Hi, Mike

    I already have some LPC2104 samples here with me :-) With a good analog
front end, a 2 channel AD converter and a USB interface chip we could have a
very nice instrument for about 60 bucks in boards and parts... If we go to
the tenths of mhz I think that it is better to use one of the designs that
already exist on the Net....

    Ir we decide for speeds up to 1msps, we can use a LPC or a scenix part,
analog front end with 2 or 3 different input "scales", the AD converter
could be something like a AD7924 (12 bits,1msps $8.81), AD7928 (12 bits,
1msps $9.31) or many others from AD or Maxim and we could use a FTDI part to
communicate with the PC. At those sample rates we could probably stay with
no onboard memory. That leaves us with a design with less that 10 chips and
a bunch of passives that can be done in a simple double sided board, simple
to design and cheap to execute....

best regards,
Alexandre Guimaraes


----- Original Message -----
From: "Mike Singer" <m_singer@poluostrov.net>
To: "'Microcontroller discussion list - Public.'" <piclist@mit.edu>
Sent: Saturday, September 18, 2004 9:19 AM
Subject: RE: [EE] scope project anyone?


> Alexandre Guimaraes wrote:
> >
> >    My basic requirements would be:
> >
> > - between 200khz and 1mhz max sampling rate.
> > - Small
> > - Cheap
> > - Built on double sided boards
> > - Easy to find components
> > - 2 channels scope with 8 or 12 bits of resolution
> > - 16 channels logic analyser
> > - 2 level depth trigger logic
> > - using a PC ou a Palm to show the results
> > - At least 32K memory buffers.
>
>
> Alexandre,
>
> I'd consider some Kickstart Kit/Eval Board/Dev Tools etc.
> for Philips LPC2XXX.
> This family of 60 MHz ARM7-core Flash microcontrollers
> seems to get close to your requirements and is pretty cheap.
>
> Side effect would be an experience in a field PICs won't
> reach in a decade.
> CPLDs, FPGAs, DSOs are good, but, I think, 32 bit Philip's
> microcontrollers are much easier to start with for a good
> PICster :-)
>
>
> Best Regards.
>
> Mike.
>
>
>
>
>
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