Thanks for your prompt reply David. I have already printed my board for a Teensy 3.6. I have no issues soldering tiny smd components assuming that I can get an LTC22632! I may design a small PCB to super-impose the Teensy 4.1 over the existing footprint and layout. In doing so, I could add the dual DAC on this new adapter board. I can see CS is connected to pin10 but where are CLK and SDI of the LTC2632 connected? I don’t see them in the code. Yes, It would be great if you could post diagram for SCTV-E for Teensy 4.1 please.
Interesting that you are redesigning the transformer. I managed to hand-wire mine and seems to work well. The 6.3V for the heater is the one that I’m not too sure how to calibrate exactly, since the SMPS… It shines a bit too bright at the moment and voltage drops to 2V, so that’s not healthy for the heater filament. I can remove a few turns but not sure what is the ‘exact’ RMS V I’m looking for given the spikes of the SMPS at 100Khz, I’ll continue to experiment on that using a 6.2V 500mA lightbulb to avoid damaging the CRT. Thanks again for updating the schematic when you get a chance, it’ll save me so much time to experiment. > On 10 Jun 2023, at 16:41, David Forbes <nixiebu...@gmail.com> wrote: > > 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 > <mailto: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 <tel:(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 <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 >>> <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 > <mailto: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. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com > <mailto:neonixie-l+unsubscr...@googlegroups.com>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/CAPbqtveDqghW5iOyBAeuj1gZJ2RfXyYhX0%3DMpCH9%3DgG4b2Q4Ng%40mail.gmail.com > > <https://groups.google.com/d/msgid/neonixie-l/CAPbqtveDqghW5iOyBAeuj1gZJ2RfXyYhX0%3DMpCH9%3DgG4b2Q4Ng%40mail.gmail.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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