That’s a monster clock Greg! We can’t even see you standing next to it for scale ;-)
I’m just waiting for the day a cyber terrorist tries to hack in to my networked clocks :-) > On Jan 4, 2018, at 11:29 AM, gregebert <gregeb...@hotmail.com> wrote: > > My 8-tube b7971 clock is powered by a RasPi; I posted a video several months > ago before I built the case. > > Using the WiringPi library, you can get decent GPIO speeds; I've measured > about 2Mbits/sec when serialized completely by software. > The problem is that the Pi runs Linux, so there are random time-slices the OS > needs for housekeeping, so there will occasionally be gaps of a few > milliseconds. > For a clock, this shouldn't matter. This particular clock stores the segment > data in a shift-register, and the Pi serializes the bit stream for 8 tubes * > 16 bits/tube = 128 bits total. > I update the time every second, and I've never observed any display glitches. > > Why use a RasPi ? Many reasons. > 10USD cost. OK, yeah, that doesn't include a 4GB micro-SD card or a power > supply > Onboard WiFi, which means you can update software without opening-up or > moving the clock. Just login and patch. > Full goodness of Linux, and the zillions of apps you can install > Remote access via VNC > Low power > No need to set the time - Automatically obtains it from your network (unless > your network or internet service goes down) > As long as you are aware of the pitfalls of a RasPi, you can easily work > around them. In a few years I will find out if the OS causes the micro SD > card to 'wear-out' , or if my clock gets hacked by a cyber terrorist. > > > > https://www.youtube.com/watch?v=OjQeW67viXw > > > > > -- > You received this message because you are subscribed to a topic in the Google > Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/WIK2UWjMHPI/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > neonixie-l+unsubscr...@googlegroups.com. > To post to this group, send email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/0c50a801-a80f-4b3c-8d04-8590764b72bd%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- 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/63056563-7FEE-434E-BC38-F414A0F2F7C5%40gmail.com. For more options, visit https://groups.google.com/d/optout.
