I can see the rationale for what you're talking about, Mike, especially if component count was a concern... But this is actually not what Will is doing. He has a separate uC that is functioning as a switching supply controller. Thus my rant about how "using a microcontroller instead of a 555 is more elegant"..
Oh, and the people who think more complex systems are more reliable than simpler ones? My fellow software-engineers. :( Although to be fair, it seems to be predominantly the ones who are application level programmers. -Adam On Sun, Feb 20, 2011 at 3:19 PM, threeneurons <[email protected]>wrote: > > On my dekatron clocks, however, I use a pair of pins off my uC, just > like Will is using. My implementation though is very simplistic. I use > the AVR's voltage comparator feature. Algorithm is real simple. In a > timer interrupt (20KHz or faster), I toggle the output bit, > alternately ON or OFF. During the phase when its suppose to be flipped > ON, the comparator is checked to see if the input is over the > threshold. If it is, I do not turn ON the output (which drives the > FET). Its turned ON only if its below the threshold. This simple > scheme works quite well. I've used it in supplies that deliver more > than 40mA, at nixie voltages. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
