# Encoder

#### av.k10373

Joined Nov 21, 2007
2
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

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#### beenthere

Joined Apr 20, 2004
15,819
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.

#### GS3

Joined Sep 21, 2007
408
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.

#### beenthere

Joined Apr 20, 2004
15,819
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.

#### Ron H

Joined Apr 14, 2005
7,053
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.
How do we know the output is in binary?

#### mrmeval

Joined Jun 30, 2006
833

#### beenthere

Joined Apr 20, 2004
15,819
The OP has that information.

#### Ron H

Joined Apr 14, 2005
7,053
The OP has that information.
What information? (This is beginning to feel like "Who's on first?" by Abbott and Costello.)

#### GS3

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

#### beenthere

Joined Apr 20, 2004
15,819
Nobody but the OP has any information about the encoder, other than it's got a nine bit output.