Searching SBC/DSP board/microcontroller; 4ADC/1kHz/USB Host

>>>You can take a look at the detailed
>>>datasheet and the ADC section for details, if 10 bit is sufficient.

Ah, I think I missed the "detailed" part... yea, that datasheet is loads
more helpful!  I got the SPS rate and the settling time when switching
channels :)

>Do you have previous experience with microcontroller projects?

I have absolutely no prior experience with microcontroller projects :(

>I don't know much about analog circuits, but if you think it is the
power
>supply, you can test it with a battery. I think you should see something
on
>a scope, if you try to measure some muscle contraction, otherwise you
are
>out of luck with a simple single ended ADC of a microcontroller.

Yea, testing with a battery is probably a good idea.  My signal is...
pretty good at the moment, there is just a small sinusoidal signal
superimposed on the muscle signal... I'll have to consult my professor when
she gets back if she has any recommendations... not sure if I could try
adding another small range filter to eliminate the 60Hz before recording or
something... shall see.

>A good specification is important, but sometime you have to do some
>research on your own to fill missing details in the specification.

Good point.  I'll try doing some more reading up on what others have
already done.

>This one has 64 MBit and costs $3 for larger quantities. That's strange,
>because you'll get 2 GBytes USB memory sticks in single quantities for
much
>less than $10, even for a single unit. I wonder what flash chips they
use.
>Comparing the prices, the 64 MBit chip is about a factor of 100 to
>expensive. Maybe it's cheaper to buy an USB memory stick, break it and
>desolder the flash :-)

I'd probably prefer to just pay a few extra bucks rather than mess around
taking apart a memory stick ^_^;;

Thanks for all the help :)  Sounds like I've got some more things to
research..

Tyler

Yoreki wrote:

> I have absolutely no prior experience with microcontroller projects :(

Then this would be a hard project for your first microcontroller project.
But the good news is that you'll learn a lot, if you manage to finish it.

> Yea, testing with a battery is probably a good idea.  My signal is...
> pretty good at the moment, there is just a small sinusoidal signal
> superimposed on the muscle signal... I'll have to consult my professor when
> she gets back if she has any recommendations... not sure if I could try
> adding another small range filter to eliminate the 60Hz before recording or
> something... shall see.

You could try a notch filter.

-- 
Frank Buss, fb@frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de