>
> > Has anyone seen an inexpensive design for a frame grabber? I need to design
> > one for BW video camera use (RS170 base band video).
>
> I doubt you are going to make it with a PIC. Much easier if you have a
> cheap DSP, such as some members of the 21xx family.

Although, if you look way back in some issues of Byte Magazine...
Ciarcia did a thing he called ImageWise which was a frame-grabber
based on an 8031 running at 11+ MHz.  It was able to grab the frame
in one frame time and then crank it out a serial port at 57.6Kbaud.

I would think that PICs (which run leaner and meaner than 8031's)
would be able to do this task.

There are also some products which hook to a PC parallel port and
can grab a "frame" after several passes of full rate video have
gone by.  This is a bummer if your image is not relatively static
but OK for something like a security camera or some such. Unfortunately,
I can't think of any published designs for one of these "cheapo"
circuits.  Anyone else ?

Chris

--
Chris Elmquist, N0JCF
chrise@n0jcf.com
n0jcf@amsat.org