MEXICOWANDERER wrote:
BiPAP fixed. Crappy 5vdc power supply NPN blew. Soldered in a 7805 TO220.
Boy-O-Boy does that bring back memories.
At a major IC company for centuries I was running the group responsible for design of the high speed computer controlled test systems for analog/linear circuits. The TO220 regulator line was one of our responsibilities ... including the 78XX TO220 series. Hard to believe, but even way back then the testers for those circuits cost a cool $300K-$400K each. The power supplies in the testers had square outputs ... they were programmable to produce any spec'd current at any spec'd voltage and turn on and off in milliseconds ... as needed for the complete suite of tests that were completed in a few hundred milliseconds.
