TouchDrum
About the TouchDrum PCB
TouchDrum is an open source NXP PCB design by JoelEB, published on GitHub. It is a 4-layer board measuring 100 × 100 mm, with 140 components from 57 distinct parts.
Its main chip is the MK20DX256VLH7, from the NXP family. Other key parts include the MKL02Z32VFG4, XC6220B331MR, MCP73831, SN74LV1T125DBV and PAM2401. By type, the board carries 41 capacitors, 32 resistors, 19 connectors, 14 ICs, 9 inductors and 5 switches.
From the project
A repo for all thing TouchDrum Related: hardware/software files, 3D files, etc.
Main components on the TouchDrum
TouchDrum bill of materials (BOM)
140 components, 57 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MK20DX256VLH7 | MK20DX256VLH7_NXP | U1 |
| 1 | MKL02Z32VFG4 | QFN-16 | U2 |
| 1 | XC6220B331MR | SOT-23-5 | U3 |
| 1 | MCP73831 | SOT23-5 | U4 |
| 1 | SN74LV1T125DBV | SOT-23-5 | U5 |
| 1 | PAM2401 | MSOP-8 | U6 |
| 1 | MCP73833_MSOP | MSOP-10_3x3mm_P0.5mm | U7 |
| 1 | MAX17048 | DFN-8_3x3mm | U8 |
| 1 | MIC5365-1.8YC5 | SOT-353_SC-70-5 | U9 |
| 1 | SGTL5000XNLA3 | SGTL5000XNLA3 | U10 |
| 1 | 23LC1024 | 23LC1024 | U11 |
| 1 | LM66200 | SOT-583-8 | U12 |
| 1 | LM66100DCK | SOT-363_SC-70-6 | U13 |
| 1 | TPA2005D1DRBQ1 | TPA2005D1 | U14 |
| 1 | ABM8G-16.000MHZ-18-D2Y-T | CRYSTAL_ABM8G_ABR | Y1 |
| 1 | Conn_01x02 | Screw_Terminal_3.5mm-2 | J1 |
| 4 | Conn_01x03 | 1x03 | J2, J10, J11, J12 |
| 1 | JST_2mm_LiPo | JST_SMD_2.0mm-2 | J3 |
| 1 | 3.5mm TRS | Audio_Jack_3.5mm_SMD | J4 |
| 1 | USB_C_Receptacle | USB-C_16 | J5 |
Show 37 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Conn_01x02 | Electret_Mic | J6 |
| 1 | microSD | microSD_External_Pin | J7 |
| 1 | Qwiic_Vertical | JST_SMD_1.0mm-4_Vertical_Black | J8 |
| 1 | Conn_01x12 | 1x12 | J9 |
| 3 | Conn_01x02 | 1x02 | J13, J17, J18 |
| 3 | ACJS-HHOP | AMPHENOL_ACJS-HHOP | J14, J15, J16 |
| 1 | WQP-DC026M (2.0mm center pin) Barrel_2.0mmPin_PJ064 Wenzhou QingPu Electronics Co | BarrelJack_Horizontal | J19 |
| 1 | 6V/0.5A/1A | 0805 | F1 |
| 1 | ~ | Jumper_3_NC-2_Trace | JP9 |
| 6 | R_Potentiometer_US | Potentiometer-PTV09A | RV1, RV2, RV3, RV4, RV5, RV6 |
| 6 | Standoff | Standoff | ST1, ST2, ST3, ST4, ST5, ST6 |
| 5 | SMD_5.2x5.2mm_h1.9mm | Push_SMD_5.2x5.2mm_h1.9mm | SW1, SW2, SW3, SW4, SW5 |
| 1 | Yellow | LED_0603_1608Metric_Green | D1 |
| 1 | Orange | LED_0603_1608Metric_Green | D2 |
| 1 | Red | LED_0603_1608Metric_Green | D3 |
| 2 | Green | LED_0603_1608Metric_Green | D4, D5 |
| 9 | Ferrite | C_0603_1608Metric | L1, L2, L4, L5, L6, L7, L8, L9 +1 |
| 19 | 0.1uF | C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C12, C16 +11 |
| 1 | 4.7uF | C_0603_1608Metric | C8 |
| 3 | 10uF | C_0603_1608Metric | C9, C13, C41 |
| 9 | 2.2uF | C_0603_1608Metric | C10, C11, C24, C26, C27, C28, C32, C33 +1 |
| 1 | 22uF | C_0603_1608Metric | C14 |
| 1 | 22uF | R_0805_2012Metric | C15 |
| 6 | 1uF | C_0603_1608Metric | C21, C23, C37, C38, C39, C40 |
| 1 | 0.15uF/150nF | C_0603_1608Metric | C22 |
| 2 | 33 | R_0603_1608Metric | R1, R2 |
| 1 | 470 | R_0603_1608Metric | R3 |
| 2 | 5.1k | R_0603_1608Metric | R4, R5 |
| 12 | 10k | R_0603_1608Metric | R6, R15, R16, R18, R19, R20, R21, R26 +4 |
| 1 | 750k | R_0603_1608Metric | R7 |
| 1 | 100k | R_0603_1608Metric | R8 |
| 5 | 4.7k | R_0603_1608Metric | R9, R10, R23, R24, R25 |
| 3 | 2.2k | R_0603_1608Metric | R11, R12, R14 |
| 1 | 100 | R_0603_1608Metric | R13 |
| 1 | 1M | R_0603_1608Metric | R17 |
| 1 | 330 | R_0603_1608Metric | R22 |
| 2 | 150k | R_0603_1608Metric | R28, R30 |
TouchDrum design files
The KiCad project lives in the JoelEB/Touch_Drum repository on GitHub; these links point at the commit this page was built from.
TouchDrum: common questions
What microcontroller does the TouchDrum use?
The TouchDrum is built around the MK20DX256VLH7, from the NXP family.
How big is the TouchDrum PCB?
The TouchDrum measures 100 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the TouchDrum?
140 components, from 57 distinct parts. The full bill of materials is listed on this page.
Where can I download the TouchDrum design files?
From the JoelEB/Touch_Drum repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the TouchDrum design in my own project?
The repository has no license, so all rights stay with JoelEB. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the TouchDrum without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.
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