Introduction: Door Close Reminder
This is the machine behind the door. When you open the door, it makes a sound to remind you to remember to close the door.
Supplies
Arduino Leonardo board
wires
speaker
Ultrasonic sensor
Step 1: Code
write the program
https://create.arduino.cc/editor/bolunchang/5a829a89-4606-4f84-b139-a51b637ffca0/preview
Step 2: Arduino Leonardo
Plug in all wires, install speaker and Ultrasonic sensor
