Re: Pull-up circuit for altitude encoder tester needed.

>I have a difficult time believing that Shadin didn't put pullups in their
>product, but perhaps they did not.

Perhaps. I didn't call them or anything. I lost confidence in Shadin
because they coudn't repair this unit after I removed it from the
airplane and sent it to them. I got it back and fixed it myself. (bad
solder joint at the display connector)

When I power up the unit, with open pins, the display reads random
numbers. Grounding them quiets things down. (and changes the altitude)
I haven't checked it while connected to a xpdr. I think I will try the
10k resister idea next.

Thanks for the link to your website. Very interesting reading. I
thought I'd make one using the shadin unit since it was free and it
also reads out serial altitude from an encoder so equipped.

Earl

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