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Intermediate Course
3 lessons32 min total
Sensing the world
Light, distance, temperature and humidity: voltage dividers, ultrasonic timing and digital sensors.
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Course Syllabus
1
Light sensor (LDR)
Turn changing resistance into a voltage with a divider, and build a night light.
Simulation10 min
2
Measuring distance with sound
The HC-SR04 sends an ultrasonic ping and times the echo.
Simulation12 min
3
Temperature and humidity (DHT11/22)
Read a digital sensor with a library and handle failed readings.
Simulation10 min