SunFounder ESP32 Starter Kit
breadboard. Components such as resistors, capacitors, switches, diodes, etc. can be inserted in any of the rows, but
ICs need to be arranged across the middle gap.
5.4 Resistor
Resistor is an electronic element that can limit the branch current. A fixed resistor is a kind of resistor whose resistance
cannot be changed, while that of a potentiometer or a variable resistor can be adjusted.
Two generally used circuit symbols for resistor. Normally, the resistance is marked on it. So if you see these symbols
in a circuit, it stands for a resistor.
is the unit of resistance and the larger units include K, M, etc. Their relationship can be shown as follows: 1 M=1000
K, 1 K = 1000 . Normally, the value of resistance is marked on it.
When using a resistor, we need to know its resistance first. Here are two methods: you can observe the bands on the
resistor, or use a multimeter to measure the resistance. You are recommended to use the first method as it is more
convenient and faster.
5.4. Resistor 693
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