
228 Make: Wearable Electronics
a DC motor augmented with a set of gears that reduce
the number of revolutions per minute (RPMs). DC motors
tend to be on the larger side, though smaller ones are
nice to work with in wearables. A gearhead motor tends
to be much stronger than a typical servo motor.
FANS
Because clothing is often used to provide temperature
regulation and protection, it’s no surprise that wearable-
technology designers are often interested in working with
actuators that provide a heating and cooling effect.
Thanks to the temperature needs of desktop and laptop
computers, a significant number of small 3 V and 5 V fans
are readily available ...