Any breakout boards available?
I saw the knock sensor projects as well, but wasn't sure if I could get a sample rate high enough to capture the peak magnitude of the impact. The accelerometer looks like it has an internal peak capture.
I'm looking for a sensor to measure the force of impact
The impact causes the wall to move a small amount, and the accelerometer along with it.
Study hints:The accelerometer measures acceleration.Force is mass times acceleration.Newton's Third Law: for every force, there is an equal and opposite reaction force.
Try it and see.