Hi, Roman I hope you are felling better. Motorcycles can be very dangerous sometimes. I know many people that reconsidered that option of transportation because of the risks. Sometimes the crashes get more scary than the fredoom fellings. Take care.. No getting back to the SMPS. I will have an application where I will have to make a supply with 74 volts DC input and 24 v at 300 ma and 5 v at 30 ma. I am thinking about using 2 of your 2 transistor designs modified to the my specific needs. When I finish it I will let you and the list know how it goes and what modifications are needed. You, Russel and Dave gave us one of the most interesting threads the list has had in quite a while. I hope I can give back some information from the gained knowledge. Best regards, Alexandre Guimaraes -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu