- MQ-2 Gas Sensor – detects LPG, methane, and smoke.
- To produce a sound alert when gas concentration exceeds the threshold.
- Because sound and light together ensure the warning reaches people even if one type of signal is missed (e.g., loud environment or poor visibility).
Lesson 1: What is an Actuator?
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Lesson 2: Turn Signals into Motion
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Lesson 3: Timing and Control
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Lesson 4: Smart Alerts and Feedback
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Lesson 5: Automate with Purpose
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Lesson 6: Show Your Smart Machine
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