| ??? 11/28/07 13:32 Read: times |
#147504 - the cheapest ultrasound transceivers ... Responding to: ???'s previous message |
.. are found with 'sports' fishers echo sounders.
They are quite large (1-2" dia), is that a problem? When I was young and handsome (I am not young any more) I did some work with such units and the echo that comes back is minuscule. I do not know if you can google (or otherwise find) a schematic for such a unit, but that would be a starting point. Erik |
| Topic | Author | Date |
| Ultrasound Data Link | 01/01/70 00:00 | |
| Not really ultrasonic. | 01/01/70 00:00 | |
| The other issue ... | 01/01/70 00:00 | |
| Echoes | 01/01/70 00:00 | |
| Speed of sound vs. speed of light | 01/01/70 00:00 | |
| multipath | 01/01/70 00:00 | |
| Signal attenuation is very big | 01/01/70 00:00 | |
| Similarity to IR remote | 01/01/70 00:00 | |
| the cheapest ultrasound transceivers ... | 01/01/70 00:00 | |
| Frequency ? | 01/01/70 00:00 | |
| Fish finder freq. | 01/01/70 00:00 | |
| Miniscule | 01/01/70 00:00 | |
| Thanks - that's useful | 01/01/70 00:00 | |
RC5 should do it | 01/01/70 00:00 |