Hi Will, Yes, this is definitely too low and also definitely unwise. Try to get as close as possible to the nominal current (2.5ma in this case).
Jarek: Is there a reason that you can't use multiplexing in this application? I'd think a 15 nixie display would be one of the best reasons for multiplexing. -Adam On Tue, Feb 15, 2011 at 9:09 PM, will <[email protected]> wrote: > I use my IN-14s at 170V with a 16.5K anode resistor. It uses about > 1.7-1.9mA depending on the digit. I'm not sure if this is wise, > however-does anyone think this is too low? > > I can't advise you on the massive power supply you need, but do you > mind explaining why you need so many tubes? It sounds pretty awesome. > > On Feb 15, 10:28 pm, Jarek <[email protected]> wrote: > > After finishing my last nixie tube clock project successfully ( > http://www.soniktech.com/nixie.php), I've wanted to try something bigger. > > I've started working on the control logic of a 15 digit clock (long > > story), but I'm running into a little problem with powering the thing. > > I've decided on IN-14 tubes, as they were the cheapest I could get in > > that quantity. Previously I've used salvaged Burroughs tubes, which > > were amazingly well documented. The docs for IN-14s is a little more > > sparse to my knowledge. I've found the following information: > > > > Anode Voltage: 170V > > Current: 2.5mA > > > > I'm a little confused as to what current limiting resistor I should > > use at the anode for each digit. I'm using russian 74141 chips to > > drive each tube, so I'm going to use one resistor per tube at the > > anode. Previously I've used an allspectrum.com nixie SMPS to do the > > job, but from its datasheet I've noticed that it peters out at around > > 25mA @ 180V, less than the 37.5mA I need. I've stumbled across this: > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140426808956#shId. > > Would this work for my situation? Also, which resistor should I use at > > the anode of each digit? > > > > Another question, because of space constraints, I'm going to have to > > keep the SMPS off-board, probably vertical to the board. The one I > > have linked has a 10 pin header, how long can the wires be from the > > board to the SMPS? > > > > Thanks for your help, and I'll post plenty of pictures when it's done > > =] > > > > -Jarek > > -- > 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. > > -- 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.
