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I'm trying to find a way to translate small angle rotation into some form of digital signal. 1 degree resolution would be excellent, but something like 5 degrees would be ok.

I need something like a rotary encoder, but with much higher resolution, similar to what we see inside old rubber ball mouses, which have an encoding disk and IR leds/sensors to detect when the disk spins.

Is there any commercial component that would do that? Or I will need to build it myself?

Thanks in advance!

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    \$\begingroup\$ resolution of rotary encoders is expressed in pulses per rotation, you need something above 72 (5° per pulse) or 360 (1° per pulse). A quick google showed me several with 1024 p/r. \$\endgroup\$ – ratchet freak Aug 25 '17 at 13:09
  • \$\begingroup\$ @ratchetfreak, thank you! I didn't know about the PPR parameter, this is the key to find these encoders. \$\endgroup\$ – Marcovecchio Aug 25 '17 at 13:13
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Resolution of rotary encoders is expressed in pulses per rotation. One rotation being 360°.

In your case you need something above 72 (5° per pulse) or 360 (1° per pulse).

A quick google showed me several with 1024 p/r.

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