6522 weirdity

From: John Lawson <jpl15_at_panix.com>
Date: Mon Dec 30 12:55:00 2002

On Mon, 30 Dec 2002, Sellam Ismail wrote:

>
> Now, I seem to have a problem with CA1. If I have CA1 connected to
> ground, it's stable. As soon as I remove it from ground and it's
> floating, CA1's state starts to fluctuate wildly for a little over 2
> seconds.


  Try tieing it to +5 via a 10K resistor, so it's either solidly a 0 or
solidly a 1. Many digital chips get cranky when their pins 'float'.
Sounds like what's going on. Vide Lancaster - TTL and CMOS Cookbooks for
no-bs info on interfacing.


  Cheers


John
Received on Mon Dec 30 2002 - 12:55:00 GMT