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Electronics and Sensors Essentials
Updated 9/13/2026
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What you'll learn
- Explain what voltage, current, and ground mean in a circuit
- Identify common sensors and whether they are inputs or outputs
- Read a simple wiring diagram and trace the circuit flow
- Calculate output voltage in a basic voltage divider circuit
- Use a microcontroller (micro:bit or Arduino) to read sensor data
About
Learn circuit basics—voltage, current, ground—and how to read sensors with microcontrollers for robotics projects.
What's inside· 29 lessons
- 18. Final Quiz
- 22. Circuit Vocabulary Match
- 36. Quick Check: Sensor or Not?
- 4Try This Example
- 51. What is a Circuit? Voltage, Current & Ground
- 6Current: The Flow
- 73. Microcontrollers: The Brain of Your Project
- 87. Simple Calculation: Voltage Divider
- 9Electronics and Sensors Essentials
- 10Calculate Vout: 5V, 1kΩ, 1kΩ
- 11Is a buzzer a sensor or actuator?
- 125. Reading Wiring Diagrams
- 138. Final Quiz
- 14Reading the Flow
- 15Is a temperature sensor a sensor or actuator?
- 16Voltage: The Push
- 174. Meet Your Sensors: Light, Distance, Temperature & Button
- 18Why micro:bit or Arduino?
- 198. Final Quiz
- 204. Meet Your Sensors: Light, Distance, Temperature & Button
- 21Calculate Vout: 9V, 2kΩ, 1kΩ
- 22Is a light sensor a sensor or actuator?
- 23Reading the Flow
- 24The Formula
- 25Is a motor a sensor or actuator?
- 26Common Symbols
- 272. Circuit Vocabulary Match
- 28Is a button a sensor or actuator?
- 29Ground: The Return Path
Part of these paths
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