Hi. The SCTV with the Teensy 4.0 uses an LTC2632 dual DAC. This uses SPI to load the X and Y values. It's about half the update rate of the built-in DACs in the previous Teensy 3.6, so I had to change the step size in the drawing routines. Unfortunately this chip is tiny, so it's hard to solder. I am in the process of redesigning the transformer and circuit board to be more friendly for kit and DIY use. I want to make the PC board with through hole parts, since people enjoy soldering those together. I will see if I can post the latest SCTV schematic diagram to my website today. I've been traveling a lot lately.
On Sat, Jun 10, 2023, 6:33 AM Max DN <flataeg...@gmail.com> wrote: > True, but the schematic is SCTV rev. C which is for Teensy 3.6. Does > anyone have the schematic for using Teensy 4.1? Just designed a clock based > on SCTV-rev and custom transformer but of course I have now realised that > Teensy 3.6 is impossible to get... > > Il giorno sabato 11 marzo 2023 alle 18:41:05 UTC SD ha scritto: > >> David Forbes has the schematic on his website, and the firmware on >> Github. I did not see that Jörg was making kits, in fact he said he didn't >> want to make kits, but perhaps make a PCB available, so I do not know why >> people are asking for kits. >> >> On Friday, March 10, 2023 at 3:42:49 PM UTC-5 liam bartosiewicz wrote: >> >>> The schematic and software would be good enough for me, personally >>> >>> On Mar 10, 2023, at 10:15 AM, Darrin Weiss <hip...@gmail.com> wrote: >>> >>> I also have some interest in a kit >>> >>> >>> >>> On Friday, March 10, 2023 at 10:00:11 AM UTC-5 Richard Arndt wrote: >>> >>>> Yep... put me down too for a Scope Clock kit of parts :-) Making the >>>> H/W & S/W open source would be cool too! >>>> >>>> I think selling PCB's & parts in kit form without enclosure, places FCC >>>> requirements on the user to not cause RF interference. >>>> >>>> Isn't that how SparkFun and Adafruit can sell assembled PCBs without >>>> FCC certification? >>>> >>>> On Thursday, March 9, 2023 at 9:19:56 AM UTC-5 Paul Andrews wrote: >>>> >>>>> Do you plan on publishing the software (on GitHub for example)? >>>>> >>>>> On Mar 8, 2023, at 5:36 PM, jörg <pos...@gmail.com> wrote: >>>>> >>>>> >>>>> >>>>> The tube is a RFT B7 S4-01 >>>>> >>>>> It‘s from an EO174A Oscilloscope. >>>>> >>>>> Nice green and pretty good to focus and linearity to the edges. >>>>> >>>>> The tube and first version of PCB could be viewed at >>>>> https://m.youtube.com/watch?v=zTyXJE2faXw >>>>> <https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fm.youtube.com%2Fwatch%3Fv%3DzTyXJE2faXw&data=05%7C01%7Cjoerg.postert%40otto.de%7C934c425d99ee4b01af7008db202467fd%7C8794e153c3bd44798bea61aeaf167d5a%7C0%7C0%7C638139112953496744%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=7yQJJjU6SCFcfQu%2BVxKoA8R9%2B%2FrsA1AVJOuO76nxNq8%3D&reserved=0> >>>>> >>>>> >>>>> I do not plan a kit or selling like david forbes do. >>>>> First of all, it is initially his design and software. Second, I do >>>>> not have the will and time to go through all the regulations EU/Germany >>>>> has >>>>> for selling such electronics. >>>>> >>>>> I could share the PCB if I order the next batch, but it is not >>>>> finished, yet. >>>>> >>>>> I plan to add ESP32 for NTP and web config. >>>>> >>>>> >>>>> >>>>> On Sunday, March 5, 2023 at 8:02:28 PM UTC+1 Nicholas Stock wrote: >>>>> >>>>>> Definitely not off-topic! I think everyone on this forum appreciates >>>>>> that post, well done. I really like the starfield effect. What tube were >>>>>> you using? Looks like it has very good linearity across the whole >>>>>> screen.... >>>>>> >>>>>> Cheers, >>>>>> >>>>>> Nick >>>>>> >>>>>> On Sat, Mar 4, 2023 at 11:55 PM Wo Tu <wtu...@gmail.com> wrote: >>>>>> >>>>>>> Hi ! >>>>>>> Really interesting and great work. Looks really good and its a „want >>>>>>> to have“. >>>>>>> Would be interested in pcb and code too , if possible a kit too. >>>>>>> Thank you. >>>>>>> >>>>>>> Michail Wilson schrieb am Samstag, 4. März 2023 um 15:11:01 UTC+1: >>>>>>> >>>>>>>> I am very interested as well. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Would love to have the code and pcb design and even a kit. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> I read through the posts, but didn’t see anything other than the >>>>>>>> video. Thumbs up on it too. 😊 >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Michail Wilson >>>>>>>> >>>>>>>> 206-920-6312 <(206)%20920-6312> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> *From:* neoni...@googlegroups.com <neoni...@googlegroups.com> *On >>>>>>>> Behalf Of *jörg >>>>>>>> *Sent:* Saturday, March 4, 2023 7:14 AM >>>>>>>> *To:* neonixie-l <neoni...@googlegroups.com> >>>>>>>> *Subject:* Re: [neonixie-l] ScopeClock with teensy4.0 >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> @Jon, >>>>>>>> >>>>>>>> >>>>>>>> yes, I will share the code. I have moved it to the VS Code IDE with >>>>>>>> PlatformIO. I do not like the Arduino IDE much. It should run on >>>>>>>> david's >>>>>>>> hardware, too. >>>>>>>> Do yo you have build the hardware already? >>>>>>>> >>>>>>>> On Friday, March 3, 2023 at 5:12:46 AM UTC+1 David Forbes wrote: >>>>>>>> >>>>>>>> I was able to change to a Teensy 4.1 with a 2 channel 12 bit SPI >>>>>>>> DAC in my latest version. I had to reduce the DAC rate by half. It >>>>>>>> looks >>>>>>>> just as good as the old version. Of course, the DAC I chise is already >>>>>>>> unobtanium. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Thu, Mar 2, 2023, 7:17 AM jörg <pos...@gmail.com> wrote: >>>>>>>> >>>>>>>> Hi, maybe a bit offtopic. >>>>>>>> >>>>>>>> I've put some effort in using the teensy4.x to run the scope clock >>>>>>>> based on david forbes one. >>>>>>>> The teensy3.6 based one is running on my own hardware for a while. >>>>>>>> >>>>>>>> But because of CPU shortage and the use of the teensy3.6 internal >>>>>>>> DAC's, I was curious to get the stuff up and running on the faster >>>>>>>> teensy >>>>>>>> 4.x CPU. >>>>>>>> In this approach I'm using a parallel driven 12 bit 4 channels DAC. >>>>>>>> The usage of a serial DAC was too slow and I did not get DMA up and >>>>>>>> running >>>>>>>> on teensy4.x. >>>>>>>> Anyway, this works and I like it. >>>>>>>> >>>>>>>> Video: https://youtu.be/HYwgyYnQUxw >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> 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+...@googlegroups.com. >>>>>>>> To view this discussion on the web, visit >>>>>>>> https://groups.google.com/d/msgid/neonixie-l/a2701743-2b9b-4543-a0c0-32b8b90da85an%40googlegroups.com >>>>>>>> <https://groups.google.com/d/msgid/neonixie-l/a2701743-2b9b-4543-a0c0-32b8b90da85an%40googlegroups.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 neonixie-l+...@googlegroups.com. >>>>>>>> >>>>>>>> To view this discussion on the web, visit >>>>>>>> https://groups.google.com/d/msgid/neonixie-l/bc1f2bea-aa6f-4890-bcc9-4b3104b444c7n%40googlegroups.com >>>>>>>> <https://groups.google.com/d/msgid/neonixie-l/bc1f2bea-aa6f-4890-bcc9-4b3104b444c7n%40googlegroups.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 neonixie-l+...@googlegroups.com. >>>>>>> >>>>>> To view this discussion on the web, visit >>>>>>> https://groups.google.com/d/msgid/neonixie-l/48106ee0-dc58-429b-a701-45863aca770fn%40googlegroups.com >>>>>>> <https://groups.google.com/d/msgid/neonixie-l/48106ee0-dc58-429b-a701-45863aca770fn%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/rjislNgmNS0/unsubscribe. >>>>> To unsubscribe from this group and all its topics, send an email to >>>>> neonixie-l+...@googlegroups.com. >>>>> To view this discussion on the web, visit >>>>> https://groups.google.com/d/msgid/neonixie-l/88b9ebf0-e485-4097-9e69-1730d2b20f3en%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/neonixie-l/88b9ebf0-e485-4097-9e69-1730d2b20f3en%40googlegroups.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 neonixie-l+...@googlegroups.com. >>> >>> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/273e478c-9233-4f16-9f57-59d27b05be05n%40googlegroups.com >>> <https://groups.google.com/d/msgid/neonixie-l/273e478c-9233-4f16-9f57-59d27b05be05n%40googlegroups.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 neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/2a132d1e-a9de-47a0-bbfd-4d2bb62f4c75n%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/2a132d1e-a9de-47a0-bbfd-4d2bb62f4c75n%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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