Farnell's Rotary Encoder 733-726

[keithdoxey]

I have used these encoders and still have problems, I tried code supplied on this forum and it still does the same thing, it jumps up by 2 values instead of one ( rotate right one click generates 2 counts ). I do have the board set up still so I will try both code examples and advise.

Nigel, Queensland, Australia

Hi Nigel,

I am about to use a rotary encoder for the first time and whilst trying to confirm the pinout with a multimeter I couldnt get any readings across any pins. I then went and found the datasheet and discovered I have bought a high resolution encoder.

My encoder has 24 detents in common with many others, but many of the encoders have only 6 cycles per revolution so 4 clicks to go through 00,01,11,10

Mine apparently has 24 cycles per revolution so a single click travels through 00,01,11,10 and back to 00. Basically whenever the encoder is resting on a detent BOTH switches are open. I confirmed this by using LED's and you can see the 4 steps during each click.

Given that the code above will generate an output count whenever 00 or 11 are presented I guess that using the type of encoder I have will give a count of two for each click.

Just need to code for that now

Regards

[Dave]

keithdoxey, I am the one that supplied Nigel with the code and it works perfectly with a standard encoder, however the encoder you have selected as well as Nigel are ment to be used in low power situations. That is why the encoder seems to be open circuited at rest or in the detented position. As I told Nigel, take the encoder count and divide it by 2 is the easiest way to use these type of "low power" encoders.

Dave Purola,
N8NTA

[keithdoxey]

As I told Nigel, take the encoder count and divide it by 2 is the easiest way to use these type of "low power" encoders.

Hi Dave,

Excellent idea. Just because I need a result of 0-63 doesnt meant I cant use an encoder value of 0-126 in steps of two.

Will give it a try later.

Thanks