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Retrofitting a BoeBot with Propeller protoboard — Parallax Forums

Retrofitting a BoeBot with Propeller protoboard

W9GFOW9GFO Posts: 4,010
edited 2007-08-02 03:56 in Propeller 1
Now that my PE kit is not behaving well I've decided to move ahead and convert one of my BoeBots to propeller power. One of the first things I noticed is that the IR detectors are powered right from the Stamp. If I do the same thing with the Propeller I expect that I would get reduced range, no? Or do I just need to use a lower value resistor?

Any tips on making this switch are greatly appreciated!

Comments

  • Mike GreenMike Green Posts: 23,101
    edited 2007-08-02 03:56
    Have a look at BoeBotBasic which is a variation of FemtoBasic for a Propeller Protoboard-based BoeBot. It includes IR detectors, I think with 100 ohm resistors. You need to drop about 1.4V in the resistors (1.7V for the LED, 0.2-0.3V for the I/O pin driver). With 100 ohms, that's roughly 14ma which is a respectable LED current, certainly within the rating of the I/O pin and the LED even if left on constantly.

    Here's the link: http://forums.parallax.com/showthread.php?p=635533

    The most current version of BoeBotBasic is in the Object Exchange.
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