Comments on: LED Calculator with Rotary Quadrature Encoder for Target System Voltage Selection

By: Atakan

Atakan — Thu, 25 Aug 2016 19:39:50 +0000

Hello. i am using this great library on my Arduino Mega. Works perfect but i want to work with Arduino Due atsam3x8e mcu. i cant uploat to Arduino Due i got some arrors because different Timer codes. is it possible to adapt Arduino Due ?

By: Raph

Raph — Mon, 04 Apr 2011 23:44:59 +0000

I don’t get an oscilloscope. Alps are really good rotary, we can find them in a lot of audio desk mixer.
The question is, must I have to provide 5v to A and B pins thru 10k resistor or plug it directly to the digital input of arduino ? (considering the datasheet of alps).

Arduino mega works very well and with no trouble.

By: Keith Neufeld

Keith Neufeld — Mon, 04 Apr 2011 13:16:21 +0000

Raph, I don’t know — I don’t have that encoder, so I haven’t had an opportunity to test it myself. I also haven’t tested the library on the Arduino Mega yet; perhaps there are compatibility problems.

Have you checked the encoder with an oscilloscope to find out whether the false triggers are coming from the encoder or from the software? Perhaps the encoding traces are slightly misaligned with the detents and you really are getting false signals from the encoder rather than from the software.

By: Raph

Raph — Mon, 04 Apr 2011 13:04:47 +0000

Is that sketch correct for using with ALPS rotary encoder ?

link : http://fraph.free.fr/arduino/ArduinoEncoder.jpg

ref of alps rotary encoder :

http://fraph.free.fr/arduino/alps.pdf

Thanks.

Sometime, the encoder sends false information and the values move up or down without any reason. Can you help me about this point.

I use 10 rotary encoders with an Arduino mega.

and use Digital input from 32 to 49 and 29 and 31.

By: Ben Zonneveld

Ben Zonneveld — Mon, 21 Mar 2011 20:49:51 +0000

Btw…pin 13 will probably give some problems because of the LED on this port. I Solved this by removing the led from the arduino

By: Keith Neufeld

Keith Neufeld — Fri, 18 Mar 2011 15:11:08 +0000

Ben, obvious fix that I’d forgotten! Thanks!

By: Ben Zonneveld

Ben Zonneveld — Fri, 18 Mar 2011 15:06:26 +0000

Quadrature.h:

#define DIGITAL_PINS (13)

Increase the value here to 20 and you can use all pins

By: Keith Neufeld

Keith Neufeld — Fri, 18 Mar 2011 11:41:14 +0000

Max, I recall having some trouble getting it to work on some of the higher dedicated digital pins — 12 or 13, perhaps — and not having figured out why.

For the analog pins, are you listing their digital pin numbers as A0, A1, etc.? I don’t know of a reason offhand that that wouldn’t work.

By: max

max — Thu, 17 Mar 2011 17:11:04 +0000

hey, thank you very much for your great work, your library really helped me to get my rotary encoders to work!

I was just wondering if it’s me or if it’s the library that I cant use the decoders on digital pins 14 – 19 (aka analog 0 – 5) on an arduino? I’d like to so because I’m planning on adding some wireless function and would need the other digital pins to interface with the wireless hardware.

By: Stefan

Stefan — Sat, 15 Jan 2011 13:53:44 +0000

Great library, very easy to work with. Also works pretty reliably with my ALPS encoder.
Two things though: 1) To get it to compile, math.h had to be included first, so I added an #include “math.h” in Quadrature.h _before_ including WConstants.h. Works great now, but took me a moment to figure it out.
2) With the Bourns encoder, position() changes by at least two with every click on the encoder. It would be nice if the library could “half the steps” or so for these types of encoders.
Nonetheless: Great work, thanks