Energy harvesting playground is a tangible interaction playground for kids and adults to have fun together and to harvest human energy. There are four features in energy harvesting playground, each of them has different functions and components as following:
1. Self-Sufficient Power Supply
While biking and seesawing, human energy can be turned into electric power by the bike wheel and the flywheel on seesaw through two motor generators. The flywheel mechanical structure keeps the wheel spinning continuously. Then the power will be used to charge batteries.
2. Wheel Animation
While biking and seesawing, the animation wheel is powered up and rotates . People can watch the wheel animation through a small hole.
3. BlinkM Bike Light
Two blinkM LEDs are installed on the bike. Arduino changes the color of BlinkM LEDs according to the value of photoresistor when people bike.
4. Light Color Changing and Blinking
First, the Arduino microcontroller under the seesaw controls the color of LED strips according to the input value of the accelerometer installed on the middle of the seesaw. Second, when people bike and the tape light barrier on the bike wheel blocks the photoresistor on the bike frame, Arduino blinks the LED strips according to the changes of sensor value.
Thanks to the group members:
Sel-sufficient power design
Provide bike and seesaw
LED strips circuit design
Biking detection circuit design
Mechanical structure design
(to turn human energy into electric power)
BlinkM LED bike light appearance design
BlinkM LED bike light circuit design
(play different music tracks while biking)
Idea sharing and idea classifying
Prof. Mark D. Gross: