A badge with interactive lightning and music.

For KeyBoard, we just want to make PCB a fine look and more interesting. It is an interactive badge with touching, lightning, and melody. You can wear it on your neck or fix it to your bag. Press the lightning icon to switch between two modes. One is a mini piano while another is circular melody and chasing light. Enjoy a wonderful night at music live with KeyBoard!


  • Interactive badge
  • Rechargeable
  • Easy to wear

Part List

  • KeyBoard × 1
  • Coin battery × 1
  • Brooch × 1
  • Neck sling × 1
  • Micro-USB cable × 1


  • Microcontroller: ATMega328P
  • Operating Voltage: 3.3V
  • Flash Memory: 32KB of which 0.5KB used by bootloader
  • SRAM: 2KB
  • Clock Speed: 16MHz
  • Working Current: 30mA (when buzzer on)
  • Static Current: 8mA (when buzzer and led off)
  • Sleep Current: <1mA
  • Charge Time: 30 min
  • Standby Time: 8 hours
  • Keys: 10
  • LEDs: 8

How to Use


Please feel free to contact if you want to find us.