I’ve spent several months looking for nice industrial grade quality rotory optical encoders on E-bay but just not found anything at nice hobby prices avalible. Finally I stumbled upon B&G micro and they seemed to have a nice price on one without a lot of details provided. I went ahead and ordered two and they arrived today.
They are marked made by OAK/Grigsby, part # 91Q128-43-00410. I assume this means 128 steps per rev.
It has kind of a useless 4 pin connector on the end of the 5 inch 4 conductor solid wire flat cable. I just lopped off the connector and soldered the bare wire ends to a 4 pin header. I placed ground on pin 1 (marked with a stripe) and +5vdc on pin 4. Channel A & B are pins 3 & 2 respectively. I put my two channel scope on pins 2 & 3 and could see very nice quadurture square waves being generated as I turned the knob in either direction. Being optical there should be no contact bouncing like with mechanical encoders and the pules seemed nice and square to me.
The encoder has a nice feel with a solid drag and no detents, feels just like a quality hi-fi volume control feels. The body is 1" square and about 1/2" thick. It uses standard 1/4" knobs, so that is nice.
All in all this is quite the steal for $5 each (or $4 if 4 or more) in my opinion and as I said I’ve been looking for quite a while. Now I need to decide if owning just two is enough.
OPPS, forgot the link: http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=12916