Hi guys, My question will probably looks very simple for most of you; but this is the first time I build an electronic device, so please accept my apologize by advance :)
The project consists in Nixie tubes (IN-12B) displaying numbers received via Wifi (on a HTTP service). I'm pretty sure things could be cheaper and easier, but for my first circuit, assembling bricks like legos is easier to understand than building everything from scratch. To do that, I have : - A Fonera (who manage the Wifi and HTTP part) - A Arduino receiving the digits to display from the FONERA via serial - 3 Ogilumen nixie kit (http://www.ogilumen.com/guides/driver.pdf) - And a HPVS 1363 from Tayloredge (http://www.tayloredge.com/ storefront/SmartNixie/DataSheets/Datasheet_1363-1364.pdf) Actually everything seems to work fine on the breadboard except that Ogilumen kit uses 74141 to drive the tubes so there is no way to fire the decimal point. I'll like to add this feature without redesigning the board. So my idea was to dedicate a PIN on the Arduino to this job and use a MPSA42 to switch on the dot when needed. I understood from the Neonixie-l FAQ that wiring is different if the DOT is used with or without digits. Let assume that I'll only use it when a digit is on. David Roger on the previous Yahoo group asked the same question (how to mix 74141 and MPSA42) (http://groups.yahoo.com/group/NEONIXIE-L/ message/43170) but unfortunately the final schematics was not part of the thread. So after reading this 2 documents : http://nixietube.info/NixieTransistors.pdf http://www.nixiana.com/Files/ntpclock/Csaszar-199.pdf I imagine the following solution (the dark black part of the schematic here : http://dl.dropbox.com/u/46332604/IMG_1045.JPG). I've to tell you that I didn't studied electronic and npn transistor is very obscure to me. If someone can confirm this schematics, that's will be great ! Thank you, Julien, -- 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.
