UltraEcho 2009Sept28: Difference between revisions
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(New page: =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 a...) |
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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? | 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? | ||
We should run an experiment in determining how small a delay between two sounds can actually be perceived by the human brain (both consciously and unconsciously). | |||
Revision as of 21:40, 28 September 2009
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?
We should run an experiment in determining how small a delay between two sounds can actually be perceived by the human brain (both consciously and unconsciously).