The set-up process is very simple, and best understood by referring the wiring diagram. If everything goes right,you should see the burning eye of the red LED when there is no object in the safe-zone ...

Inside the light is an Arduino Nano, which reads from the ultrasonic sensor mounted underneath the enclosure and lights up the appropriate LED depending on the car’s distance.

Posted in home hacks Tagged air flow meter, arduino, Doppler, hvac, ultrasonic sensor Hackaday Prize Entry: Sonic Glasses August 28, 2017 by Brian Benchoff 11 Comments ...

With each contact you make, the red LED lights up, the buzzer beeps and the seven-segment LED display counts up. After making contact ten times, the buzzer blares out an annoying sound — game over.

Aside from the Uno and the ultrasonic sensor, you also need a PHPoC Shield to connect the board to the internet and a power supply to power up your Arduino. Mouse cursor controller using joystick ...