Comments for Circuits@Home

Comment on A reel of ADuM4160 ICs has arrived by oleg

oleg — Wed, 28 Jul 2010 22:29:35 +0000

Hi Soren,

I do like it and use it quite often; just don’t have time to write anything. Maybe in the fall…

Oleg.

Comment on A reel of ADuM4160 ICs has arrived by Soren Kristensen

Soren Kristensen — Wed, 28 Jul 2010 21:10:42 +0000

Hi Oleg,

I guess you did not like the USB2ISO adapter?

Can you provide some feedback as to what you do not like?

In advance thanx,

Best Regards,

Soren
Electronics-shop.dk

Comment on Reading rotary encoder on Arduino by janosch

janosch — Tue, 27 Jul 2010 06:07:00 +0000

nooooo i turn serial output off…but im not a programmer and im struggeling to put together the code but today i will try your code and just read out the encoder and than try to find an code that compares two encoders …if you have one drop me a line :-)

cheers janosch

Comment on Reading rotary encoder on Arduino by oleg

oleg — Mon, 26 Jul 2010 21:59:01 +0000

It will probably work fine if you don’t do anything which would slow down the Arduino too much (like serial output, for example). You may want to connect both encoders to speed things up.

Comment on Reading rotary encoder on Arduino by janosch

janosch — Mon, 26 Jul 2010 21:49:48 +0000

Hey Oleg! Very interessting code!
im Using also an Arduino and lady ada motorshield for my follow focus. here is a smal video of the follow focus. http://vimeo.com/12331846 so far i use a normal potentiometer but the feedback is not so good. than i found this video on youtube: http://www.youtube.com/watch?v=AEdMgZGbc9Q this guy uses two rotary encoders one for the dc motor and one for the input…do you think this is possible with your code for reading this motor http://www.robotstorehk.com/motors/doc/emg30.pdf and use another encoder for the input?

thx janosch :-)

Comment on Reading rotary encoder on Arduino by didier

didier — Mon, 26 Jul 2010 08:17:27 +0000

One of the best starting points to rotary encoders. Here is a link to my personnal works on encoders http://didier.longueville.free.fr/arduinoos/?p=485

Comment on Reading rotary encoder on Arduino by Steffen

Steffen — Sat, 24 Jul 2010 17:04:08 +0000

Hey Oleg,
finally it´s working really good! I did something like this:

tmpdata = read_encoder();
if( tmpdata ) {
if( tmpdata == 1 ) {
count++;}
if (count==4){
Serial.println(”Left “);
count =0;}

if( tmpdata == -1 ) {
count–;}
if (count==-4){
Serial.println(”Right “);
count =0;}
}

Sure, not like a pro would do it, but in the end it gives me a command every click and in my software wich i want to control, the encoder works exactly like it should.

Again, thank you very much, you helped me a lot!
Steffen

Comment on Controlling robotic arm with Arduino and USB mouse by GeorgeFlacker

GeorgeFlacker — Fri, 23 Jul 2010 10:45:40 +0000

This is so Awesome. Thank you for posting and give inspiration to all geeks in the world!

God Bless.

Comment on Reading rotary encoder on Arduino by oleg

oleg — Fri, 23 Jul 2010 01:04:53 +0000

You have 4 valid states for clockwise direction and 4 for counterclockwise, it gives you 8 states. In total, you have 16 possible states ( 4 for each position times 2 for the rotation times 2 for the direction ), half of them invalid. The program reads encoder, shifts the result and reads it again. The result – 4-bit number, is array index. That’s why there is 16 elements in the array.

There are many ways to derive this array, the easiest to understand is just write down all valid combinations from tables above ( 0001, 0111, 1110, 1000, etc.), get array indexes by converting from binary to decimal, filling array elements with proper increment, and then fill the rest of the array with zeroes.

Comment on Reading rotary encoder on Arduino by Gurb

Gurb — Fri, 23 Jul 2010 00:41:32 +0000

Hi, Thanks for the reply.

I now understand the 1,-1,0 but I still do not understand how do you get 16 states and more importantly in that order.
(I read this link but could not understood).

Gurb