From: asdf@nospam.com   
      
   On Wed, 12 Sep 2018 17:54:46 +0100, Terry Pinnell wrote:   
      
   > My starting assumption is a simple CR filter in front of a Schmitt.   
      
   Yup, that's probably the simplest and cheapest effective way.   
   But if you need more buttons to be debounced, a uC solution might   
   be more scalable and simpler so that the filter could be   
   implemented in software virtually using no components other   
   than the minumum necessary to have the uC run.   
      
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