Introduction: Reminder of Turning Off Lights
Remember, Turn Off the Lights, Save the Earth.
This device helps me learn to develop a habit to turn off lights when I leave my room.
The device is simply built by Arduino, mainly using a light sensor, an ultrasonic distance measuring instrument, and a LED light bulb.
It reminds me to turn off the light if I forget, by lighting up the LED light bulb sticking outside the door.
Ultrasonic Distance Measuring Instrument
LED light bulb
Alligator Clips with Pigtails
Various kinds of Wires
Nice looking box
Step 1: Structure of the Device
There are 5 main parts that make the device work:
A-Light Sensor: senses the value of the rays of light(is the light turned on or off) and arranges by the coding
B-Ultrasonic Distance Measuring instrument: detects the distance of the door, and arranges by the coding the main point is to detect if the door is open or not
C-LCD Screen: shows the number of distance, to help the code setting of the Ultrasonic Distance Measuring instrument
D-LED Light Bulb: the object that lightened, easy to notice as a reminder
E-Alligator clips with pigtails: makes the LED light bulb able to reach outdoor
Step 2: Coding
1. set up the LCD Screen to show the distance that the Ultrasonic Distance Measuring instrument detected.
2. create an 'if/else' logic with two conditions:
a) if the value of rays of light is higher then 500--- the light turned on
b) if the number of distance is shorter then 93--- the door opened(leaving the room)
-if a) & b) conditions both fit--->the LED light bulb outside the door will light up(reminds you to turn off the light)
-if either one of them a) or b) conditions don't fit--->the LED light bulb outside the door will not light up(you still in your room or you remember to turn off the light or both)
Step 3: Change the Appearance
No one would want a device full of wires on the ground of their room.
Simply put the device into a box that looks nice.
*It is important not to put the sensor and detector in the box or it cannot work.
Step 4: How It Works in Reality
When I leave the room with lights on, the reminder LED light lights up.
When I leave the room with lights off, the reminder LED will not work.
Step 5: Reflection
This project helps me learn to develop a habit to turn off light when I leave my room. And I learned to create a device on my own from designing to making. It also improved my ability to Arduino skills and to manage a crisis. I think I have way better skills then I thought before and it raises my confidence. I am looking forward to the next project and seek a greater challenge.