Hi there !
First post on Element14, I hope I'm not doing it wrong 
I use an arduino, and I want to create a device that can generate a small impact.
A little bit like a windows braker that are used on scene of accident, but my project has nothing to do with windows or car crash.
I tried to think about a simple way to allow the arduino to create a small impact on demand.
I don't think I need over 2 to 5 impacts per seconds, but I need the impact to be as constant as possible ( same velocity and same force everytime )
A vibration could also do the job...
Anyway, I'm open to lots of idea since so far, no "ready to go" solution seems to exist, so I was counting on some good idea to enlight me.
----------------
My whole idea is to create a device that can read the resonance of an object ( Ie.: a fuel tank ), so I need to "hit" ( the impact part ) something, then I will use a piezo sensor ( from electronic drums) to try to read the vibration that will come from the object that is being inspected.
The basic purpose, in that example, would be to determine, using the resonnance, if the thank is full of empty, or contain something else than fuel inside.
Thanks for taking the time to read 
