diodes, 82 switches, 80 capacitors, 14 resistors and 9 transistors. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
1README
README.mdA MIDI sequencer for percussion using a RP-PICO, WS2812 LEDs, and cherry style keyboard switches
Parts
346| Qty | Value | Footprint | References |
|---|---|---|---|
| 80 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +64 |
| 80 | D_Schottky | Diode_SMD:D_SOD-323_HandSoldering | D100, D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D113, D114, D115 +64 |
| 80 | SW_SPST | Custom_FP:SW_PG1350 | SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23, SW24 +64 |
| 80 | WS2812B | CustomLib:LED_SK6812_MINI_REVERSE | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +64 |
| 13 | 10k | Resistor_SMD:R_0603_1608Metric | R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14 |
| 9 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9 |
| 1 | NC | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_SMD | A1 |
| 1 | RotaryEncoder_Switch_MP | Rotary_Encoder:RotaryEncoder_Alps_EC12E_Vertical_H20mm | SW74 |
| 1 | SW_SPST | Button_Switch_THT:SW_PUSH_6mm | SW1 |
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Questions
How big is the Beat sequencer choc PCB?
It measures 304.2 × 124.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Beat sequencer choc use?
346 parts, built around the WS2812B. 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 Beat sequencer choc KiCad files?
From the GuavTek/beat_sequencer repository on GitHub, at the commit this page was made from: the board is hardware_choc/beat_sequencer_choc.kicad_pcb and its schematic hardware_choc/beat_sequencer_choc.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Beat sequencer choc design in my own project?
Its repository states no licence, so its author keeps all rights: ask GuavTek before reusing the design.