- Sun Aug 09, 2015 1:37 am
#183943
I am trying to build a project that will have very low power utilization and be turned on with a knock detector. I was planning on using an attiny85 and a piezo disk sensor and have the attiny wake up once a second and check to see if there is a knock. Because the power output from the piezo is so momentary, however, it is likely to miss a single knock. I was thinking of hooking up the piezo to a capacitor which would then hold the voltage for long enough for the attiny to awaken and check the voltage. Any suggestions for whether this is feasable and suggestions for specific wiring and capacitor size?
thanks
thanks