This is the first test I did with the water vibrations. If you can see, the numbers are very small, but there does seem to be a reaction from me moving my finger in the water. Since then, I have removed the LED's from the shift register and hooked them up individually to different pins.
I also altered the code to measure the volts from the piezo disk at a more constant rate, and with higher numbers so it can affect the brightness of the LED's. Now all that remains is constructing the basin for the water and sand, and attaching the apparatus.
Lydia, I didn't think of it sooner but we should look into ways to amplify the piezoelectric signal through the circuitry.
ReplyDeleteA quick internet search brought me to this amplification circuit that may useful to you. I have some additional amplifying ICs if we don't have what you would need in storage.
http://davidhoulding.blogspot.com/2014/02/high-sensitivity-vibration-sensor-using.html
ReplyDeletehttps://www.sparkfun.com/products/9816
ReplyDeletehttps://www.sparkfun.com/products/9816
ReplyDelete