I tried doing something similar, and that's how I came up with the vibration effect, which is really just a failed attempt at cross fading. I'm not sure whether the limitation is with the hardware or software, probably both. Writing to registers rather than using digitalWrite() may speed it up enough. That can be someone else's project at this point, I don't think I'll spend more time on it for now.
The clock on the Metronome in Union Square, uses 15 digits. Time, time to midnight, and 1/100 seconds in between. I think 1/10 makes more sense because at least you can see the digits. I like your idea better, but a combination would make it very interesting. Here's the info: https://en.wikipedia.org/wiki/Metronome_(public_artwork) On Wednesday, August 19, 2015 at 11:55:34 AM UTC-4, gregebert wrote: > > > I don't see a way to dim just one digit. With multiplexing, as each >> digit is selected the PWM rate could be set >differently, but I don't see >> how to do it with direct drive. >> >> Dimming individual digits is possible with hardware control, but probably > not with software. The idea is to resend the serial data to the HV5530's > twice every few milliseconds or so: Once to turn off the digit(s) to be > dimmed, then again to turn all digits on. By adjusting the on and off > times, you are doing PWM. I have 2 cascaded HV5530's (64 bits), and I clock > them at 1.5Mhz, so it's possible to do PWM up to a few kHz. > > > >> A 14 digit IN-18 clock sounds interesting. What are you doing with the >> extra digits? >> > > I went overboard, so it displays hours, minutes, seconds, date, month, > year = 14 digits. My wife saw the nixie clock in the movie "Tomorrowland" > and ordered me to build one for her (yeah, like I'm going to say no ???). I > saw no purpose for 12 digits, so I super-sized it to 14 digits. To > level-out the tube usage, I swap date and time locations hourly, then run a > depoisoning routine at 4AM for 1 hour. > > The clock will be in our vacation home, so the tubes will be off most of > the time. It will be an art-deco theme, in a wooden case complete with 2 > large toggle switches and 1950's-era incandescent panel lamps. I expect it > will be 30 inches wide x 5 inches deep x 5 inches tall. I'm leery about the > reliability of non-Burroughs tubes, and we already have 3 nixie clocks > running 24/7 (why not, they are Burroughs tubes....) in our permanent home. > -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/a3c6259a-3219-4403-9913-6bc82df603ff%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
