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 >>>>>>> >>>>>>> >>>>>>> >>>>>>> *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 >>>>>>> https://groups.google.com/d/topic/neonixie-l/l9hzbmAmbnY/unsubscribe >>>>>>> . >>>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>>> [email protected]. >>>>>>> To view this discussion on the web, visit >>>>>>> https://groups.google.com/d/msgid/neonixie-l/MW2PR0102MB3435BA7FADF3ECBE89602C1482E90%40MW2PR0102MB3435.prod.exchangelabs.com >>>>>>> >>>>>>> <https://groups.google.com/d/msgid/neonixie-l/MW2PR0102MB3435BA7FADF3ECBE89602C1482E90%40MW2PR0102MB3435.prod.exchangelabs.com?utm_medium=email&utm_source=footer> >>>>>>> . >>>>>>> >>>>>> -- >>>>>> 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/CA%2B9r3s_XAK3Ae94SfkOM_5woKdpGyoKkuX%2B0px5BUs4eYvH8fw%40mail.gmail.com >>>>>> >>>>>> <https://groups.google.com/d/msgid/neonixie-l/CA%2B9r3s_XAK3Ae94SfkOM_5woKdpGyoKkuX%2B0px5BUs4eYvH8fw%40mail.gmail.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 >>>>> https://groups.google.com/d/topic/neonixie-l/l9hzbmAmbnY/unsubscribe. >>>>> To unsubscribe from this group and all its topics, send an email to >>>>> [email protected]. >>>>> >>>> To view this discussion on the web, visit >>>>> https://groups.google.com/d/msgid/neonixie-l/CAKYv7NSU6dMJzM6zbQkUo6EVpnxfuPTQ1kdZo%3D3oWjEmsTmYkg%40mail.gmail.com >>>>> >>>>> <https://groups.google.com/d/msgid/neonixie-l/CAKYv7NSU6dMJzM6zbQkUo6EVpnxfuPTQ1kdZo%3D3oWjEmsTmYkg%40mail.gmail.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 >>> https://groups.google.com/d/topic/neonixie-l/l9hzbmAmbnY/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> >> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/0c5a7be4-5cdd-486a-b2c8-f98459e22eben%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/0c5a7be4-5cdd-486a-b2c8-f98459e22eben%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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