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CCD Array Reader Project
The CCD Array Reader project began with a free sample of the
Texas Instruments TC102-1 CCD Linear Image Sensor and
its rather terse data sheet. The TC102-1 provides virtually
no support circuitry, only the raw CCD (with a few special
pixels) and a simple output buffer. The board shown below was
designed to continously scan the TC102-1 and output a stream of
digital data in parallel format. A PC computer displays the
data graphically using a simple program.
Please Note: the TC102-1 is now an ancient component. This design
was completed in approximately two weeks in the Winter of 1992 as
a student project for a Physics course I took. Much better chips
than the TC102-1 are now available, but parts of this design
may still be interesting.
Many people who arrive at this page are interested in building
a camera-style project. If that's you, the good news is that
newer CMOS-based parts are now available that are much easier
to use than CCDs and usually contain a lot of the hard-to-build
support circuits (like this project) on the chip because of the
CMOS process. A cool chip, which I have personally seen in
operation, is the
LM9627
Color Image Sensor Chip, 648 x 488 Pixel,
30 fps. This is a modern part that will be a lot
easier to use than a really primitive part like the ancient TC102-1.
I have not worked with other (newer) CCD array devices since
this old project in 1992.
Features
- Fast Scan Rate
- Fully Automatic, requires no CPU overhead
- Automatic Offset Adjustment tracks ambient light level
- Automatic Gain Control maximizes dynamic range
- Saturation Detect indicates when the array is
exposed to too much total light.
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