XPost: sci.electronics.design   
   From: erichpwagner@hotmail.com   
      
   On 16/04/2019 09:41, Piglet wrote:   
   > On 16/04/2019 09:27, Terry Pinnell wrote:   
   >> default  wrote:   
   >>   
   >>> I'd isolate the signal from the input to the CMOS gate....use relays   
   >>   
   >> Although having some negative practical downsides (like discarding the   
   >> case for a larger one) I might try that. I assume you simply mean taking   
   >> the noise-prone input to an NPN transistor driving a relay which then   
   >> switches +V (or a fraction of it) to the original relay driver? A sort   
   >> of mechanical, slower echo of the original?   
   >>   
   >   
   > Don't use a relay to directly clock the 4013 because the relay contacts   
   > will have bounce and cause multiple triggers so you'd be no better off   
   > as you'd need to clean up the relay contact bounce.   
   >   
   > I think the suggestion was to use relays throughout, as in:   
   >   
   >    
   >   
   > piglet   
   >   
      
   If rebuilding from scratch is too painful an idea then you might be able   
   to press the other half of the 4013 into making a crude level triggered   
   monostable to clean up the trigger for the existing toggle. Here is a   
   sketch:   
      
      
      
   piglet   
      
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