Looking for Pi ADC and there seems very little choice

Would this one do the job?

USB soundcard?

The 12bit version is about 4x faster

Yes, thank you, that seems to be what I want. A *bit* on the pricy side but not too bad I suppose.

Yes, but how easily will two of those mount on a Pi?

Not. They?re for on a breadboard or otherwise external project build, with wires to the Pi gpio pins.

OK, not a *big* problem but it does make it all rather messier. I'm surprised that there aren't any (or many, at least) Pi Hats with A-D on them.

When I looked at this problem I concluded that actually a totally different PIC would be what was needed to turn 48 analogue inputs into USB data....

If you want A2D dont use a Pi, basicallly

There are plenty, but not always easy to find. I used this as the search term "pi hat with analogue to digital converter".

If you want 8 differential 24 bit channels, then you may have a problem.

Stephen

Look at Sequent Microsystems Mega-IO, which is stackable four deep. There are UK suppliers.

Stephen

I don't, I currently use a Beaglebone Black. However I was wondering if the Pi was a viable alternative as the BBB gets older. It would appear not.

I don't need differential and I don't need 24-bit. Your search term above produces some useful hits but mostly in US/Canada, I'll need to ask if they will send over here (UK).

On Sat, 14 Jul 2018 12:49:51 +0100, The Natural Philosopher declaimed the following:

Maybe a Beaglebone Black? 7 ADC in, PWM outs. Granted, a slower processor (1GHz for current model) and a less RAM, but built-in eMMC along with uSD card slot, and "real" Ethernet. Lot's more exposed I/O pins.

Or down to no-OS microcontrollers (well, TI-RTOS is available) TIVA TM4C123: 12-channels (shared) 12-bit ADC

{Side comment: the TM4C123 has an obscene arrangement of timers -- 6 64-bit which can be split into 12 32-bit timers, and 6 32-bit which can be split into 12 16-bit}

Is the AMBA address / data bus available on the Pis?

With a one off price of US$35, the one-off UK prices make sense. Having imported US boards in the past, I can assure you that the UK price is not unreasonable for a low volume part.

Stephen

That should vanish once we exit the EU

I tried importing somne gears once. They ended up 2.5 times the price with shipping importt duty, handling charge to collect import duty, VAT on handling charge to collect import duty...