A quick update on the 2 x SP-353 display project. I have settled on a design that will drive two (or more later) SP-353 displays as a 6 digit clock. In order to keep things as small as possible the design stacks three boards. One for the displays, one for the drivers and one for the controller and power supplies. Also, in the spirit of keeping things small I have opted to use an NCH8200HV to generate the HV supply. I still get surprised when I design something on screen which can fill the entire screen space and then I print it out at 1:1 and realise that the thing is relatively tiny!
I should get the boards back in a couple of weeks and hope to have something to show soon after that. We are still in lockdown in the UK so I have had a bit of time to work on this. Whilst my original idea was to make a 6 digit device to act as a clock - does anyone - (apart from those who may have already mentioned it) see an application for a version that drives 3 x SP-353 (9 digits) or even 4 x SP-353 (12 digits) ? - Richard On Thursday, 12 November 2020 at 14:35:01 UTC GastonP wrote: > Beautiful clock and that case is gorgeous! > > On Thursday, November 12, 2020 at 11:01:32 AM UTC-3 dixter wrote: > >> Very nice... would be nice if a kit was to come available... :-) >> >> On Wednesday, November 11, 2020 at 5:13:14 PM UTC-6 [email protected] >> wrote: >> >>> Well done! Looks great! >>> >>> On Wednesday, November 11, 2020 at 2:20:02 PM UTC-5 M1 wrote: >>> >>>> No, >>>> >>>> I don’t want it for a clock. 😊 >>>> >>>> >>>> >>>> www.VoltageGoat.com >>>> >>>> >>>> >>>> >>>> >>>> Michail >>>> >>>> >>>> >>>> *From:* [email protected] <[email protected]> *On >>>> Behalf Of *martin martin >>>> *Sent:* Wednesday, November 11, 2020 7:17 AM >>>> *To:* neonixie-l <[email protected]> >>>> *Subject:* Re: [neonixie-l] SP-101 Clock, finshed at last! >>>> >>>> >>>> >>>> Michail, you want to display milliseconds? >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> ~ >>>> >>>> *[email protected]* >>>> >>>> >>>> >>>> >>>> >>>> On Wed, Nov 11, 2020 at 6:14 AM Michail Wilson <[email protected]> >>>> wrote: >>>> >>>> I’m interested. >>>> >>>> >>>> >>>> Also, would it possibly be adaptable to a 3x display? (9 digits) >>>> >>>> >>>> >>>> Michail Wilson >>>> >>>> 206-920-6312 <(206)%20920-6312> >>>> >>>> >>>> >>>> *From:* [email protected] <[email protected]> *On >>>> Behalf Of *Richard Scales >>>> *Sent:* Wednesday, November 11, 2020 2:18 AM >>>> *To:* neonixie-l <[email protected]> >>>> *Subject:* Re: [neonixie-l] SP-101 Clock, finshed at last! >>>> >>>> >>>> >>>> Would anyone with SP-353's or even SP-352's be interested in a direct >>>> drive version of this clock using HV6522 drivers and driven from a Wemos >>>> micro? >>>> >>>> >>>> >>>> I'm hatching a cunning plan.... >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> This is a display board for SP-353's, behind this would be a board with >>>> HV5622's then behind that the controller and power supplies etc. >>>> >>>> >>>> >>>> should I carry on or give up now? >>>> >>>> >>>> >>>> - Richard >>>> >>>> >>>> >>>> On Wednesday, 11 November 2020 03:18:32 UTC, Richard Scales wrote: >>>> >>>> I'd be interested in that - please keep me posted. >>>> >>>> Richard >>>> >>>> >>>> >>>> On Tuesday, 10 November 2020 16:34:52 UTC, Bill Stanley wrote: >>>> >>>> It might be a bit premature but I am working on a MK5017 emulator. It >>>> is a 2 board stack the size of the Mostek chip that (hopefully) plugs into >>>> the socket to replace the original chip. >>>> >>>> The top board holds an 8051 chip (SiLabs C8051F381-GQR) and a DS3231S >>>> clock chip. The lower board has the 15V to 3.3V power supply and the >>>> 3.3-15V translators to look like PMOS logic. I also have a development >>>> board with power supplies, drivers, switches and 7 segment LEDs to >>>> simulate >>>> the main clock for code development. There is also a connection to allow >>>> GPS + PPS synchronization. >>>> >>>> >>>> >>>> The PCBs are in and as soon as I can work with a microscope, I will >>>> assemble and work on the construction. >>>> >>>> >>>> >>>> I will make everything available including OrCad schematics, Allegro >>>> layouts, bare PCB, code etc for anyone interested. >>>> >>>> >>>> >>>> -Bill- >>>> >>>> >>>> >>>> On Tuesday, November 10, 2020 at 8:20:19 AM UTC-8 Richard Scales wrote: >>>> >>>> Thank you, that signal is present in all its glory. I got a circuit >>>> diagram and could see that it was rectifying AC from the transformer so >>>> that was the first place I looked. The signal was good. Given that the >>>> clock chip is multiplexing the displays nicely I'd be surprised if it had >>>> failed. >>>> >>>> I've also checked that all the various switch contacts are good and >>>> they do seem to be. >>>> >>>> I don't think that replacement clock ICs are going to be that easy to >>>> locate! >>>> >>>> Richard >>>> >>>> >>>> >>>> >>>> >>>> On Tue, 10 Nov 2020, 16:08 Bill Stanley, <[email protected]> wrote: >>>> >>>> A possible cause of the failure to count is the 60Hz signal the clock >>>> uses for a time base. Look at pin 23 of the MK5017 with a scope for a half >>>> wave 60 (or 50) Hz signal. >>>> >>>> >>>> >>>> -Bill- >>>> >>>> >>>> >>>> >>>> >>>> On Tuesday, November 10, 2020 at 7:10:26 AM UTC-8 Richard Scales wrote: >>>> >>>> Thank you. I have a Heathkit clock that needs some assistance. It does >>>> everything it should do apart from increment the time. The clock chip is >>>> driving the displays so I'm thinking it's OK but it just won't count time. >>>> >>>> I wasn't thinking of offering a kit but if anyone has a set of SP-101's >>>> then I can help out with Pcb's for this version as well as another one >>>> that >>>> I hope to have ready soon. >>>> >>>> Richard >>>> >>>> >>>> >>>> >>>> >>>> On Tue, 10 Nov 2020, 14:11 martin martin, <[email protected]> wrote: >>>> >>>> Your clock looks great! I'm currently fixing this 1970s Heathkit with >>>> an overheating power transformer. >>>> >>>> >>>> >>>> And yes! I would be interested in a kit >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> ~ >>>> >>>> *[email protected]* >>>> >>>> >>>> >>>> >>>> >>>> On Tue, Nov 10, 2020 at 6:04 AM Richard Scales <[email protected]> >>>> wrote: >>>> >>>> I could make plans available, or all hinges on having the displays. >>>> >>>> The rest of just smart sockets albeit ones I made work for these 7 >>>> segment displays. >>>> >>>> I have another design which is a direct drive approach and is therefore >>>> much simpler in terms of hardware whilst the software has to do a lot more >>>> of the heavy lifting. >>>> >>>> I'll show that when ready. I'm just waiting on updated pcb's to arrive. >>>> >>>> Richard >>>> >>>> >>>> >>>> On Tue, 10 Nov 2020, 13:58 Michail Wilson, <[email protected]> wrote: >>>> >>>> Love it. >>>> >>>> >>>> >>>> Plans, Open source, only one or making a kit available? >>>> >>>> >>>> >>>> Michail Wilson >>>> >>>> 206-920-6312 <(206)%20920-6312> >>>> >>>> >>>> >>>> *From:* [email protected] <[email protected]> *On >>>> Behalf Of *Richard Scales >>>> *Sent:* Tuesday, November 10, 2020 1:39 AM >>>> *To:* neonixie-l <[email protected]> >>>> *Subject:* [neonixie-l] SP-101 Clock, finshed at last! >>>> >>>> >>>> >>>> I've finally completed this: Six SP-101 panaplex displays being driven >>>> by 'smart sockets' which are getting their instructions from a Teensy >>>> Micro. >>>> >>>> >>>> >>>> A Wemos provides NTP sync, sensor reading (temperature and pressure) , >>>> Web scraping (local wind speed and direction) and random words. >>>> >>>> >>>> >>>> It does the best it can with only 7 segments. Also includes microwave >>>> motion detection so the thing is only displaying data when there is >>>> someone >>>> there to see it! >>>> >>>> >>>> >>>> I got green pcb's so the case is especially tinted to match. >>>> >>>> >>>> >>>> - Richard >>>> >>>> >>>> >>>> >>>> >>>> -- >>>> 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/4eb4cac2-d704-4464-8789-f13d1491b881o%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/neonixie-l/4eb4cac2-d704-4464-8789-f13d1491b881o%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>>> -- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "neonixie-l" group. >>>> To unsubscribe from this topic, visit >>>> 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