I direct drived all 6 of them, delivering 12mA without a problem. Tested only up to 15mA. Didn't want to go further..
Thanks again On Mar 4, 11:29 pm, Adam Jacobs <[email protected]> wrote: > Disable the multiplexing, so that only 2 nixies are lit (and those lit > at 100% duty cycle). THEN measure the current draw. You will not be able > to accurately measure the peak current draw of a multiplexed nixie with > a multimeter. . and YES, you definitely need a current limiting resistor > or you will break your nixies. > > -Adam > > On 3/4/2012 2:26 PM, Imbanon wrote: > > > > > > > > > Hi all! > > > I have a question about multiplexed nixies (2x3 - 2 turned on at a > > time). > > First of all.. I cannot get a 2mA (or at least I think so) on my > > IN-14s. It lead me to completely remove the anode resistor! Can a > > nixie tube be harmed if it does not have an anode resistor? Without > > any resistors, I can get up to 1.8mA measured with my multimeter in DC > > mode. > > > So I figured to try to calculate it. I think that the multimeter in DC > > mode shows average readings (that's true, right?). So with the formula > > that the average current equals Vpp*T1/T, in which T1=4ma, T=13.6 and > > Iavg=1.8mA, Vpp equals 6.12mA. > > Is that really possible? I would say that the current would be much > > higher. My 555 supply is capable to deliver at least 15mA at 200V > > (tested). > > So with Vpp I calculated that by the RMS formula Irms=Vpp*sqrt(T1/T), > > RMS current is 3.32mA, which is impossible by my judgement of > > brightness. > > > I will hopefully get my hands on a scope this week to check out the > > real peak current. But is there anything I can do before, or even if I > > get a chance to use a scope? > > > Many thanks! -- 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.
