4 layers180 × 100 mm
Class board V0.2
TIGP-Experimental-Methods/class-board-2026
TIGP class instrument 2026: one board, five blocks - KiCad hardware, ESP32-S3 firmware, phone PWA, Python API, workbook
342 parts
4 layers64.3 × 100 mm
Drum trigger
nullcrimson/piezo-conditioner- Size
- 64.3 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 220
- Nets
- 116
- Pads
- 565
- Tracks, vias
- 305, 347
- Pours
- 112
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Dec 2025
- Updated
- 2 Mar 2026
Overview
Drum trigger is an open-source printed circuit board by nullcrimson, from the nullcrimson/piezo-conditioner repository on GitHub. It is a 4-layer board of 64.3 × 100 mm with 220 parts on 116 nets, routed with 305 tracks and 347 vias.
It is built around the LM324DT, BAV99,215-JSM and KT-0805G. Its parts include 105 resistors, 64 capacitors, 25 diodes, 10 connectors and 4 ICs.
Main components
3
LM324DT
SOIC-14-15V~-1.5V、1.5V~15V 0℃~+70℃ 1.2mA 1.3MHz 20nA 300nA 30uV/℃ 3V~30V 4 400V/ms 40nV/√Hz@1kHz 5mV 70mA 80dB Built-in compensation SOIC-14 Operational Amplifier ROHSSTMicroelectronicsOperational Amplifier
BAV99,215-JSM
SOT-230.225W 1 Pair Series Connection 2.5uA 200mA 6ns 70V SOT-23 Switching Diodes ROHSJSMSEMISwitching Diodes
KT-0805G
0805-40℃~+85℃ 100mW 120° 2.6V~3.1V 430mcd 513nm~528nm 525nm 5mA Discrete Diode Emerald Green Water Clear 0805 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
README
README.mdParts
220| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | 22k | R_0402_custom:R_0402_1005Metric | R4, R12, R16, R20, R21, R24, R34, R38, R39, R42, R46, R50, R51, R54, R58, R102 +16 |
| 24 | 22pF | C_0402_custom:C_0402_1005Metric | C1, C4, C5, C10, C13, C14, C22, C25, C26, C31, C34, C35, C38, C41, C42, C47 +8 |
| 24 | BAV99,215 | Package_TO_SOT_SMD:SOT-23 | D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24 +8 |
| 16 | 100k | Resistor_SMD:R_0603_1608Metric | R10, R13, R22, R25, R40, R43, R52, R55, R64, R67, R76, R79, R88, R91, R100, R103 |
| 16 | 10k | R_0402_custom:R_0402_1005Metric | R3, R5, R15, R17, R33, R35, R45, R47, R57, R59, R69, R71, R81, R83, R93, R95 |
| 16 | 1k | R_0402_custom:R_0402_1005Metric | R6, R11, R18, R23, R36, R41, R48, R53, R60, R65, R72, R77, R84, R89, R96, R101 |
| 16 | 220nF | Capacitor_SMD:C_0603_1608Metric | C2, C6, C11, C15, C23, C27, C32, C36, C39, C43, C48, C52, C55, C59, C64, C68 |
| 16 | 68k | Resistor_SMD:R_0603_1608Metric | R2, R7, R14, R19, R32, R37, R44, R49, R56, R61, R68, R73, R80, R85, R92, R97 |
| 8 | 100 | R_0402_custom:R_0402_1005Metric | R104, R105, R106, R107, R108, R109, R110, R111 |
| 8 | 100pF | Capacitor_SMD:C_0603_1608Metric | C8, C16, C29, C37, C45, C53, C61, C69 |
| 8 | 1nF | Capacitor_SMD:C_0603_1608Metric | C3, C12, C24, C33, C40, C49, C56, C65 |
| 8 | 1uF | Capacitor_SMD:C_0603_1608Metric | C7, C9, C28, C30, C44, C46, C60, C62 |
| 8 | 600 | Inductor_SMD:L_0805_2012Metric | FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB8 |
| 8 | AudioJack2 | Connector_Audio:Jack_6.35mm_Neutrik_NMJ4HFD2_Horizontal | J7, J9, J11, J13, J15, J17, J19, J21 |
| 4 | LM324DT | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U1, U3, U4, U5 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_Pad_Via | H1, H2, H3, H4 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | Conn_01x03_Pin | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J1 |
| 1 | Conn_01x10 | Connector_JST:JST_ZH_B10B-ZR_1x10_P1.50mm_Vertical | J3 |
| 1 | KT-0805G | LED_SMD:LED_0805_2012Metric | D1 |
Similar boards
- 4 layers65 × 30 mm
- 4 layers127 × 165 mm
ECU
lflaherty/ev-ecu
Custom ECU (firmware and hardware) for Bespoke Electric Vehicles
258 parts13Apache-2.0 - 2 layers121 × 75.5 mm
Jlctest
cjheath/jlcbasic
JLC Basic parts library for Kicad fetched and converted from EasyEDA
46 parts5 - 4 layers60 × 73.5 mm
Anthracite bottom
trope-oshw/anthracite
MIDI-controllable fuzz pedal: open hardware (CERN-OHL-S-2.0), firmware (GPL-3.0-or-later)
224 parts5CERN-OHL-S-2.0 - 2 layers40 × 30 mm
- 4 layers100 × 62.5 mm
Omniframe Hardware
omniframe-art/Omniframe-Hardware
Omniframe is an open source e-paper digital frame. This repository includes the source and fabrication files for the main and secondary boards for driving the 13.3" Monochrome e-ink display.
104 parts4 - 4 layers100 × 100 mm
Radio Receiver McCormick Mendoza
Jeffrey-McCormick/CPTR480-ENGR357_Quadrature_SDR
Quadrature sampling software defined radio for digital signal processing. Project for Embedded and Real Time Systems (CPTR480) and Engineering Electronics II (ENGR357).
244 parts2MIT
Questions
How big is the Drum trigger PCB?
It measures 64.3 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Drum trigger use?
220 parts, built around the LM324DT, BAV99,215-JSM and KT-0805G. 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 Drum trigger KiCad files?
From the nullcrimson/piezo-conditioner repository on GitHub, at the commit this page was made from: the board is drum_trigger.kicad_pcb and its schematic drum_trigger.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Drum trigger design in my own project?
Its repository states no licence, so its author keeps all rights: ask nullcrimson before reusing the design.