2 layers88.9 × 63.5 mm Picotouch drumcard, the printed circuit board in 3D

Picotouch drumcard

Card-sized drum synth / sequencer with MIDI In/Out

Size: 88.9 × 63.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 80
Nets: 87
Pads: 234
Tracks, vias: 479, 56
Pours: 1
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 1 Aug 2024
Updated: 16 Aug 2024

Overview

Picotouch drumcard is an open-source printed circuit board by todbot, from the todbot/picotouch_drumcard repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 88.9 × 63.5 mm with 80 parts on 87 nets, routed with 479 tracks and 56 vias.

It is built around the TS20, H11L1S(TA) and 1N4148WT, with the AFC20-S02ACA-00, MBR120 and SSSS811101 among its other parts. Its parts include 26 resistors, 18 diodes, 18 switches, 6 capacitors and 4 ICs. It belongs with the audio and music boards and the RP2040 boards of this library.

Main components

README

README.md

picotouch_drumcard

Playing card-sized (2.5"x3.5") sequencer / synth / USB / MIDI touch controller

Successor to the picotouch_bizcard MIDI controller

Features

17 capacitive touch pads arranged in a step-sequencer layout
15 reverse-mounted LEDs as status / touch indicators
TRS-A MIDI In and Out
Audio out (via 12-bit PWM)
Battery powered, with lipo battery charging circuit
Powered by Raspberry Pi Pico board
Programmable with CircuitPython, Arduino, etc.

Example code

Drum sequencer + synth
MIDI controller
Macropad
USB-MIDI interface

https://github.com/user-attachments/assets/234cb804-bad1-4454-a92b-b1dc36a663cc

Parts

Qty	Value	Footprint	References
15	1k	Resistor_SMD:R_0603_1608Metric	R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15
15	LED	todbot_stuff:LED1206_LTST-C230KRKT-cutout	D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15
11	Capacitive Button	SparkFun-Switch:Pad-CapacitiveTouch	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11
6	Capacitive Button	todbot_stuff:Pad-CapacitiveTouch-SparkFun-10x5mm-roundrect	SW12, SW13, SW14, SW15, SW16, SW17
3	100n	Capacitor_SMD:C_0603_1608Metric	C1, C3, C5
3	10k	Resistor_SMD:R_0603_1608Metric	R16, R17, R18
3	AudioJack4	todbot_stuff:Jack_3.5mm_PJ320D_Horizontal	J1, J2, J3
2	10uF	Capacitor_SMD:C_0603_1608Metric	C4, C6
2	5.1k	Resistor_SMD:R_0603_1608Metric	R25, R26
1	1.8k	Resistor_SMD:R_0603_1608Metric	R21
1	10	Resistor_SMD:R_0603_1608Metric	R23
1	100	Resistor_SMD:R_0603_1608Metric	R20
1	1N4148WT	Diode_SMD:D_SOD-123F	D16
1	220	Resistor_SMD:R_0603_1608Metric	R19
1	33	Resistor_SMD:R_0603_1608Metric	R24
1	4.7k	Resistor_SMD:R_0603_1608Metric	R22
1	47u	Capacitor_SMD:C_0603_1608Metric	C2
1	AFC20-S02ACA-00	easyeda2kicad:CONN-SMD_AFC20-S02ACA-00	X1
1	GND	TestPoint:TestPoint_Pad_D2.0mm	TP1
1	H11L1S(TA)	easyeda2kicad:SMD-6_L7.3-W6.5-P2.54-LS10.2-BL	U2
1	MBR120	Diode_SMD:D_SOD-123F	D18
1	MCP73831-2-OT	Package_TO_SOT_SMD:SOT-23-5	U3
1	MountingHole	MountingHole:MountingHole_2.5mm	H1
1	Pico	todbot_RPI_Pico:RPi_Pico_SMD	U1
1	RX	TestPoint:TestPoint_Pad_D2.0mm	TP3
1	SSSS811101	easyeda2kicad:SW-SMD_SSSS811101	SW18
1	TS20	Package_SO:TSSOP-28_4.4x9.7mm_P0.65mm	U4
1	TX	TestPoint:TestPoint_Pad_D2.0mm	TP2
1	orange	LED_SMD:LED_0603_1608Metric	D17

Questions

How big is the Picotouch drumcard PCB?

It measures 88.9 × 63.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Picotouch drumcard use?

80 parts, built around the TS20, H11L1S(TA), 1N4148WT and AFC20-S02ACA-00. 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 Picotouch drumcard KiCad files?

From the todbot/picotouch_drumcard repository on GitHub, at the commit this page was made from: the board is schematics/picotouch_drumcard/picotouch_drumcard.kicad_pcb and its schematic schematics/picotouch_drumcard/picotouch_drumcard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

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

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

Audio and music RP2040

Topics

circuitpython drum midi pico raspberrypipico sequencer synth

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/todbot-picotouch-drumcard" title="Picotouch drumcard in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/todbot-picotouch-drumcard.jpg" alt="Picotouch drumcard" width="1200" height="900">

A picture that opens the board, for a README

[![Picotouch drumcard](https://pcbkit.io/embed/boards/todbot-picotouch-drumcard.jpg?size=s)](https://pcbkit.io/boards/todbot-picotouch-drumcard)

Source

Repository: todbot/picotouch_drumcard
Board file: schematics/picotouch_drumcard/picotouch_drumcard.kicad_pcb
Commit: c3dc868
Licence: GPL-3.0

Similar boards

2 layers207.5 × 38 mm
Picotouch pad
todbot/picotouch_pad
picotouch MIDI controller, but pad-based
106 parts1GPL-3.0
2 layers59.6 × 42 mm
Macropad synthplug mk2
todbot/macropadsynthplug
Turn StemmaQT port by into Audio Out + MIDI In
43 parts53CC0-1.0
4 layers95 × 55.5 mm
EinkPDA keyboard
TalismanDesign/PocketMage_PDA
An E-Ink PDA device using the ESP32 S3.
137 parts2kApache-2.0
2 layers35 × 30 mm
E73-2G4M08S1C-52840
Rogger/schneggi-sensor
A low-power ZigBee sensor integrated with HomeAssistant for monitoring temperature, humidity, and CO2.
28 parts9GPL-3.0
2 layers80 × 65 mm
Squishbox8
GeekFunkLabs/squishbox
Software and design files for a Raspberry Pi sound module enclosure
35 parts51MIT
4 layers144 × 168 mm
Soundpad economy
willemOH/soundpad
Soundpad: tactile audio sampler instrument and sound sketchpad
184 parts
2 layers99.7 × 31.8 mm
Vetrnik wind sensor
ondras12345/vetrnik
Electronics for heating water with power from a 2 kW wind turbine
41 parts
2 layers180 × 110 mm
Picotouch grid
todbot/picotouch_grid

170 parts2GPL-3.0