I hooked up the sonar to the +5 and GND on the HB and it wroked fine. I used TIC3 for Echo and pin 9 of 2nd Motor driver for INIT and GND for BINH I also hooked up the sonar power leads to the 9.6V unregulated motor power header! It also worked! (...) (28 years ago, 24-Nov-96, to lugnet.robotics.handyboard)
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