Karl ClarkeMar 12, 20181 min readKY-040 EncodersThese are cheap, and you need at least 30 for the whole sim. TRY TO FIND ONES WITH THREADS AND NUTS! It makes attaching to the panels much easier!https://www.ebay.co.uk/itm/10pcs-Rotary-Encoder-Module-Brick-Sensor-Development-KY-040-Fit-For-Arduino/191739337554?epid=1991591645&hash=item2ca48e1b52:g:BsoAAOSw6dNWSUzg
These are cheap, and you need at least 30 for the whole sim. TRY TO FIND ONES WITH THREADS AND NUTS! It makes attaching to the panels much easier!https://www.ebay.co.uk/itm/10pcs-Rotary-Encoder-Module-Brick-Sensor-Development-KY-040-Fit-For-Arduino/191739337554?epid=1991591645&hash=item2ca48e1b52:g:BsoAAOSw6dNWSUzg