Boards in 49 GitHub repositories, designed in KiCad, that use the MPR121QR2 by NXP Semiconductors (-40℃~+85℃ 1.71V~3.6V 12 29uA 2kV 3uA Capacitive Touch QFN-20(3x3) Touch Sensors ROHS). See how each wires it, with its parts, size, README and files; the MPR121QR2’s symbol, footprint and pinout are on its own page.
iMike78/nest-mini-drop-in-pcb
Drop-in PCB replacement for the Google Nest Mini v2 with ESP32-S3, ESP32-P4 and optional ESP32-C6. Inspired by Onju Voice and Home Assistant Voice PE.
seb-ma/eInkFrame
A step by step guide to create a weather station (and more) in e-ink frame running with MagicMirror².
todbot/synthiota
Pico/Pico2-based board for playing with synthesizers in CircuitPython
skogaby/skogaslider
Firmware, CAD, and PCB files for the skogaslider, an RP2040-based controller to simulate Chunithm's gameplay experience
a5632645/final_design
simple digital waveguide synthesizer & simple mpe midi keyboard(pitch bend and pressure)
tmjnijssen/OSCD_demo_PCB
Open Science Community Delft demonstration PCB
Nicolai-Electronics/kami-hardware
Kami is a modernized re-imagining of the SHA2017 epaper badge by Badge.Team.
LyndLabs/Edge-AI-Badge_Firmware
Design Files for Edge AI Foundation Badge
o0morgan0o/BeAPad_Leds
Project for touch sensors combined to Neopixels and RTP Midi for controlling Light and music via midiMessages across wifi.
Anvarys/lightclock
Light Clock A custom PCB-based Clock/Alarm with a runrise alarm, a circle of capacitive touch controls to easily choose the time and a 2.42" OLED display
CopperPilot/tablet
An 8.4-inch tablet around a chip-down RK3566 + LPDDR4X: 8-layer 0.8 mm mainboard, USB-C daughter board, 1600x2560 dual-DSI display, CNC aluminium shell. Designed end to end by CopperPilot, open for review.
emtee40/project-athena
A simple project to build and learn electronics and embedded design
Hartmannlight/Buttonbox
Firmware and PCB files for an ESP32-S3 sim-racing button box with five rotary encoders, capacitive touch on encoder/buttons, two ST7789 displays, MCP23017 button/LED expansion, MPR121 touch sensing, WS2812 status LEDs…
HeyPCB/esp32-sensors-2
ESP32-S3 boards, one sensor each: KiCad 10, JLCPCB-ready, CERN-OHL-S-2.0
JoeMighty/opentouch-s3
A modern remake of the Bare Conductive Touch Board: 12 capacitive touch electrodes, MP3/WAV/MIDI audio, and now WiFi, Bluetooth LE, USB-C, a proper LiPo power path, a fuel gauge, line-in, MIDI out, Qwiic and an RGB LED.