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Groups > comp.arch.fpga > #38698
| From | Jan Panteltje <alien@comet.invalid> |
|---|---|
| Newsgroups | sci.electronics.design, comp.arch.fpga |
| Subject | Re: 50 cent DDS synthesizer |
| Date | 2025-10-28 17:41 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <10dqv84$28ita$1@dont-email.me> (permalink) |
| References | (7 earlier) <10djh8v$2h1af$1@paganini.bofh.team> <10dkl12$3sl8j$1@dont-email.me> <10dmda4$30aua$1@paganini.bofh.team> <10dnfct$mvrj$1@dont-email.me> <10dqr4b$3dd0c$1@paganini.bofh.team> |
Cross-posted to 2 groups.
>antispam@fricas.org (Waldek Hebisch)wrote: >>In sci.electronics.design Jan Panteltje <alien@comet.invalid> wrote: >>>antispam@fricas.org (Waldek Hebisch)wrote: >>>>In sci.electronics.design Jan Panteltje <alien@comet.invalid> wrote: >>>>>antispam@fricas.org (Waldek Hebisch)wrote: >>>>>>In sci.electronics.design Jan Panteltje <alien@comet.invalid> wrote: >>>> Old spice version could still be running in wine in Linux on old PC upstairs. >>>> For some reason I do not need Spice except in food. >>> >>>Concerning Raspberry Pi, currently Chinese mini-PC is cheaper >>>than Raspberry Pi powerful enough to serve as a main computer. >> >> Important thing for me is the I/O, Raspberry GPIO is sort of standardized >> I have now 5 Raspberry Pies, 3 on 24/7 on a UPS. >> >> One upstairs in the window that drives a big dot matrix display that can be seen from far away saying 'Free Palestine support >> at 2 state solution' >> It scrolls over 3 lines and flashes:-) > >If display has sane control, then simple 8 pin micro should be >enough. Blue Pill certainly could do this. Well it is an surplus display that I bought for about 12 Euro (13 dollars or so) in 2013, so years ago. https://panteltje.nl/pub/matrix_display_component_side_IMG_4119.JPG I removed the unknown processor and wired it to the Raspberry GPIO https://panteltje.nl/pub/FDS132_matrix_display_Raspberry_Pi_interface_board_IMG_4129.JPG https://panteltje.nl/pub/FDS132_LED_matrix_display_Raspberry_Pi_connections_circuit_diagram_IMG_4137.JPG Basically all shift registers.. Did have a circuit diagram of the thing. Yes, a PIC could do it, but not this: https://panteltje.nl/pub/rtl_sdr_dump1090_via_FDS132_matrix_display_Raspberry_Pi_driver_IMG_4149.JPG that is air traffic overhead, the pi running dump1090 from a RTL_SDR USB stick, shows flight Ryanair 1747Y altitude 1175 meter, speed 733 km/h and its location in degrees. And as the Pi has Ethernet you can send anything to it. The Pi in the display upstairs just runs standalone with its own script. Older configuration send from an other Pi via Ethernet: https://panteltje.nl/pub/CD_box_IXIMG_0547.JPG >> Old picture: >> https://panteltje.nl/pub/rtl_sdr_dump1090_via_FDS132_matrix_display_Raspberry_Pi_driver_IMG_4149.JPG >> >> Raspberry number 5 is an old one and is backup. >> I post this from a Pi4 8 GB with the Usenet newsreader I wrote. >> Use it for all internet related things. >> Fast as lightning, had to add a 4 second delay to be able to switch virtual desktop (nine virtual desktops in use) >> fast enough before Chromium started by mouse click. >> >> All sort of 'Hats' on some Raspies, compass, air pressure, IR camera interface, >> One raspberry Pi4 4 GB records 6 security cameras, radiation, air traffic, plays background music, records audio, >> A 8 TB Toshiba USB harddisc is connected to each PI4. >> And there are 2 USB RTL_SDR sticks connected, one now records wireless data from the outside weather station, temperature, >> humidity, also recorded 24/7, >> the other one uses dump1090 for air traffic, or my spectrum analyzer. >> https://panteltje.nl/pub/xpsa-0.7.gif >> https://panteltje.nl/pub/boats_and_planes.gif >> https://panteltje.nl/pub/xgpspc_5_planes.gif >> >> And then there is the Ethernet interface, 3 gas sensors I designed are running 24/7 and are recorded, use POE, >> LED lights in the room, can even function as disco lights controlled by playing music, >> And the USB interface, SDcard reader, and for internet a Huawei 4G USB modem. >> >> For 'on the road' I have a Samsung laptop running Ubuntu that I can put that Huawei 4G stick in and then am online in most of >> Europe. >> >> A Raspberry Pi 4 plus SDcard is below 100 Euro (even below 100 USD :-) >> https://www.kiwi-electronics.com/nl/raspberry-pi-boards-behuizingen-uitbreidingen-en-accessoires-59 > >Mini PC with 6 GB RAM, 64 GB e-MMC is about $60. > >> OTOH I have 3 Ethernet switches in use, 2 USB hubs, and a HDMI switch to switch between some Raspberry outputs on my monitor, >> all with wallwarts to power those, >> plus a POE module.. >> >> One cheap PC does not do all those above things, the cost is not so much in the computers.. but what hangs from it here. >> Some stuff I wrote: >> https://panteltje.nl/panteltje/newsflex/download.html >> >> Last time I checked the uptime of my Pi4 4GB (the one that records most stuff), it was almost 600 days. >> Never a glitch, unless I pull the power plus, even then plenty time on UPS to switch mains to my 250 Ah lifepo4 battery pack >> and the 2 kW pure sine wave 12 V to 230 V inverter. >> https://panteltje.nl/pub/250_Ah_12V_to_230V_sinewave_IXXIMG_0796.JPG >> >>>I recently bought a few cheap Orange Pi-s and Milkv Duo-s. >>>But they are low end machines. Would be reasonably powerful >>>as desktop/server in 2000 (or maybe in 1999, clock freqency was >>>increasing fast in those years), but not now. I am using >>>Orange Pi-s to check that my software compiles fine on ARM. >>>I have Milkv Mars, which is slightly more powerful than Milkv Duo S, >>>I use it to test that my software compiles fine on Risc-V. >>>But otherwise those boards are useful as a way to control electronics >>>via Ethernet >> >> Never used the orange-pi, I see: >> https://www.newegg.com/p/3C6-06T4-000V0 >> >> Expensive? > >Yes. That is very expensive variant. Also Newegg may be >expensive. > >I bougt > >aliexpress.com/item/1005005785695181.html > >which is (including shipping) slightly more than $16. > >Milkv-Duo S in $9 + shipping. That is nice! >> For HD video I have 3 HD satellite box receivers, 2 are connected to my Samsung TV. >> Those show HD video and play and record HD from USB sticks and were about 35 Euro (40 USD?) each. > >Some people claim that satellite box receivers can serve as cheap >computers, but I did not try. Yes the boxes run Linux AFAIK, but mine run FAT32 filesystem... Long videos are split. Once in a while, when the USB sticks (128 GB) are full, I copy everything new I want to keep to the big 4 TB Toshiba USB disk that is connected to the Samsung TV for read only. Lots of nice old movies, lots of good music, all accessible via the TV remote then. The TV has its own build in sat receiver but my movable dish takes a lot of power when moving, so I am using the cheap TV boxes, already had to replace a chip in one some years ago.. Better that than getting that huge TV repaired, it is still under guarantee, but for overload?? >-- > Waldek Hebisch >
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50 cent DDS synthesizer john larkin <jl@glen--canyon.com> - 2025-10-22 14:49 -0700
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-23 07:45 +0000
Re: 50 cent DDS synthesizer john larkin <jl@glen--canyon.com> - 2025-10-23 07:36 -0700
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-23 15:16 +0000
Re: 50 cent DDS synthesizer "Don" <g@crcomp.net> - 2025-10-23 16:54 +0000
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-23 17:20 +0000
Re: 50 cent DDS synthesizer Martin Brown <'''newspam'''@nonad.co.uk> - 2025-10-23 19:33 +0100
Re: 50 cent DDS synthesizer Chris Jones <lugnut808@spam.yahoo.com> - 2025-10-24 10:12 +1100
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-24 06:56 +0000
Re: 50 cent DDS synthesizer Martin Brown <'''newspam'''@nonad.co.uk> - 2025-10-24 09:53 +0100
Re: 50 cent DDS synthesizer Lasse Langwadt <llc@fonz.dk> - 2025-10-24 13:40 +0200
Re: 50 cent DDS synthesizer john larkin <jl@glen--canyon.com> - 2025-10-24 07:09 -0700
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-24 17:17 +0000
Re: 50 cent DDS synthesizer antispam@fricas.org (Waldek Hebisch) - 2025-10-25 22:00 +0000
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-26 08:10 +0000
Re: 50 cent DDS synthesizer john larkin <jl@glen--canyon.com> - 2025-10-26 07:56 -0700
Re: 50 cent DDS synthesizer Bill Sloman <bill.sloman@ieee.org> - 2025-10-27 03:19 +1100
Re: 50 cent DDS synthesizer john larkin <jl@glen--canyon.com> - 2025-10-26 10:08 -0700
Re: 50 cent DDS synthesizer Bill Sloman <bill.sloman@ieee.org> - 2025-10-27 16:02 +1100
Re: 50 cent DDS synthesizer antispam@fricas.org (Waldek Hebisch) - 2025-10-27 00:10 +0000
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-27 09:52 +0000
Re: 50 cent DDS synthesizer antispam@fricas.org (Waldek Hebisch) - 2025-10-28 16:31 +0000
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-28 17:41 +0000
Re: 50 cent DDS synthesizer john larkin <jl@glen--canyon.com> - 2025-10-27 07:58 -0700
Re: 50 cent DDS synthesizer john larkin <jl@glen--canyon.com> - 2025-10-23 11:46 -0700
Re: 50 cent DDS synthesizer john larkin <jl@glen--canyon.com> - 2025-10-23 18:55 -0700
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-24 06:57 +0000
Re: 50 cent DDS synthesizer Jan Panteltje <alien@comet.invalid> - 2025-10-24 07:38 +0000
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