btkb

I have a fantastic Pok3r mech that, annoyingly, uses a cable to connect to my computer. I am building a module that includes a decent battery and bluetooth modem to replace the cable.

Prototype

Schematics

Power module

Bluetooth module

Board

Power module

Bluetooth Module

Parts list

Mouser project

ICs

• RN-42 HID - Bluetooth modem with HID firmware
• BSS138 - MOSFET N-Channel Logic
• MCP73831T - Li-Ion battery 4.5V voltage regulator
• LM25775 - Adjustable step-up voltage regulator

Other components

• LEDs
  • 1x Red (data in to BT)
  • 1x Green (data out of BT)
  • Some sort of LED for battery status (TODO)
• Resistors
  • 7x 10 kΩ
  • 1x 2 kΩ
  • 3x 330 Ω
• Capacitors
  • 2x 10 µF (polarized)
  • 2x 4.7 µF
  • 2x 1 µF