# Encoder

Discussion in 'Homework Help' started by av.k10373, Nov 21, 2007.

1. ### av.k10373 Thread Starter New Member

Nov 21, 2007
2
0
Dear Sir,

Attached here some details of a 9 bits parellel output encoder.
Can we make a test circut with digital counter display unit in decimal
and binery mode ?

Spec: 9 bits output, 0 to 360* counting, 3000 rpm,

Thanks
Ajith karthikeyan
ajithkarthikeyan@yahoo.co.in

File size:
125.3 KB
Views:
20
2. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
Well, the output is already in binary, so that part is already done. Converting to degrees might be a challenge, as there are more than 360 counts/revolution. Unless, of course, you know more about the encoder that we do.

You could go through a lot of discreet logic to convert to decimal. Must the count in decimal be in degrees, or just be the equivalent number?

The first solution is going to need a microprocessor. The second can use several gates to monitor bit 1 & 2, and count up a decimal counter string.

3. ### GS3 Senior Member

Sep 21, 2007
408
35
One possible approach might be to convert digital to analog and then just measure the analog signal with a meter which will have its own built in ADC. That seems pretty simple.

4. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
It's going around Robin Hood's barn, but the D to A converter's output could be scaled to more closely work with the A to D to give an output that reads in degrees.

5. ### Ron H AAC Fanatic!

Apr 14, 2005
7,050
657
How do we know the output is in binary?

Jun 30, 2006
833
2
7. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
The OP has that information.

8. ### Ron H AAC Fanatic!

Apr 14, 2005
7,050
657
What information? (This is beginning to feel like "Who's on first?" by Abbott and Costello.)

9. ### GS3 Senior Member

Sep 21, 2007
408
35
If the output is in Gray code rather than straight binary then my suggestion does not work (obviously). I had not thought of that.

10. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
Nobody but the OP has any information about the encoder, other than it's got a nine bit output.