bieling@terra.es wrote:
Michael, Yes, I know the transformer is the way to go, but I cannot resist the idea of "tweaking" inside this power supply to make it go without using an "ordinary" transformer ... :-) How much heat does a 140*88/1000==12W "heater" generate ? Do you think that this will require a massive heat sink ? (please see my other post in this thread, I believe this dissipated power figure is correct)
Several square inches, with most of it in free air! You will definitely cook the case in the area of the heat sink. Think of putting a 50W light bulb in there... -michael Music synthesis for 8-bit Apple II's! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it is seriously underused."