2 layers57.3 × 61 mm

Tobo
eldstal/touchless-xm
Physical buttons for media control on the Sony WH-1000XM2, WH-1000XM3, WH-1000XM4 and possibly WH-1000XM5 wireless headphones
91 parts5
KiCad boards from 2 GitHub repositories tagged “headphones”, the most starred first; open any of them in PCBKit.

eldstal/touchless-xm
Physical buttons for media control on the Sony WH-1000XM2, WH-1000XM3, WH-1000XM4 and possibly WH-1000XM5 wireless headphones

Zektopic/esp32-blue-audio-puck
Turn wired headphones wireless: an ESP32 Bluetooth audio receiver (A2DP sink) with I2S DAC output, parametric EQ, AVRCP remote control and battery-aware power management. Built on ESP-IDF v5.5.