Hi all,
I'm looking for a specific type of waterproof enclosure. One that fits a single AAA battery (with holder), and space for a sensor + PCB (tiny). I will have a battery powering a pressure sensor inside the enclosure, and the signal will be sent up the connecting wire. Obviously, I plan on drilling a pinhole for the pressure sensor to get data...
This here is quite close to what I'm looking for:
Any pointers?
Drilling a hole makes the container water resistant- no longer waterproof.
I was looking for something to carry my medications and found this. It's .75" wide by 3" tall. It has two compartments inside, so I don't know if you could use it as-is or if you would have to drill out the divider between compartments.
I am not familiar with the AT Tiny, but I have a project in mind that might work using it.
An ATtiny doesn't work on a single AA battery, minimum voltage is 1.7V and an AA battery produces about 1.5V. Most sensors also need more power than that.
Sterlingz:
the signal will be sent up the connecting wire.
Why bothering with a battery if you have a wire connection already? Use it to send power to the sensor!
And indeed lots of sensor housings out there.
wvmarle:
An ATtiny doesn't work on a single AA battery, minimum voltage is 1.7V and an AA battery produces about 1.5V. Most sensors also need more power than that.Why bothering with a battery if you have a wire connection already? Use it to send power to the sensor!
And indeed lots of sensor housings out there.
Sorry, I meant the PCB would be tiny. I plan on using an analog pressure sensor only, and maybe a small pcb.
Kind of new to all this. This is for a fishing application, where anglers use copper as fishing line (quite common actually). I want to use this copper line as a means to transport data. I know it's possible to transmit power and data on a single conductor, but that's a bit too complex for me at this time.
Too many assumptions
Get one working on the bench with huge patra UNO and such
Then miniaturize it
I know it's possible to transmit power and data on a single conductor, but that's a bit too complex for me at this time.
Err...
No.
You need 2 wires. Circuits are called circuits because the electrons go round and round. They need a wire to go and a wire to come back on. If not, all the electrons pile up at one end and this happens.
If that copper wire is well insulated you may be able to use the water as second wire (ground reference, specifically). RF/EMI noise is likely to mess up the signal beyond recognition of course.
Two wires will be far more reliable 
