68kMLA Classic Interface
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| Click here to select a new forum. | | -5V & -12V: Do 030 PDS cards use these Voltages? | Posted by: Trash80toHP_Mini on 2017-05-07 12:07:48
100mm x 100mm appears to be the max size for SEEED and other ProtoPCB houses. Curious about this because those lines are the limiting factor in fitting a PDS connector across a board of those dimensions.
By edging the PDS connector as far as production design rules allow to one side makes room for .1" for each of the last two rows, the second of which is redundant, being ground. 3.8" or 3.7" worth of header thruholes should fit within the board limits.
Notches place on the edge of the Power and Ground fill planes on the PCB would provide guides for filing the board to clear the last rows of the PDS connector. Tapping the A/B or connection harness for jumpering those two voltages to the riser adapter will work fine if they're needed.
Adapter pic from prototyping bus adapter thread:
/monthly_05_2017/post-902-0-13978900-1494097113.jpg">View attachment 12710
A 100mm x 100mm prototyping area on an edgercard I/O conversion riser would make things considerably easier for anyone hacking the SE/30 or IIsi PDS for whatever purpose to use cheap PCBs for experimentation. I really miss the days of just ordering up prototyping risers and cards from mail order houses for ISA, Apple II and NuBus. :-/
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