Solution Statement:

This device is to prevent the plant from overheating from the sun. It uses a fan to cool down and remind the users that the plant will be subjected to severe heat. 

Approach: 

The device involves a DC motor, a servo, a relay switch, and a photoresistor. The servo is mapped according to the photoresistor readings. When the reading goes over a certain level, the relay switch is triggered, which turns on the motor with the fan. 

Process: 

The first design did not involve servo and relay switch. The motor was mounted to digital ports so that the "HIGH" signal should turn it on. However, I found out that the voltage of digital ports is not enough to power the motor, which has a minimal working voltage of 3V. It has to be mounted to 3.3V output. After evaluating what resources and parts I have, I decided to use a servo to activate a relay switch, which connects the motor to the power source. 

Technical Documentation: