Make your own switch using found materials and use it to control the digital input/output circuit. Anything touching metal to metal will work so be creative and think physically! You are encouraged to change the circuit and programming to suit your purposes. Have yourself some fun.
Lab-Digital Input & Output
Parts
Get Ready
Read and follow the instructions in Getting Started with Arduino, Chapter 3:
Digital Input & Output
Read and follow the instructions in Getting Started with Arduino Chapter 4:
Build A Switch
Make your own switch using found materials and use it to control the digital input/output circuit. Anything touching metal to metal will work so be creative and think physically! You are encouraged to change the circuit and programming to suit your purposes. Have yourself some fun.