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DPRG: detector for encoder wheel

Subject: DPRG: detector for encoder wheel
From: Brad Garton bgart at iadfw.net
Date: Fri Sep 24 08:21:29 CDT 1999

On Fri, 24 Sep 1999 08:26:22 -0500, you wrote:
Rob thanks, Send the encoder software this way. 
I'm interested in hearing about your board for some future (smaller)
robots.  For the contest I have decided to use a new chip from work,
in my robot (So I can play with robotics AT work). I'm writing code
now. I have two chips coming that will be a lot better but they will
have to wait for the March contest. 
I probably wont be ready for October, but I seem to be getting a lot
more done on my robot with this contest coming up. 

What day are we looking at for the contest in March?

I hope to make some more progress this weekend. 

Less than a month to go.....

>2 answers:
>1. Nuts & Volts June page 70  show how to use 2 very small QRB1114 IR Reflective
>sensors with a 74HCT14 Schmidt trigger for a Quadrature encoder.
>2. I have made a PCB that mounts with the 2 screws on the end of a standard
>Servo. It uses the 14 pin DIP, 2 QRD1114s and 4 resistors, and a 5 pin
>connector. I use the same pin out, as IRPROX that Jeff Koenig put on the DPRG
>site as, for all my Sensor connections.
>Dennis Draheim and I are working to get it going with a 16F84 so we can talk to
>the 2 R/C servo "gearhead" motors and 2 encoders with a TTL, Half-duplex, serial
>2 wire connection. I have the PCB in Eagle if you want it.
>As far as the wheel encoder printing, James Vroman  gave me a copy of  the
>"Encoder" software in Windows. He got if off of an Seattle Robotics Email I
>think. It works in Post script (filename.PS) and I can't get it working.
>Want it?
>Keep us updated on your progress!
>Robert Jordan
>Brad Garton wrote:
>> I am looking at adding the encoder wheels to my new motors on Tom Servo:
>> Any body have suggestions on small, self enclosed, easy to find, cheap
>> detectors.
>> (any three of the above would do)
>> Also someone had a link to a pdf or gif file for a good encode wheel. I want
>> to print this onto a CD label and stick it directly on the back of my wheel.
>> Anyone know where the link is?
>> I have heard about the Hamamatsu P2255 and P5587, but can't find any data
>> sheets or a source to order these anyone know where to get them?
>> Brad


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