From: gherold@teachspin.com   
      
   On Thursday, July 12, 2018 at 1:01:55 PM UTC-4, jurb...@gmail.com wrote:   
   > Generally, 5 volts is 5 volts. The price shouldn't be a major concern unless   
   you are building a million units. In, ground and out.   
   >    
   > At ½ amp you could probably shunt regulate it, a Zener would only dissipate   
   2.5 watts at no load. Not efficient but probably the cheapest option.    
   >    
   > Between the LM340XX-5 and the 7805, I'd get whichever is cheaper.   
      
   Thanks, I ordered the cheaper 7805... just wondering.   
      
   George H.   
      
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