Simple & Cheap Decoder Circuit Diagram for Rotary-Encoder

Indo_FS · 04-12-2002, 03:31 AM

[font size="1" color="#FF0000"]LAST EDITED ON Apr-12-02 AT 03:44AM (EDT)[/font][p]
This will accept mechanical or optical rotary encoder :

http://www.geocities.com/indo_fs/encoder.jpg

or try this address :

>http://www.geocities.com/indo_fs/encoder.jpg<

Indo_FS

Indo_FS · 04-19-2002, 04:46 AM

Or this pictures :

http://indofs.freewebsitehosting.com/encoder.jpg

Francisco

Indo_fs

Indo_FS · 05-06-2002, 08:47 AM

[font size="1" color="#FF0000"]LAST EDITED ON May-06-02 AT 08:48AM (EDT)[/font][p]Or this :

http://www.angelfire.com/linux/indofs/encoder.jpg

Francisco

Indo_FS

sewells · 05-06-2002, 01:37 PM

sorry, broken links

http://www.flightsim.com/dcforum/Use...874916530e.jpg

Indo_FS · 05-11-2002, 09:01 AM

[font size="1" color="#FF0000"]LAST EDITED ON May-11-02 AT 09:36AM (EDT)[/font][p]
Then goto this website :

http://indofs.tripod.com/

That site is for the scematic only...

IndoFS

badfish · 05-11-2002, 01:40 PM

Where did you get that diagram?

badfish · 05-14-2002, 10:19 AM

incase you havent notice... the diagram you posted wont work... because the pin #14 is grounded. it's supposed to be connected to the Vcc(5volts).

correct me if im wrong...

Indo_FS · 05-15-2002, 07:40 PM

[font size="1" color="#FF0000"]LAST EDITED ON May-15-02 AT 08:01PM (EDT)[/font][p]Yes, you are wrong :) , and the circuit works fine.

Although I forgot to add Vcc marking, but if you know (or have the data sheet for those ICs) that pin 14 is for Vcc then it explain everything...

See the NOT gate of IC1 of pin 10-11, there.. you see? It clearly show between the Vcc and Ground (up-line for Vcc, down-line for Ground).

And yes the rotary common pin is connected to Vcc, unless you have a different type of Optical Rotary Encoder that requires grounded common pin then you should easily convert/change/modify the input part.

The greatness of this circuit is the IC2 part, because it's simple, you can even eliminate IC1 if you'r using Mechanical-Rotary-Encoders.

http://indofs.com/images/encoder.gif

Indo_FS

http://indofs.com/images/indofs.jpg

badfish · 05-15-2002, 09:16 PM

thats a better circuit now...:D but im confuse... what is that grounded connection between 11-10 and then connected to the vcc? can that short circuit the vcc and ground? can you explain more? because i want to use your circuit but i cant understand how you make it work? By the way, im using a mechanical rotary encoder.

Thanks