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Ir adjustment using a potentiometer — Parallax Forums

Ir adjustment using a potentiometer

ltmhallltmhall Posts: 102
edited 2007-01-12 01:33 in Learn with BlocklyProp
In the robotics with the boe bot manual they show you how to adjust your ir
sensors for object detection using resistors. Is there any way you could
use potentiometers instead.

Comments

  • Steve JoblinSteve Joblin Posts: 784
    edited 2007-01-11 20:02
    Sure! a Potentiometer is just a variable resistor.... you will need an Ohm meter to measure the resistance.

    A variation on this is to use a digitial pot where your Stamp could actually make the change in resistance (versus you having to manually adjust it)

    The original Stamps-In-Class Robotics! course made use of a potentiometer and a 555 Timer to create the frequency.
  • Andy Lindsay (Parallax)Andy Lindsay (Parallax) Posts: 1,919
    edited 2007-01-12 01:33
    Here·is·a schematic·example of how to set up the Boe-Bot's left IR detector circuit so that its sensitivity can be adjusted by a 10 k pot.

    attachment.php?attachmentid=44978

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Andy Lindsay

    Education Department
    Parallax, Inc.

    Post Edited (Andy Lindsay (Parallax)) : 1/12/2007 1:37:39 AM GMT
    Boe-Bot Potentiometer IR Circuit.jpg
    291 x 317 - 21K
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