At 10:45 PM 7/23/01 -0300, Edson Brusque wrote: >Hello, > > now I'm thinking about using a small signal transistor (BC548) to give >the TIP41 more current. > > Someone can point me how can I connect the two? May I use it the >Darlington's way? Sure, just make sure you have that turn-off resistor on the base of the TIP, otherwise leakage from the first transistor may cause it to be partially on, and get rather hot, when it should be off. -- Dave's Engineering Page: http://www.dvanhorn.org I would have a link to http://www.findu.com/cgi-bin/find.cgi?KC6ETE-9 here in my signature line, but due to the inability of sysadmins at TELOCITY to differentiate a signature line from the text of an email, I am forbidden to have it. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.