zombiess wrote:Reducing the freq to the minimum needed should get you a pretty big gain in efficiency. Really easy to change since it's a 555 timer.
Yesterday I was a little bit "under the influence" when i tried to add a pot on the pcb so I could adjust de Freq., well as the story goes I found a schematic on the net for a LM339 based controller and totaly ignoring the fact that my controller uses a 555 timer I added a pot on the numer 2 pin of the LM339 instead of the resistor that was in place.Tested, worked ok I could adjust the freq down to about 7Khz. GREAT!
This morning ,fresh as a daisy,upon further reflection it came to me.... whats the point of the Ne555 timer??? hehe and after reading your post the confusion grew...
YEAH I can read a schematic, use some simple calcs to make adjustements,but I'm very new at this electronics stuff so most of the time I learn as I go...and forums like this are an invaluable resource.
So if you could please imform me as to why some controllers use just the LM339 and some like mine have the extra 555 timer?
PS. the schematic I used was this one http://www.swarthmore.edu/NatSci/echeev ... trolG.html