Take Control

Part I

  • THEORY: Encoders (optical, magnetic, capacitive)
  • DEVICES: rotary optical encoder
  • HANDS-ON: connect an encoder to a DC gear motor (from mini-bot kits)
    • Observe pulses with oscilloscope or LED
    • Connect encoder to Arduino and maintain speed across range of loads by varying PWM in response to encoder output

Part II

  • THEORY: current measurement (revisit ohms law, use of sense resistor)
  • DEVICES: current sense resistor
  • HANDS-ON: measure load on motor by monitoring current through sense resistor; implement stall protection if current exceeds threshold.
Last modified 6 years ago Last modified on Sep 24, 2015, 9:19:27 AM