Electrical & Electronics
The math behind circuits, wiring, and electronics
6 live exhibits. Each one already works. Change a number and see what happens.
Open as board Play with these together. Solving one grows related exhibits.
Linear EquationsOhm’s law: how much current flows?
Push harder (volts) or squeeze tighter (ohms), and watch the current change.
Linear EquationsHow many amps does it draw?
Watts divided by volts gives amps. That decides the breaker and the wire.
Ratios & ProportionsWire resistance: longer and thinner resist more
Resistance grows with length and shrinks with thickness. Pick the wire that keeps it low.
Linear EquationsVoltage drop: what the wire takes before the load gets it
Current times wire resistance is voltage you never get to use.
Linear EquationsVoltage divider: two resistors make a new voltage
The output is the input times a ratio of resistors, until you connect a load.
TrigonometrySine waves: wall power and musical notes
The outlet and a tuning fork follow the same curve: amplitude, frequency, and phase.