[Arduino and HC-SR04 photo from Blax Lab] Posted in Arduino Hacks , Holiday Hacks , Software Hacks Tagged arduino , HC-SR04 , Parallax Ping , ultrasonic , ultrasonic distance sensor Post navigation ...

This activates the Arduino, which prompts the HC-SR04 to take several readings. The code averages these readings, does a little math, and displays the percentage of water remaining in the barrel.

The MyoWare muscle sensor project is currently over on the Kickstarter crowd funding website looking to raise $10,000 in pledges to make the jump from concept to production.