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| From | antispam@fricas.org (Waldek Hebisch) |
|---|---|
| Newsgroups | sci.electronics.design, comp.arch.fpga |
| Subject | Re: 50 cent DDS synthesizer |
| Date | 2025-10-28 16:31 +0000 |
| Organization | To protect and to server |
| Message-ID | <10dqr4b$3dd0c$1@paganini.bofh.team> (permalink) |
| References | (6 earlier) <10df7vg$2dvoi$1@dont-email.me> <10djh8v$2h1af$1@paganini.bofh.team> <10dkl12$3sl8j$1@dont-email.me> <10dmda4$30aua$1@paganini.bofh.team> <10dnfct$mvrj$1@dont-email.me> |
Cross-posted to 2 groups.
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.
> 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.
> 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.
--
Waldek Hebisch
Back to comp.arch.fpga | Previous | Next — Previous in thread | Next in thread | Find similar
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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