= 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.