good idea, but i am looking for something small, fixed to the pendulum.
Peter

Wagner Lipnharski schrieb:

> Very low cost? Glue a magnet at the bottom of the pendulum, and below
> that install a coil, or a series of coils, or a long curved shape coil
> to "pick-up" the magnetic induction. Any low cost op-amp can amplify the
> picked up voltage, that will be proportional to the pendulum speed, the
> delta-voltage along the time will tells you the acceleration.
>
> Wagner
>
> Peter Keller wrote:
> >
> > Hi
> > I am looking for a lowcost acceleration sensor for capturing the
> > acceleration of a 3ft long pendulum.
> > Peter