Hi everybody,
Was wondering if there is a sensor for Arduino that I can feed a line or a rope through it and it will calculate its length as it passes through it ?
If not, would it be possible to connect the below counter to the Arduino and control it by the Arduino?
For example controlling the line length by programming the Arduino to control a motor as a spool and makes it stop or move when the counter reading reaches a specific length ?
No, but you can sure make one with a wheel a rotary encoder and some math but nice idea! 
similar project from the past with some tips are here - Length counter - Project Guidance - Arduino Forum -
MikeLemon:
No, but you can sure make one with a wheel a rotary encoder and some math but nice idea!
A wheel rotary encoder sounds like a great idea !
I have also read some articles about optical rotary encoders used in robotic applications, so I am not sure which one to go for !!
But doesn't the digital fishing line counter above use the same principle?
I am thinking that it might have a built-in encoder either an optical or a mechanical one !
I couldn't find the technical specs and parts for it online.
But lets say it is true, would it be possible to wire it to the Arduino and program it to do the job ?
robtillaart:
similar project from the past with some tips are here - Length counter - Project Guidance - Arduino Forum -
Thanks Rob 
