[misterhouse-users] Weeder Analog Input problem

[Kirk B. <ki...@ka...>]

Well, last night, I had my Weeder Analog input card working just fine.
Now it seems to have stopped working properly today.  I am using the
single-ended mode to compare voltages on four separate inputs to the
ground hooked up to COMMON.  

Unfortunately, today, every read returns some random number anywhere
from -3800 to +3794.  Every read returns a different value than the
previous read, even though the voltage on the inputs are stable.  I have
checked the inputs with my multimeter and the voltage is steady in both
DC and AC modes.

I at first thought this was caused by a floating ground, but I checked
and the ground has good connectivity.  I'm using a regulated, filtered,
9V power supply.

Anybody have any ideas?  I tried using the auto-zero function ("Z") but
that doesn't seem to change anything.

PS - if anybody out there is good with electronics... particularly if
you really understand transistors, I would love to have the opportunity
to bounce a question off of you.

-- 
Kirk Bauer <ki...@ka...>
http://linux.kaybee.org | www.autorpm.org | www.logwatch.org