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Testing 7 Segment LED Hardware — Parallax Forums

Testing 7 Segment LED Hardware

microcontrollerusermicrocontrolleruser Posts: 1,194
edited 2016-12-22 23:27 in Propeller 1
Developers

I just want to test it at hardware level.

Want to put it on breadboard of PPDB and just jumper power

to individual segments.

On the back of LED are eight pins.

How do you situate it on breadboard?

Thanks!

Merry Christmas!

Comments

  • PublisonPublison Posts: 12,366
    You would have to provide a part number for the the display. There are many with different pinouts.

  • tomcrawfordtomcrawford Posts: 1,126
    edited 2016-12-22 23:58
    A pin diagram would be even better. Along with whether it is common cathode or common anode. Of the eight pins, seven are one and the eight is the other.
  • PublisonPublison Posts: 12,366
    Tom, good call on common A or C.
  • microcontrollerusermicrocontrolleruser Posts: 1,194
    Developers

    https://www.parallax.com/product/350-00027

    I always use Genuine Parallax Parts. They have that

    factory fit and keep my board running smoothly.:)

    I will look for part # on part.

    Happy Holidays!
  • microcontrollerusermicrocontrolleruser Posts: 1,194
    edited 2016-12-23 01:37
    Developers

    Part # 5161AG

    Ten pins total. 5 top and 5 bottom on backside.

    Merry Christmas!
  • Duane DegnDuane Degn Posts: 10,588
    The datasheet is for both common anode and common cathode versions. The part number doesn't appear to match numbers in the datasheet.

    This isn't really a problem because Parallax offers a nice tutorial here.

    While the tutorial is for C, you can still use the diagram to see how to wire up the display.

    You'll want to make sure you use the resistors shown in the diagram so you don't damage the Propeller (or display) from too high of current.

    You can turn the segments in the display on and off the same way you turned other LEDs on and off. Sorry, but I don't recall if you know how to do this yet?

    BTW, (I don't recall if I mentioned this or not yet) I have a list of links to tutorials here.
  • tomcrawfordtomcrawford Posts: 1,126
    Parallax sells common cathode.

  • microcontrollerusermicrocontrolleruser Posts: 1,194
    edited 2016-12-23 05:23
    Duane

    Thank you!

    What's a Microcontroller 7 segment LED chapter is showing just what we're doing.

    Testing each segment hardware first before running code.

    It has pin chart for LED.

    We'll press on tomorrow.

    Happy Holidays!
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