binder_a
resistor is all squiggly. Ground is many lines. Adding two resistors of the ams strength halves twice. The ratio of resistors is constant.
Pulse width modulation
Motor changes electrical to mechanical. Sending pulses through the conrol wire control a servo. The longer the pulse the more degrees servo turn.
Servo is dc and has three wires on it.
CDS photo resistor
Light changes resistance because of chemical used.
Comments