For your application, you'll of course not be using the MAX7219. Since you only need two digits, I think the easiest way would be to use two a couple 74141 BCD-decimal decoder/drivers, with the inputs directly connected to one of the Arduino ports. The logic would be extra-simple, since there would be no multiplexing on the outputs, and the two-digit value could just be converted to BCD and dumped directly onto the output port (perhaps being inverted).
The 74141 chips might be a bit difficult to source, but the Russian equivalent K155ID1 is readily available on eBay, and is cheap - This seller <https://www.ebay.com/itm/6-pcs-K155ID1-SN74141-155-1-Nixie-Tube-Driver-New-2018-USA-SELLER/332788800592?hash=item4d7bc21c50:g:3yYAAOSwfHVbR5x3> has a set of six for nine bucks (plus shipping), and is in the USA, so the current long shipment times from eastern Europe would be avoided. ~~ Mark Moulding On Thursday, June 18, 2020 at 3:48:16 PM UTC-7, Derek Schuetz wrote: > > Hi Everyone > > I want to make a 2 Digit Nixie Tube Counter that is battery powered with 3 > buttons (+1,-1,Reset). pretty much want to create the same idea as below > but i would design a case and condense it down, > > [image: Magic: The Gathering Nixie Life Counter | Hackaday] > > I am digging around to try and find a guide to follow. I have zero > experience in this whats so ever, but this seemed like an easy project to > start with. > > What i am assuming I could do I is take an arduino project for a MTG life > counter such as this ( > https://cerkit.com/2018/09/16/building-a-magic-the-gathering-life-counter-with-arduino-and-max7219/) > > and replace the two digit segment displays with 2 Nixie tubes. what i am > hitting for a roadblock is what exactly do i need to power and wire them up > with a battery and only do 2 digits rather then a clock. > > I have currently > IN-17 Tubes > Arduino Micro > > Things I Think I need > https://www.shop-tes.com/1363-hvps-vertical-high-voltage-low-noise/ (only > power supply i can find that seems to step up low voltage to where i need > it if you have some other suggestions let me know) > 3.7V Lipo > Lipo Charging circuit > Nixie drivers (link to some would be awesome i see so many options not > sure what would be best in terms of price and speed of shipping) > > I am not sure what am missing and is there maybe already out there a 2 > digit socket board for IN-17 that i could use? And then the next step after > sourcing everything would be how to wire it to the project i had linked > above. > > thanks so much in advance hopefully this will be a good kickstart into the > world of arduino and nixie tube projects > -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/19862ee8-06e3-4010-b357-f89bca8949c8o%40googlegroups.com.
