Dave Tweed wrote:
> Double-check this. IIRC, the VME bus that we used to use at Apollo was
> based on the Eurocard standard, and I believe that a "type B"
> connector depopulated the center row of a 3-row connector, leaving
> two rows of 32 pins each (on 0.100" centers) with 0.200" between the
> two rows.

What I've been running into most is .1" between the rows of pins.  A
representative drawing is at http://www.embedinc.com/temp/din41612b_1.pdf.

> The only other comment I have about your project is that I see no need
> for a separate connector and diode for a "DC" power input. There's no
> problem with feeding DC through a bridge rectifier. If the power
> source is negative-ground, then one of the bridge diodes is
> harmlessly shorted out. If it's positive-ground, then you've got
> problems that even your separate input doesn't solve. :-)

Good point.  I wanted the possibility of a hard ground connection without a
diode drop for use with DC supplies, but that can be solved just as well by
providing a jumper that shorts one of the AC inputs to ground.  Without the
jumper you have AC inputs, with the jumper you have a + and GND inputs.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist