the sloppiest soldering job that ever was (6/17/2015)

P=IV

V=IR

EV=0 (loop)

EI=I (junction)

Transformer: electromagnet lowers voltage, coil ratio = voltage difference

Capacitor: store charge, releases all in burst

Diode: only allows current in one direction, turns AC to DC - makes negative half of sin wave above zero (half-period)

Capacitor and transitor: rounds wave to straight line (constant, stable voltage) to power device

Variable resistors: change resistance and constant current to change voltage