Re: [CAD_CAM_EDM_DRO] Differential to TTL

Hi Glen:


If using a breakout baord that takes 3.5 volt signmals, you need nothing, just ignore the A- and B- pins and hook up A+ and B+ .. Its nice to have differential for encoders generally, but for MPG's it isnt as important. With over 6 years and too many letters to count on encoder issues I can tell you only about 5% of single ended encoder users ever have any issues, and never with MPG's. MPG's tend to have about 200 counts per rev or so, and the pulse timing from them tends to be very low frequency.. ( How fast can you rotate a wheel. :) ) , so Id just use the A+,B+ signals in your case.


Thanks,
Art

----- Original Message -----
From: roboticscnc
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Wednesday, August 27, 2008 4:07 AM
Subject: [CAD_CAM_EDM_DRO] Differential to TTL


Hi Group,
I have a differential encoder ( MPG ) that I need to convert to single
ended. I'm using the 0v and A, but the high is only 3.25 volts. I seem
to remember that you can use a resistor between A & -A but not sure
how to connect the rest or the circuit. I would prefer not to use
another IC if possible. Maybe a coupling capacitor ?
Thanks,
Glen.






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