January 2025
Beginner to intermediate
298 pages
9h 31m
English
Content preview from Make: Wearable Electronics, 2nd Edition
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25Chapter 2: Circuits
it out. Because this battery supplies a relatively low amount of current and
an LED is not a highly sensitive or expensive component, it’s possible to
take a more casual approach. But ideally, it’s best to design a circuit that
respects the needs of its components. To do this, Ohm’s law can be used to
determine how much resistance is needed.
Ohm’s law states that voltage (V) is equal to current (I) times resistance (R).
The terms for these three key concepts are defined as follows:
Voltage
The difference in electrical energy between two points. It is measured in
volts (V).
Current
The quantity or amount of electrical energy passing ...
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