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The
Parallax TSL1401 Linescan Imaging Daughterboard
provides
one-dimensional sight to almost any microcontroller.
It is designed for
plug-in compatibility with Parallax's BS2pe Motherboard but can be used
with all other popular microcontrollers
The TSL1401-DB includes the TAOS TSL1401R 128-pixel sensor
chip, a
7.9mm focal length imaging lens, and control electronics to aid in
capturing images for evaluation. It produces a clocked analog data
output, whose voltage levels correspond to the light intensity at each
pixel. By means of an analog-to-digital converter (or even a simple
digital logic threshold), image data are easily transferred to a
microcontroller to detect objects, edges, gaps, holes, liquid levels,
textures, emissive sources, simple barcodes, and other visible
features. Combining it with the BS2pe Motherboard and a suitable output
device, one can construct a complete inspection system in a very
compact form factor.
TAOS did a good job in making the TSL1401-DB easy to use with
a very usable 50-page manual. The AVR coprocessor firmware provides a
completely scriptable imaging
front end that captures images in the background and locates features,
freeing up the microcontroller for other tasks. Parallax has also
included a
programming template and examples for both the BS2pe Motherboard and
the
BASIC Stamp 2.
A PC-hosted montiro program is offered as an aid to seeing
what the camera sees in real time, both
for
setting up and alignment and for trying various detection strategies.
This program provides both an oscilloscope view of the
pixels, as well as a sweeping view of multiple scans laid side-by-side.
It also includes user-selectable measurement tools for locating edges,
counting pixels, computing extrema and averages, and the like. This
program is designed to be used with the BASIC Stamp 2pe Motherboard and
automatically uploads the PBASIC code necessary for communication.
Future add-ons for the TSL1401-DB's topside mezzanine
connector
include the LightSync-DBM for synchronizing to fluorescent lighting,
and the Strobe-DBM, which will provide LED front-lighting.
Features:
- 128-pixel linear image sensor (TAOS TSL1401R)
- Focusable imaging lens
- Simple three-pin interface with analog pixel output
- Connector: 12-pin Hirose DF11 (M) main connector, 6-pin
Hirose DF11 (F) accessory connector
- Lens: 7.9mm focal length, f2.4 fixed aperture, manual
focus, 12mm x 0.5mm thread
- Exposure Time: 267µS to 68mS (MoBoStamp-pe, Propeller, SX,
PIC, AVR, etc.); 2.03ms to 68ms (BS2)
- Resolution: 128 pixels (grayscale); 255 pixels
(interpolated binary)
- Direct plug-in for Parallax motherboards (e.g.
MoBoStamp-pe) and adapters
- Accessory socket for future add-ons, such as LED strobes
Applications:
- Detection of objects, edges, gaps, holes, liquid
levels,
etc.
- Non-contact measurement of height, width, diameter, position
- Line following for robots
- Light and flame detection and location for robots
- Simple barcode reading
Key Specifications:
- Power Requirements: 3.3V to 5.0V at less than 5mA
- Dimensions (with lens): 1.35 x 1.35 x 1.22 in (34.3 x 34.3
x 31mm)
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