TuneShroom
ollyoid·TuneShroom·PCB/TuneShroom.kicad_pcb
About the TuneShroom PCB
TuneShroom is an open source AVR/Arduino PCB design by ollyoid, published on GitHub. It is a 2-layer board measuring 89.4 × 96.4 mm, with 42 components from 13 distinct parts.
Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. By type, the board carries 25 connectors, 6 resistors, 5 capacitors, 2 diodes, 1 IC and 1 crystal.
It belongs with the audio designs in this gallery.
From the project
An artistic capacitive MIDI USB controller
To compile the firmware go into the project folder and make all.
To Flash it onto the board you need an AVR programmer of some kind and to build a little ISP programmer with some pogo pins.
Some fuses have to be changed from their default using:
Then it's just a case of programming it with:

Main components on the TuneShroom
TuneShroom bill of materials (BOM)
42 components, 13 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATMEGA32U4-AU ATmega32U4-AU | TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | 535-10226-1 16MHz | Crystal_SMD_HC49-SD_HandSoldering | Y1 |
| 24 | Conn_01x01 | contact | J1, J2, J3, J4, J5, J6, J7, J8 +16 |
| 1 | WM17141 USB_B_Micro | USB_Micro-B_Molex_47346-0001 | J23 |
| 1 | 507-1802-1 Thermistor | Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | TH1 |
| 1 | ICSP | ICSP | TP1 |
| 2 | 516-1429-6 LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2 |
| 2 | 399-1113-1 22pF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2 |
| 2 | 311-1140-6 0.1uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C3, C5 |
| 1 | 311-1456-6 1uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4 |
| 2 | RC0805FR-0710KL 10K Yageo | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R5 |
| 2 | 311-22AR 22 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2, R3 |
| 2 | 311-330CR 330 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4, R6 |
TuneShroom design files
The KiCad project lives in the ollyoid/TuneShroom repository on GitHub; these links point at the commit this page was built from.
- LayoutPCB/TuneShroom.kicad_pcb
- BOMPCB/bom.csv
TuneShroom: common questions
What microcontroller does the TuneShroom use?
The TuneShroom is built around the ATMEGA32U4-AU, from the AVR/Arduino family.
How big is the TuneShroom PCB?
The TuneShroom measures 89.4 × 96.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the TuneShroom?
42 components, from 13 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the TuneShroom design files?
From the ollyoid/TuneShroom repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the TuneShroom design in my own project?
The repository has no license, so all rights stay with ollyoid. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the TuneShroom without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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