Ohm’s Law

Parallel Circuit

Multiple paths for energy to flow

Series Ciruit

Wired one after another; single path

Diagram symbols for resistor, LED and Battery

Donald Macadie 1920s

AVO Meter —> Multimeter

Black lead

in COM port

Red Lead

In V Omega mA port

Direct Current

A line with three dots below it parallel to the line

Alternating Current

~

10ADC port

Red lead for up to 10 Amps

Start with __ if current = unknown

10A

hFE, NPN, PNP

for transistors

Continuity

Beep if continuous

Voltage with multimeter

Touch + and - terminal leads

Current with multimeter

Make multi. part of circuit

Resistance with multimeter

Best to use Ohm’s law. LED requires certain number of voltage to activate (forward voltage) which makes it difficult to measure with multimeter. Also R can change with current and temperature

Resistor resistance with multimeter

+ and - leads with ONLY MM as V source to figure out tolerance