Posted in Arduino Hacks Tagged arduino, balance, HC-SR04, pid, sonar ← Danielle Applestone And The Story Of Every Othermill NFC Tags Add Old-School Functionality To New Phone → ...

The HC-SR04 sonar modules are available for a mere pittance and, with some coaxing, can do a pretty decent job of helping your robot measure the distance to the nearest wall. But when sellers on eB… ...