Hey, Adrian, let me knew if you find that Teensy 3.6.I'm not having much luck with a teensy 4.1 + external DAC using SPI. Nor I can see any issues at all in the code. The connections are simple enough but it cannot draw a circle (as a test) on my CRT using the open source code that Cathode Corner published. Indeed, when I test the DAC output on the oscilloscope looks irregular, whereas the SPI lines seems to behave as expected. Odd. If I input two sine waves into the deflection amplifiers using my signal generator, then I can get a circle on the CRT, that proves that power supply, level shifters and deflection amplifiers should be fine. -------- Original message --------From: Adrian Godwin <artgod...@gmail.com> Date: 10/06/2023 17:17 (GMT+00:00) To: neonixie-l@googlegroups.com Subject: Re: [neonixie-l] ScopeClock with teensy4.0 I think I have an unused teensy 3.6. It may take some time to track it down but I'd happily swap it for a 4.1 if that simplifies things for you.On Sat, Jun 10, 2023 at 5:03 PM David Forbes <nixiebu...@gmail.com> wrote:Here is the schematic of the SCTV rev E, which uses the Teensy 4.1. On Sat, Jun 10, 2023 at 8:51 AM Max Di Noi <flataeg...@gmail.com> wrote: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> 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 S4-01It‘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=zTyXJE2faXwI 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,NickOn 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 Wilson206-920-6312 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. -- 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. -- 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. -- 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. -- 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. -- 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. -- 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/CAPbqtveDqghW5iOyBAeuj1gZJ2RfXyYhX0%3DMpCH9%3DgG4b2Q4Ng%40mail.gmail.com. -- 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/67621F9A-A7FD-4414-9E92-51574D45C3A9%40gmail.com. -- 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/CAPbqtvcD%3DtpJi7hJjcMi1kF7zna48z4M050QXTBetWMOXB6DYA%40mail.gmail.com. -- 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/CALiMYrue1rB11emdS91aZ2Rdjyv%2BHW_v-v1sgsuoFhGxqZQEjg%40mail.gmail.com. -- 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/64aa8f07.df0a0220.5d0bb.c731%40mx.google.com.
