[time-nuts] GPS->audio interface

[Hal Murray]

> As a model for what they're trying to do, say you were going to
> measure the acceleration due to gravity by videotaping a falling
> object against a scale in the background. Except that the motion is
> more complex.. Maybe imagine putting an accelerometer in the "payload"
> of a trebuchet... And you want to time align the position of the
> trebuchet components (from the video) with the forces on the payload.
> That's not what they're doing, but now that I describe it, that WOULD
> be a cool science project.  And get away from the "here, I built a
> trebuchet and launched a projectile X meters" which is kind of tired.
> (get one of those analog devices 3 axis accelerometers, hook it to a
> suitable datalogger..) 

For something like that, you could:
  start the camera
  start the recorder in the payload
  whack the payload with a stick to inject a calibration marker
    (the stick has to be visible in the camera)
  maybe re-aim the camera
  launch the payload...

 

-- 
These are my opinions, not necessarily my employer's.  I hate spam.