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Arduino - Reading Rotary Switches

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Nothing too exciting or original, but finding this a useful technique! 😎

"Surround" the rotary switch with 1k resistors, connect to the supply
rails and voila -- Read it out with ONE analog pin! In diagram form:


Personally I have found it *much* easier to implement using the following
SQUARE switches. Found on Ebay etc., ... I buy mine from TME Poland!


A bit fiddly... I use Veroboard in this weird "double sided" way... 😛


Here's some I made earlier! New 3-way + 4-way and early prototype 8-way! 🥳


I usually chose resistors to TOTAL 10k Ohm. Hey, HTH someone sometime! 🙂

Edited by Macavity
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