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Picotouch pad

todbot·picotouch_pad·schematics/picotouch_pad/picotouch_pad.kicad_pcb

Picotouch pad PCB layout, top view — open source RP2040/RP2350 board by todbot

About the Picotouch pad PCB

Picotouch pad is an open source RP2040/RP2350 PCB design by todbot, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 207.5 × 38 mm, with 100 components from 16 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the MCP73831-2-OT. By type, the board carries 28 resistors, 21 capacitors, 19 LEDs, 3 diodes, 2 ICs and 1 crystal.

It belongs with the audio designs in this gallery.

From the project

picotouch MIDI controller, but pad-based

Main components on the Picotouch pad

PicoMCP73831-2-OT

Picotouch pad bill of materials (BOM)

100 components, 16 distinct parts.

QtyPartRefs
1
Pico
U1
1
MCP73831-2-OT
U2
1
AFC20-S02ACA-00
X1
1
AudioJack4
J1
16
1
PAD1, PAD2, PAD3, PAD4, PAD5, PAD6, PAD7, PAD8 +8
8
1
PAD17, PAD18, PAD19, PAD20, PAD21, PAD22, PAD23, PAD24
1
SSSS811101
SW1
19
SK6812SIDE
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +11
1
orange
D1
2
MBR120
D2, D3
19
100n
C1, C2, C3, C4, C5, C6, C7, C8 +11
2
10uF
C20, C21
24
1M
R1, R2, R3, R4, R5, R6, R7, R8 +16
2
5.1k
R24, R25
1
10
R26
1
33
R27

Picotouch pad design files

The KiCad project lives in the todbot/picotouch_pad repository on GitHub; these links point at the commit this page was built from.

Picotouch pad: common questions

What microcontroller does the Picotouch pad use?

The Picotouch pad is built around the Pico, from the RP2040/RP2350 family.

How big is the Picotouch pad PCB?

The Picotouch pad measures 207.5 × 38 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Picotouch pad?

100 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Picotouch pad design files?

From the todbot/picotouch_pad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Picotouch pad design in my own project?

Yes, under the terms of its GPL-3.0 license, which todbot chose for the repository.

Can I test firmware for the Picotouch pad without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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