Re: Absolute encoder outputs
- From: Peter Bennett <peterbb@xxxxxxxxxxxxxxxxx>
- Date: Mon, 05 Oct 2009 10:34:25 -0700
On Mon, 5 Oct 2009 08:21:38 -0700 (PDT), "Capt. Skinny"
<cannedluncheonmeatobfuscator@xxxxxxxxx> wrote:
I am trying to emulate the single ended output of an absolute encoder
(I have the circuit but not the encoder). The encoder has a pinout
similar to the following:
1 24v supply
2 0v
3 bit 1
4 bit 2
5 bit 3
6 bit 4
7 bit 5
8 bit 6
9 bit 7
The output signal is 5v for high bit, 0v for low bit. I'm not quite
sure how to emulate the encoder's 5v signal to the circuit. Do I use
the signal lines as a sink for a small load @ 5v? If anyone can point
me to some introductory references, it would be greatly appreciated.
Clearly I did not design the circuit, I'm just trying to use it.
Thanks.
An absolute encoder I worked with had open collector outputs, if I
recall correctly - NPN transistors, with emitter grounded, and
collector to the output pin - pull-up resistors to +5V were required
at the receiver.
--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca
.
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