Comments on: Rotary Encoder from a VW Car Stereo

By: Alberto

Alberto — Mon, 07 Jul 2008 21:26:53 +0000

Another simple how-to encoders work:

http://www.nutchip.com/progetti/encoder_led_en.htm

and a simple encoder-driven display:

http://www.nutchip.com/progetti/encoder_display_en.htm

By: Russ

Russ — Mon, 07 Jul 2008 16:43:49 +0000

jeanyves: Thanks, great link. Those encoders are a good price – cheaper than Digi-key.ca even, including shipping costs.

By: Keith Neufeld

Keith Neufeld — Mon, 07 Jul 2008 16:40:29 +0000

s, there are several schemes for reading quadrature in half- and full-stepping modes, and I talk a little more about the details of decoding in yesterday's LED Calculator with Rotary Quadrature Encoder for Target System Voltage Selection.

By: s.

s. — Mon, 07 Jul 2008 10:23:46 +0000

Actually, instead of determining -which- sensor changed state, all you need is the fact of state change of any of them, current state of one and previous state of the other.

Say, you poll the channels and remember their states one cycle back. The channels are A, B and their values the moment before are A’ and B’.
Now if A=A’ and B=B’ – the wheel didn’t move or moved undetectably small amount. If any of them differs, A XOR B’ determines the direction of rotation.

By: Keith Neufeld

Keith Neufeld — Mon, 02 Jun 2008 01:05:22 +0000

Emailed Brent May 30.

By: Brent

Brent — Fri, 30 May 2008 23:31:40 +0000

If you still have the rest of the deck I might be interested in it for a project of mine.

By: jeanyves

jeanyves — Sun, 04 May 2008 11:58:51 +0000

just for your information I bought 10 of these new ones on ebay here
http://cgi.ebay.com/12mm-Rotary-Encoder-Switch-With-Keyswitch-10pcs_W0QQitemZ230248142254QQihZ013QQcategoryZ67003QQcmdZViewItemQQ_trksidZp1713.m153.l1262
for really cheap price !
not worth destroying your VW radio…