I'm feeling like a wet paper bag right now, I really want to do some more stuff but my nose is totally clogged up, and my mind is all woozy. Thank you very much, common cold.
In anycase, I can't seem to sleep so thought I'd quickly do two things with my put-aside midi controller. Setup the Step Up converter so that it outputs about 10V DC (from the arduino's 5V), and do a test hook up of the breath sensor to the tubing. All done in a few minutes >.>
I'll also be working blind as the full scale voltage out of the breath sensor is about 25mV.... peak. My multimeter has a 200mV setting, hopefully it will actually register _something_ when I blow on the breath controller. I've looked at the more affordable oscilloscopes, but the cheapest that has a suitable mV/div appears to be about £300 quid. Uh no.
So, the current plan is to wire up the differential amplifier, blind, and hope that it works :-/
Looks like I'm going to hobble back to my bed and attempt to sleep again. Oh, and more meds.