From: scientist77017@gmail.com   
      
   On Tuesday, May 14, 2019 at 7:29:08 AM UTC-5, amdx wrote:   
   > On 5/13/2019 9:22 PM, 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.   
   > >   
   > > :-)   
   > >   
   >   
   >    Are you know using the 555 circuit.   
   >                           Mikek   
      
   I do not understand your question.   
      
   Do you know of any circuit that will detect someone crossing a light path?   
      
   It does not necessarily have to use a laser.   
      
   Andy   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)