Module 00
Fundamentals
Voltage, current, resistance and power, the laws that connect them, how to measure them, and where the heat goes.
Every later module uses the ideas in this one. Before a transistor or a circuit board means anything, you need a picture of what moves through a wire and what pushes it.
Lessons
- 00.1Ohm's LawHow voltage, current and resistance are linked, and how to check that a resistor can take the heat.10 min
- 00.2Series and ParallelTwo rules that turn any group of resistors into one value, and why connecting something changes a circuit.9 min
- 00.3The Voltage Divider, and What Loading Does to ItHow two resistors make a smaller voltage, and why the output drops when you connect something to it.12 min
- 00.4Kirchhoff's LawsAt every node, current in equals current out, and around every loop the voltages add up to zero: two rules that solve circuits series and parallel cannot.11 min
- 00.5Using a MultimeterMeasure volts, amps and ohms, and see how much the meter itself changes the circuit it measures.14 min