Sensors and I/O
A low-cost 12-key touch piano based on ESP8266 and SC12B, with chord support, OLED display, and WiFi control.
Official path: https://oshwhub.com/course-examples/eda-piano2
EDA-Piano is an ESP8266-based 12-key touch piano project designed for low cost and easy learning.
Core components are the ESP8266 module and the SC12B touch controller; the TP4056 charger is optional.
It supports simultaneous 12-key detection, chord playing, real-time OLED feedback, and WiFi-based web control.
MCU: ESP8266 module, providing WiFi and GPIO interfaces.
Touch sensing: SC12B chip, supports 12-key simultaneous detection with high accuracy for chords.
Audio output: buzzer driven via PWM or GPIO.
Display: OLED screen showing current keys and note information.
Power: TP4056 Li-ion charging module (optional; can be removed to cut cost).
Total BOM cost is low, dominated by the ESP8266 and SC12B.
Firmware features: 12-key simultaneous touch detection with chord playing.
OLED shows real-time key presses and note names.
WiFi connectivity with a web-based control interface.
Flashing instructions and 3D structure files are provided in the attachments.
ESP8266 firmware development
SC12B touch driver
OLED display driver
Web control interface
中文
传感器与外设
基于 ESP8266 和 SC12B 触摸芯片的 12 键电子琴，支持和弦、OLED 显示和 WiFi 控制。
官方路径: https://oshwhub.com/course-examples/eda-piano2
EDA-Piano 是一个基于 ESP8266 的 12 键触摸电子琴项目，硬件成本低，适合入门和教学。
核心器件为 ESP8266 模组和 SC12B 触摸芯片，可选 TP4056 锂电池充电管理。
支持 12 键同时触摸检测、和弦演奏、OLED 实时显示，以及通过 WiFi 进行 Web 控制。
主控：ESP8266 模组，提供 WiFi 和 GPIO 接口。
触摸检测：SC12B 芯片，支持 12 键同时检测，精度高，可实现和弦。
音频输出：蜂鸣器，通过 PWM 或 GPIO 驱动。
显示：OLED 屏幕，实时显示按键和音符信息。
电源：TP4056 锂电池充电模块（可选，可删除以降低成本）。
整体 BOM 成本较低，主要成本集中在 ESP8266 和 SC12B。
固件功能：12 键同时触摸检测，支持和弦演奏。
OLED 实时显示当前按键和音符。
支持 WiFi 连接，提供 Web 控制界面。
烧录说明和 3D 结构文件见附件。
ESP8266 固件开发
SC12B 触摸驱动
OLED 显示驱动
Web 控制界面