UltraEcho 2009Sept28

Ultrasonic hack notes Sept 28th, 2009

Freed arduino RBBB from old north paw beta electronics. Still works! Programmer dongle has loose connection for power pin.

Wrote code to pulse at 40 KHz.

Created small amplifier circuit to drive ultrasonic transducer from arduino pin.

Modified code to make small pulses on a regular pattern. We can hear it working, but it's not clear if can hear both the outgoing and the echo incoming.

We tried to compare them on the o-scope, but couldn't get it to show us the bounced sound (reciever) signal. Not sure what the problem was - o-scope seems to not be working on channel 2?