this week jemilla and I were adjusting our code to get a knock sensor to work but found that when doing so, the vibrations were hard to keep consistent. this was due to the surfaces that we were working on and how hard we were hitting every time and consequently the knock sensor began to look less feasible.
we persisted however and when we attached it to a surface as opposed to letting it sit loosely on it then we could keep the knocking consistent. the next issue we came across was making the knocks more interesting as we wanted to have the users beat the knock to a rhythm in order to make the arduino work but soon found this to be very hard to control.
this model above was our new iteration that we had been using a knock sensor to activate a fan with.