On Thursday 24 May 2018 16:52:17 jeremy youngs wrote:

> Ok, I got this all loaded , got some help from Peter and am able to
> drop these pins to ground and watch encoder raw count show pin
> activity. So , great everything works, very Happy. The bad .... I
> think I reverse biased this led and popped it. I have another encoder
> and motor to try to read counts on. The real question, this is a heads
> 8950 and it shows eol as Nov 2011 and I cannot locate a source for a
> replacement. Which would be great as the omron encoders are in China
> and will require fabrication to install. Any recommendations?

I am lost at "heads 8950".  Whats that?

> Also I figured a 5 volt 700 ma regulated supply wouldn't have popped
> the diode should this have current limit resistors in line?

The 7i42TA's are that.  Limiting the current to a value below the failure 
of the gates in the fpga on the 7i90HD.  IF you are feeding them 5 
volts.

What diode are you referring to?

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