PT6312-LQ среда, 29 января 2025 г. в 05:40:04 UTC+2, Moses:
> Hey Benoit! Long time no chat! > > Yes, setting the display via an mqtt topic should be pretty easy. The > latest firmware for the other clocks has a topic that it can monitor for > brightness changes.. easy modification to control the rest of the display. > > I've been drawing up the PCB in my spare time.. my main issue now is the > estimated BOM is going to be about $35 for low quantities (100 or so). A > bit more then I expected. The VFD drivers are the main culprit.. the > max6921 is about $14 for two! Does anyone know of a cheaper option for > driving VFDs? Even if I tie all the segments (8) together I still have 18 > grids to deal with, so at minimum I need a chip with 26 channels, and > preferably in a larger pitch (SOIC?) so soldering won't be a issue for most > folks. > > Regards, > -Moses > > On Tuesday, January 28, 2025 at 7:39:56 AM UTC-8 Benoit Tourret wrote: > >> I like the idea of a dual display, could it be possible to send data on a >> mqtt topic do feed the display when needed ? >> >> Please, count me for one kit. >> Regards, >> Benoit. >> >> Le mardi 14 janvier 2025 à 06:47:44 UTC+1, Moses a écrit : >> >>> Folks, >>> >>> I started working on a prototype IV-21 clock sometime last year. I got >>> to the point of an advanced prototype, ready to move to a PCB.. but life >>> got in the way. >>> >>> I never really bothered with VFD displays much before, but now they are >>> growing on me. This one is a good size for a more close up clock, it's been >>> my "desk" clock for about a year now. >>> >>> I can put this into production, I have plenty of tubes on hand, but >>> would like to see if there is any interest from the group. If I can get >>> 10-20 interested parties, I would pursue it to a production kit. My design >>> is as follows: >>> >>> Dual IV-21 tubes, as seen in the cardboard mockup. >>> ESP32 Xiao controller (NTP/wifi software based on my other clocks >>> www.neonixie.com) >>> Onboard DC-DC step up controlled by the ESP >>> Modern max6921 serial VFD drivers >>> >>> I like to see the date and/or UTC time along with local, so I like the >>> dual tube idea. >>> >>> Anyone interested? >>> >>> Regards, >>> -Moses >>> >>> >>> >>> [image: IMG_20250113_210103655-smaller.jpg][image: >>> IMG_20250113_210210178-smaller.jpg] >>> >> -- 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, visit https://groups.google.com/d/msgid/neonixie-l/02bca672-eb9c-4c01-a1b6-88afb503526en%40googlegroups.com.
