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measure distance with laser — Parallax Forums

measure distance with laser

robban35robban35 Posts: 32
edited 2010-09-27 08:00 in BASIC Stamp
Hi!

Is it possible to use PWM command to pulsmodulate a laserpointer for distancedetection?

Comments

  • FranklinFranklin Posts: 4,747
    edited 2010-09-24 07:56
    Not with any of the Parallax products I know of. If you come up with a way let us know, there are several people here that would be interested.
  • robban35robban35 Posts: 32
    edited 2010-09-26 23:36
    Hi!

    would this be able to be used with pulsout och pwm and then be able to measure distance (1m to more than 100m) with a photodiod/transistor?

    http://www.robotronic.co.nz/index.php?main_page=product_info&cPath=10&products_id=41

    or is this schematics something of an idea?

    http://www.radiocom.net/modir.jpg
  • Mike GreenMike Green Posts: 23,101
    edited 2010-09-27 06:39
    No

    The times involved (for measuring distance) are much too small for a Stamp to be able to measure them. Think about it ... C is 300000000 m/s. To measure 300 m (out and back), you'd need to accurately measure a time of 2us. A Stamp can't do that. A Propeller could do that, but not with the simple circuits you showed.
  • robban35robban35 Posts: 32
    edited 2010-09-27 07:54
    ok,let´s say a get a propeller, how would the schematics look like?
  • Mike GreenMike Green Posts: 23,101
    edited 2010-09-27 08:00
    I can't help you with the schematics, sorry. This is not a simple "just build it according to the schematic" sort of project.
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