I'm working on a boat which will be tossed into a lake and allowed to float free.
Every couple hours or so it will wake up and take a reading of dissolved oxygen content, air and water temperature, pH, it's position, the lake depth and take a picture. This will all be sent back to base station and uploaded onto a website.
Cute, right?
So, my project right now is the depth finder. I've been looking at fishfinders and how they work and I think that's probably the best way to go - run an electronic input into a transducer and send out a fairly low-frequency sound wave since the lake will probably be deep. (Erie/Ontario).
However, I've been looking for such an ambitious soul who has posted such a schematic but no such luck. I'm a little sketchy on how to make a reciever that will take it the returning sound waves. Can anyone lend me their Genius?
Thank you so much!