data collection and storage.....

[Jorgen Karlsson]

> > Unfortunally the adc channels are not available through the
> > simmstick bus, they are accessed through one of the connectors on
> > the board. This makes me doubt the use of a motherboard in this
> > particular case.
>
> You can still use the MB for controls, digital data and power
> distribution to your signal-conditioning on a prototyping board
> (e.g. DT202) with headers to match. It makes the process more
> 'modular', something to encourage experimentation. One can start
> with just one or two 'channels' and expand as necessary.
> Inter-connects should probably be shielded of course...

I think so too, but in this case all inputs exept the rpm signal are analog
and cannot be accessed through the simm bus. I don't want the signal
conditioning of the rpm pulse anywhere near the main processor board.

But if more inputs are needed, going the other way and adding a passive
backplane can be a good idea, I think that it is the best option when
working with the SIMM100. I think that for example opto isolator boards are
available.


> Do you have any more info regarding the I2C EEPROMs...  I can only
> seem to find relatively-small devices (up to around 2048x8bit).
> [microchip.com looks promising with 258kx8bit listed, but their site
> is broken at the moment.]

Unfortunally not, Microchip has some big ones. I just found an example for
I2C and posted it. Bascom has similar functions for communicating with SPI
and other types too.

With a 256kbit eeprom 25s/s can be taken for 20 minuits, should be enough.

Jorgen

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