From: scientist77017@gmail.com   
      
   On Tuesday, May 14, 2019 at 9:19:12 AM UTC-5, George Herold wrote:   
   > On Monday, May 13, 2019 at 10:22:59 PM UTC-4, AK wrote:   
   > > Electronic can be quite frustrating.   
   > >   
   > > I put together a circuit for a laser alarm.   
   > >   
   > > It does not work.   
   > >   
   > > There is no way to tell if a design will be successful even if you follow   
   the authors exact directions.   
   > >   
   > > I will keep plugging away and reading Practical Electronics for Inventors.   
   > >   
   > > :-)   
   >   
   > Hmm, Well a common pitfall when starting in electronics is to copy all   
   > of some circuit.  Plug it in and find it doesn't work.   
   > A better approach would be to build up one little part of it.. make sure   
   > you know how that little part is supposed to work, and confirm it's   
   > working as expected.  (Or not and go figure out why.)   
   > Then add the next little piece.   
   >   
   > Do you have an oscilloscope?   
      
   I have tested the individual parts of circuit that I familiar with. I do not   
   have a scope.   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)