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Re: Low spec 'scope.

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On a sunny day (Thu, 29 Aug 2024 10:43:29 +0100) it happened
liz@poppyrecords.invalid.invalid (Liz Tuddenham) wrote in
<1qz1rr1.1p7aq3z13xmh1aN%liz@poppyrecords.invalid.invalid>:

>If the Raspberry Pi could be made to fire itself up without any

AFAIK Raspi has no ADC input.
You will have to connect an ADC to the GPIO.


>intervention and accept two analogue inputs, that would work.  (...but
>someone would have to program it for me, or at least lead me through how
>to program it.)  The 100Kc/s requirement isn't just fanciful
>over-specification; this thing works on the signals that are well
>outside the audio band and the 'scope needs to display them clearly,
>despite all the audio clutter.  The H.F. signals are higher amplitude
>than the audio but are in the nature of pulses and occur infrequently.
>(The analogue scope has to be Z modulated from rate-of-change to
>emphasise the pulses and avoid screen burn, but this wouldn't be a
>problem with an LCD display.)

1 channel kit: < 7 US dollars:
 https://www.ebay.com/itm/295219906968
 I cannot even buy the parts here for that price.
  LCD 320x240 enough?

Fast CD4053 or something CMOS switch makes 2 channels?
Trigger channel select from a CD4073 flopflop after each scan?
the possibilitiies are endless

Knowing programming is almost a requirement these days (since the seventies) in electronics.

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Thread

Low spec 'scope. liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-28 08:39 +0100
  Re: Low spec 'scope. Pimpom <Pimpom@invalid.invalid> - 2024-08-28 14:27 +0530
    Re: Low spec 'scope. liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-28 10:26 +0100
  Re: Low spec 'scope. Jan Panteltje <alien@comet.invalid> - 2024-08-28 10:29 +0000
    Re: Low spec 'scope. liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-28 13:41 +0100
      Re: Low spec 'scope. Jan Panteltje <alien@comet.invalid> - 2024-08-28 15:12 +0000
  Re: Low spec 'scope. Martin Brown <'''newspam'''@nonad.co.uk> - 2024-08-28 15:47 +0100
    Re: Low spec 'scope. Don Y <blockedofcourse@foo.invalid> - 2024-08-28 08:32 -0700
      Re: Low spec 'scope. Martin Brown <'''newspam'''@nonad.co.uk> - 2024-08-28 17:05 +0100
        Re: Low spec 'scope. Don Y <blockedofcourse@foo.invalid> - 2024-08-28 13:05 -0700
      Re: Low spec 'scope. Jasen Betts <usenet@revmaps.no-ip.org> - 2024-08-29 08:57 +0000
        Re: Low spec 'scope. liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-29 10:43 +0100
          Re: Low spec 'scope. Jan Panteltje <alien@comet.invalid> - 2024-08-29 10:36 +0000
            Re: Low spec 'scope. liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-29 12:58 +0100
              Re: Low spec 'scope. Jan Panteltje <alien@comet.invalid> - 2024-08-29 12:30 +0000
                Re: Low spec 'scope. liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-29 15:39 +0100
                Re: Low spec 'scope. Jan Panteltje <alien@comet.invalid> - 2024-08-29 15:59 +0000
          Re: Low spec 'scope. Martin Brown <'''newspam'''@nonad.co.uk> - 2024-08-29 12:31 +0100
            Re: Low spec 'scope. liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-29 13:10 +0100
        Re: Low spec 'scope. Don Y <blockedofcourse@foo.invalid> - 2024-08-29 11:23 -0700
          Re: Low spec 'scope. Jasen Betts <usenet@revmaps.no-ip.org> - 2024-08-30 06:36 +0000
            Re: Low spec 'scope. Jan Panteltje <alien@comet.invalid> - 2024-08-30 07:14 +0000
            Re: Low spec 'scope. Don Y <blockedofcourse@foo.invalid> - 2024-08-30 00:32 -0700

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