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dio_tester_and_breakout [2019/03/12 22:02] – [Revision 2: Jan 2019] telldio_tester_and_breakout [2019/10/07 23:16] (current) – [Revision 2: Jan 2019] tell
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   * add two tiny mounting holes.  To avoid enlarging the board, these holes only accept #2 bolts.  nylon hardware is recommended, as they're quite close to components   * add two tiny mounting holes.  To avoid enlarging the board, these holes only accept #2 bolts.  nylon hardware is recommended, as they're quite close to components
   * add silkscreen labeling the three signals on the connectors "ground", "signal", and "+" power.   * add silkscreen labeling the three signals on the connectors "ground", "signal", and "+" power.
 +
 +This version of the board design is https://oshpark.com/projects/SlhiHbwO
  
 ====== Proposed Revision 3: Feb 2019 ====== ====== Proposed Revision 3: Feb 2019 ======
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 We might build this one, or might build a separate logic gate board.  or both. We might build this one, or might build a separate logic gate board.  or both.
 +
 +One limitation of the schematic above is that while the inverted outputs can be wire-ORed and not affect the on-board status LED, wire-ORing the inputs would cause all of the LEDs to light if any input was low.  A more elaborate, buffered design would allow either true or inverted output to be wire-ORed, while still giving a useful status of the input.
  
dio_tester_and_breakout.1552442551.txt.gz · Last modified: 2019/03/12 22:02 by tell