Introduction: Myopia Prevention Machine
This is a machine is made for the kids, some of the parents might worry their children are to close to the screen, and they will be myopia. So when the kids are using the machine and to close to it, the machine's light will flash and have sound, so the kids will know they are to close, they need to go backward.
Step 1: Prepare What You Need.
1. Ultrasonic sensor
2.Arduino speaker
3.LED (I use red)
4.wire
Step 2: Wiring
1.Ultrasonic sensor
VCC to 5V
TRIG to D6
ECHO to D7
GND to GND
2.Arduino speaker
+ to D6
- to GND
3.LED
+ to D12
- to GND
Step 3: Coding
Step 4:
Now we don't need to worry about your kids is being to close to the screen.
