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Updated 17seg LED driver for PPDB now available. - Page 2 — Parallax Forums

Updated 17seg LED driver for PPDB now available.

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Comments

  • TtailspinTtailspin Posts: 1,326
    I finally bought one!
    Thanks Tony, I know you put much effort into this tiny little board.
    It's sure to add some extra play value to my PPDB.

    -Tommy
  • JonnyMacJonnyMac Posts: 8,927
    Have you ever considered an I2C version using the HT16K33?
  • MrBi11MrBi11 Posts: 117
    ^ with a jumper selectable pull up resistor on the clock signal.
  • JonnyMacJonnyMac Posts: 8,927
    There should be pull-ups on both pins in the event that the primary I2C buss pins are not used.
  • Jim FouchJim Fouch Posts: 395
    tonyp12 wrote: »
    I got 2 left for sale.
    Here is the pcb diptrace file.

    This is the latest version that don't use any wires.
    Buffer (SN74LV1T34DBVR) so it will work with any power-rail voltage.
    Dual n-mosfet CPH5617-TL-E
    Two resistor-capacitor network as to trick data and latch pins to not see the fast clock signals, as pcb only uses fast, slow and super-slow clock signal.

    Tony, do you still have two available? If so, I'd like them. I have a few I got from you years ago, and have picked up a few new PPDB's since then.

  • jknightandkarrjknightandkarr Posts: 234
    Thanks for the file! I hope I can expand this and use it on a project of mine.

    Joe
  • bte2bte2 Posts: 154
    I bought one and I like it. My only caveat is if you set up your power rail on the breadboard with positive up and ground down (which I tend to do) it will smoke. I'm glad I noticed before it was too late.

    Check power polarity before turning it on it would be easy to miss.
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