XPost: sci.electronics.design   
   From: me@somewhere.invalid   
      
   I have a couple of simple 555 monostables, the first to delay the   
   triggering of the second.   
   https://www.dropbox.com/s/6uboy3fgd0ixhxa/GenerateNegPulse-1.jpg?raw=1   
      
   But I'm struggling to extract the brief -ve pulse required for the Main   
   mono. I thought it would prove simple. But bread-boarding various   
   combinations of R, C, diode and NPN or PNP transistor has so far not   
   yielded a winning combination.   
      
   All suggestions would be appreciated please.   
      
   Terry, East Grinstead, UK   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)