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Ideas for Mk2

  • Up to 3S operation (12.6V)
  • LEDs and push-button for configuration
  • Inputs
    • Servo input 3-pos switch
    • Servo input 2-pos switch
    • External 3-pos switch
    • External 2-pos switch
    • External push-button (any difference from 2-pos switch?)
    • Internal push-button
    • Light Controller protocol
  • Arming function
    • Can be disabled in the settings
    • Applies to all input modes except Light Controller
  • Configurable motor reversal
    • Do we need that? User can just plug in the motor the other way around ...
  • Firmware update
    • Hold button to start
  • Configurable safety timeout for motor running
  • Mini-ESC mode
    • 8 kHz to 16 kHz PWM frequency?
    • Drag brake adjustable?
    • Different modes: F/B/R, Crawler mode, F/B?
    • End-point learning
    • Channel reversing
    • Punch?

Building blocks

  • LPC812 16p (or QFN?)
  • Use Wuxi RZ7899 or RZ7889 motor driver
  • LDO 3V3
  • 100uF polymer 16V 5x9mm
  • Low-cost 3.3V-side buffer cap? 10u MLCC?
  • Pushbutton
  • External 2-pos switch connects to S/RX - GND
  • External 3-pos switch connects to S/RX - Tx - GND
  • RGB LED
  • Power input
    • Allow various combinatoins:
      • Motor and electronics powered from servo connector
      • Motor and electronics powered from external supply
      • Motor powered from external supply, electronics powered from servo connector
    • Feed MCU from BAT54C! SOT-23
      • Motor-side use 6p connector with same jumper arrangement as on Mk4P/Mk4S