Challenges

Motion-activated Lamp: Turn on a lamp for 10 seconds when motion is detected. This is similar to how it is implemented in the staircases of some apartments.

Gas-sensor-based exhaust fan: Control the speed of an exhaust fan (a motor simulating it) based on the concentration of gas - increase the speed when the concentration is detected to be high. You can also choose to activate a buzzer as well as LED alerts if the gas concentration is very high.

• Here is a gas sensor based example that you can use as a starting point: https://www.tinkercad.com/things/74ZNU8Mht1B-activity11-arduino-gas-sensor

Exercise 4 : Control the rotation speed and direction of a motor based on the distance from an obstacle. This simulates a robotic vehicle that is supposed to stop at a distance between 30 and 35 cm from an obstacle.