Amazing work! I've been working on porting a fork of David Forbes' code to an STM32G474. Got a starfield and 3D cube showing, but got somewhat stuck. Now looking at designing a power supply. Are you planning on sharing the software?
tirsdag den 27. februar 2024 kl. 22.13.25 UTC+1 skrev paulvr: > I'm not sure what you mean by integrators. The DAC outputs are configured > as unbuffered, to use the full range 0 tot 3,3 Volt (internal STM buffers > are not rail to rail). So, the DAC output is connected to an opamp buffer > and from there to a amplifing and summing opamp, and further to a > transistor high voltage class A amplifier. Very straight forward. > > Op dinsdag 27 februari 2024 om 08:51:14 UTC+1 schreef Toby Thain: > >> On 2024-02-26 4:12 a.m., paulvr wrote: >> > This is my first post in this forum and I would like to introduce you >> to >> > my version of the scope clock. Mainly inspired by the work of David >> > Forbes and Grahame Marsh. >> > The work is not finished yet, but I have reached a milestone for myself >> > in that all components are on one PCB and only one voltage source is >> > required, nm. 12 volts DC. >> > The high voltage is made using a standard Würth WE-flex transformer, >> > plus and minus 250 Volt. The filament voltage is provided by a buck and >> > forward converter and a standard Würth push-pull transformer (6.3 Volt >> > to 600mA). >> > The MCU is an STM32G491, mainly chosen because of the integrated 12-bit >> > DACs. The image composition is completely DMA controlled and works >> > independently of the CPU, which therefore has a lot of time for other >> tasks. >> > The characters and graphic shapes are encoded as SVG path. >> >> Looks great. >> >> Does the signal generation use integrators or is it direct 2 channel DAC >> output to amplifiers and plates? >> >> --Toby >> >> >> > An ESP32 has been added to achieve the correct time according to the >> > NTP. Operation is entirely via a web server running on the ESP32. The >> > software is not finished, and not all functions work (work in >> progress). >> > The next step is to try out other CRT tubes and make a housing. >> > >> > Regards, >> > Paulscope_clock_DG7_32_v0_5.jpg >> > >> > -- >> > 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 >> > <mailto:neonixie-l+...@googlegroups.com>. >> > To view this discussion on the web, visit >> > >> https://groups.google.com/d/msgid/neonixie-l/4e60fa43-a9b5-40b5-8381-5a968b45d480n%40googlegroups.com >> >> < >> https://groups.google.com/d/msgid/neonixie-l/4e60fa43-a9b5-40b5-8381-5a968b45d480n%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/78ec675f-5464-4454-9cd0-33a94d48abc4n%40googlegroups.com.
