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 |
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.
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