From: lugnut808@spam.yahoo.com   
      
   On 4/04/2024 6:07 am, peter@easthope.ca wrote:   
   > A variable power adapter is required to drive a 6 V, 30 W incandescent   
   > bulb in a microscope.   
   >   
   > Similar to the 3-12 V 5 A adapter here.   
   > https://www.ebay.ca/itm/305207182573   
   > An adapter providing 1.5-6 V output would be better but I haven't   
   > found one.   
   >   
   > Rather than limit the adjustment to 6 V, I think of halving the   
   > output.  An integrated circuit in a 4 port package is conceivable.   
   > https://www.youtube.com/watch?v=VJfqBQ2ybpk   
   >   
   > Does the marketplace offer a solution?   
   > Another idea?   
   >   
   > Thanks,                  ... P.   
   >   
   >   
   >   
      
   If you connect two identical bulbs in series, then the voltage across   
   each will be half of the supply voltage. So, connect another identical   
   bulb in series. You won't find a simpler circuit!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)