Image Map Image Map
Page 2 of 2 FirstFirst 12
Results 11 to 14 of 14

Thread: Making my own SCELBI boards

  1. #11
    Join Date
    Jan 2007
    Location
    Pacific Northwest, USA
    Posts
    24,532
    Blog Entries
    20

    Default

    Those look right for the early 70s. Compare, for example, the LEDs on even the very first Altair 8800s. Same stuff. The great thing is that you can still get red LEDs in the same package in modern manufacture. Much, much brighter--and probably much longer-lived.

  2. Default

    I believe that these three are original SCELBI builds. And yes the other LED designs existed back then. I have many blinky Altairs and their ilk to prove it.
    It's just that these are the most rare. (and not bright at all)curtis-8H.jpgmystery8H.jpg980x.jpg

  3. #13
    Join Date
    Dec 2011
    Location
    East Coast USA
    Posts
    573

    Default

    The earlier 8h seemed to have the metal cans. The 8b pictures I have seen have the more modern looking LEDs which was a little later on, but still preparing the ALTAIR. The one from the bug museum must have been a later build.

  4. Default

    Keep in mind that SCELBIs were sold as completed units, kits, and PCBs, without components. With SCELBI's, basically anything that might have been available back in the mid 70's, could be considered "period correct".

    regards,
    Mike Willegal

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •