The electrical drive for the motor is a custom-built voltage
regulator circuit connected to the motor with very light speaker
wire to reduce unwanted constraints on the system motion.
This unregulated DC power supply is 12VDC and 600mA,
which feeds a LM317 regulator with heat sink through the
circuit given in the datasheet. The regulator supplies from 1.25
to 11.75V to the motor with up to 1.5A of current [6].