On Thursday, May 16, 2019 at 7:17:30 AM UTC-7, AK wrote:   
   >    
   > ...I had to replace the piezo buzzer with a led....   
   >    
   If you can light a LED, you should be able to make noise with a piezo buzzer.   
      
   Your piezo may only be a speaker that also needs an oscillator to make a   
   tone.   Does it make a click when you wire it directly to a battery in either   
   direction?  Or, when you put it on your ohm meter, does it initially show some   
   conductance but slowly    
   shows as higher resistance?   
      
   If it is a sound maker, you may have it wired backwards.  Or it may be dead   
   (not likely).  If it is working, it should make noise when you wire it   
   directly to a battery with the correct polarity.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)