Motorized Devices

Have you ever tried to imagine how you could get by without electric circuits and electric motors in everyday life? Without electric devices, we would need things like a hand-cranked washing machine, a foot-powered dentist’s drill, and a horse-drawn car — all of which existed not too long ago. As far as your smartphone, computer hard drive, microwave, and lamp go — those things would never be possible without electric circuits. Circuits with lights and motors are all around you. In this section, you can use what you learned in the first 15 experiments to build five motorized devices that use electric motors to perform interesting tasks!