Another problem with switch mode is PCB layout. I can't find any good guideline about this, but my simple 555 boost converter built on a prototype PCB was easily outputting 40mA at 200V (more than enough for most nixie applications) without radiators, reaching temperatures of 70°C. After I've made a PCB for it, same schematic and similar design it suddenly struggles to output half of that current! This Nixie Buffalo power supply looks great. I'm starting a project, which is a portable noval vacuum tube tester, and I'll consider it - I need at least 300V 100mA with regulation powered from a battery (probably a laptop battery).
W dniu czwartek, 13 lipca 2017 23:13:58 UTC+2 użytkownik gregebert napisał: > > I'd recommend experimenting with linear supplies first, before > experimenting with switchmode (boost, flyback). > Linear supplies are well-behaved, even when they are abused, and all you > really need for debugging them is an inexpensive DMM. > > For switchmode, a scope is an absolute must, and preferably a digital one. > Lots of strange, and often unexpected, things happen when you tweak a > switcher. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/63722991-f170-459c-95e6-0e56f08f94d3%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
