2 layers39.6 × 100 mm
2 layers281.1 × 236.5 mm
MiniDrumkit2
Fihdi/MiniDrumkit15Eurorack DrumKit module with a 3 channel wave-file player and analog Hi-Hat and Kick Drum sections
- Size
- 281.1 × 236.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 239
- Nets
- 177
- Pads
- 695
- Tracks, vias
- 1,241, 141
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Mar 2026
- Updated
- 1 Apr 2026
Overview
MiniDrumkit2 is an open-source printed circuit board by Fihdi, from the Fihdi/MiniDrumkit repository on GitHub, published under the MIT licence. It is a 2-layer board of 281.1 × 236.5 mm with 239 parts on 177 nets, routed with 1,241 tracks and 141 vias.
It is built around the LM13700M, TL072 and AMS1117-3.3, with the PCM5102PW, BC847 and BC857 among its other parts. Its parts include 87 resistors, 26 capacitors, 21 connectors, 18 diodes and 18 transistors. It belongs with the audio and music boards and the ESP32 and AVR (ATmega, ATtiny) boards of this library.
Main components
6
LM13700M
SOIC-16-16V~-4.75V、4.75V~16V 0℃~+70℃ 110dB 2 2.6mA 20mA 400nA 4mV 50V/us 600nA 9.5V~32V SOIC-16 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
PCM5102PW
TSSOP-20-25℃~+85℃ 1 3V~3.6V Digital filtering、Power-down mode I2S TSSOP-20 ADCs/DACs - Special Purpose ROHSTexas InstrumentsADCs/DACs - Special Purpose
BC847
SOT-231 NPN 100MHz 100mA 100nA 110 200mW 45V 500mV 6V NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)BC857
SOT-231 PNP 100MHz 100mA 15nA 200mW 45V 5V 650mV 800 PNP SOT-23 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)
README
README.md30hp Drumkit module
Eurorack DrumKit module with an Arduino Nano ESP32 3 channel wave-file player and analog Hi-Hat and Kick Drum sections.
The WAV Files are read from a microSD card and need to be called "1.wav", "2.wav" and "3.wav". The files need to be mono, encoded in 16-bit and have 16kHz sampling rate. You can use Audacity to export wav files in this format.
Demo Video: https://www.youtube.com/watch?v=cPHg9nKNO_o
Parts
239| Qty | Value | Footprint | References |
|---|---|---|---|
| 34 | 100k | Resistor_SMD:R_1206_3216Metric | R1, R2, R3, R10, R11, R12, R13, R20, R22, R24, R28, R31, R35, R36, R38, R39 +18 |
| 17 | clipboard:d6b1d540-2acd-48cb-859c-b6cadd5b8444 | , , , , , , , , , , , , , , , +1 | |
| 17 | 1k | Resistor_SMD:R_1206_3216Metric | R14, R17, R21, R25, R27, R29, R37, R48, R49, R53, R58, R59, R62, R65, R68, R69 +1 |
| 13 | AudioJack2 | Library:MonoTRS | J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J14 |
| 12 | clipboard:8a7c8b36-f368-44f6-9871-751257f891b6 | , , , , , , , , , , , | |
| 12 | BC847 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q9, Q10, Q13, Q14, Q16, Q17, Q18 |
| 10 | 47k | Resistor_SMD:R_1206_3216Metric | R18, R19, R50, R54, R63, R66, R67, R70, R75, R76 |
| 8 | 10k | Resistor_SMD:R_1206_3216Metric | R4, R16, R23, R26, R40, R51, R56, R72 |
| 8 | LED | LED_THT:LED_D3.0mm | D8, D9, D10, D11, D12, D13, D17, D18 |
| 7 | 1u | Capacitor_SMD:C_1206_3216Metric | C2, C3, C10, C14, C15, C17, C18 |
| 7 | D | Diode_SMD:D_1206_3216Metric | D1, D2, D3, D4, D5, D6, D7 |
| 6 | BC857 | Package_TO_SOT_SMD:SOT-23 | Q6, Q7, Q8, Q11, Q12, Q15 |
| 6 | R_Potentiometer | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV4, RV5, RV8, RV9, RV10, RV11 |
| 5 | 100k | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV1, RV2, RV14, RV15, RV16 |
| 5 | 100n | Capacitor_SMD:C_1206_3216Metric | C6, C16, C20, C25, C26 |
| 4 | 220pF | Capacitor_SMD:C_1206_3216Metric | C1, C8, C11, C13 |
| 4 | 2k2 | Resistor_SMD:R_1206_3216Metric | R52, R61, R80, R81 |
| 4 | 470R | Resistor_SMD:R_1206_3216Metric | R73, R74, R79, R83 |
| 4 | SW_SPDT | Library:Switch | SW1, SW2, SW3, SW4 |
| 3 | 2n2 | Capacitor_SMD:C_1206_3216Metric | C21, C22, C23 |
| 3 | D | Diode_SMD:D_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D14, D15, D16 |
| 3 | LM13700 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U7, U15, U16 |
| 3 | R | Resistor_SMD:R_1206_3216Metric | R32, R77, R87 |
| 3 | R_Potentiometer_Trim | Potentiometer_THT:Potentiometer_ACP_CA9-H5_Horizontal | RV3, RV6, RV7 |
| 3 | TL074 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U1, U3, U4 |
| 2 | 10u | Capacitor_SMD:C_1206_3216Metric | C19, C24 |
| 2 | 200k | Resistor_SMD:R_1206_3216Metric | R47, R57 |
| 2 | 470nF or omit | Capacitor_SMD:C_1206_3216Metric | C5, C12 |
| 2 | Conn_01x05_Pin | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J18, J20 |
| 2 | Conn_01x06_Pin | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | J19, J21 |
| 2 | Conn_01x07_Pin | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J16, J17 |
| 1 | 100R | Resistor_SMD:R_1206_3216Metric | R15 |
| 1 | 100k | Potentiometer_THT:Potentiometer_ACP_CA9-H5_Horizontal | RV12 |
| 1 | 10R | Resistor_SMD:R_1206_3216Metric | R8 |
| 1 | 10n | Capacitor_SMD:C_1206_3216Metric | C4 |
| 1 | 10p | Capacitor_SMD:C_1206_3216Metric | C7 |
| 1 | 1M | Resistor_SMD:R_1206_3216Metric | R30 |
| 1 | 2M | Resistor_SMD:R_1206_3216Metric | R33 |
| 1 | 470n | Capacitor_SMD:C_1206_3216Metric | C9 |
| 1 | 4k7 | Resistor_SMD:R_1206_3216Metric | R34 |
| 1 | 50k | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV13 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U5 |
| 1 | Arduino_Nano_ESP32 | Module:Arduino_Nano | A2 |
| 1 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J15 |
| 1 | Micro_SD_Card | Connector_Card:microSD_HC_Molex_47219-2001 | J1 |
| 1 | PCM5102 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U20 |
| 1 | TL072 | Package_SO:SOIC-8_5.3x6.2mm_P1.27mm | U2 |
| 1 | TL072 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U24 |
The 230 most common of 239 parts.
Questions
How big is the MiniDrumkit2 PCB?
It measures 281.1 × 236.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MiniDrumkit2 use?
239 parts, built around the LM13700M, TL072, AMS1117-3.3 and PCM5102PW. 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 MiniDrumkit2 KiCad files?
From the Fihdi/MiniDrumkit repository on GitHub, at the commit this page was made from: the board is MiniDrumkit2/MiniDrumkit2.kicad_pcb and its schematic MiniDrumkit2/Hat.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MiniDrumkit2 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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