Shop OBEX P1 Docs P2 Docs Learn Events
7 x 5 LED dot matrix (BS2) — Parallax Forums

7 x 5 LED dot matrix (BS2)

Mr TedMr Ted Posts: 4
edited 2012-08-22 08:42 in BASIC Stamp
Hello there !

Is anybody know how to connect and use a 7 x 5 LED dot matrix with a basic stamp 2 ?
Do you have an example code ?

Kind regards

Comments

  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2012-08-22 08:42
    Before you get into code examples, you might make sure you have a good wiring that doesn't damage the i/o.

    The safest solution is have other chips actually drive the LEDs as they consume a lot of power. I have powered 7x5 and 8x8 matrices directly from the SX28 (same chip as the BS) without PWM or some other scheme to limit the on time, and this approach can damage the the i/o. At the very least, some current limiting resistors are wise.

    Regarding connecting....
    I use two wire harnesses to reorganize the pins on the LED matrix so that i have one for column and one for rows. This saves the cost of making a printed circuit board to sort out the rather complex pin out.
Sign In or Register to comment.