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Referring to the back side of the LRF Module below, the Parallax Propeller (U2), its supporting
electronics, and the camera interface circuitry are located on the right and the laser diode control circuitry
is on the left. A dotted line (not printed on the actual LRF Module) indicates the recommended cutting
point if the user wishes to separate the laser diode control circuitry from the rest of the LRF for custom
modifications or projects.
A Prop Clip (Parallax #32200) or Prop Plug (Parallax #32201) can attach to the four pads (JP2) on the
back of the LRF for reprogramming of the Propeller's firmware.
Eight unused GPIO pins (P16-P23) are available via surface mount pads near the Propeller processor. The
pins are spaced to support a dual-row, 0.1" male header.
Open Source Files
All engineering materials are released as open source under a Creative Commons Attribution 3.0 United
States license (http://creativecommons.org/licenses/by/3.0/us/), allowing free distribution and reuse.
The following items are available from the 28044 product page at www.parallax.com:
Schematic
Firmware for Propeller processor
Bill-of-Materials
PCB Layout/Gerber Plots
Mechanical Drawing
Example Code for BASIC Stamp 2
Example Code for Propeller P8X32A
LRF Image Viewer Software for Windows
Additional Resources
Grand Idea Studio's
www.grandideastudio.com/portfolio/laser-range-finder/
Demonstration videos of the LRF Module:
Sam's Laser FAQ:
Copyright © Parallax Inc.
Laser Range Finder
web page:
www.repairfaq.org/sam/lasersam.htm
Parallax Laser Range Finder (#28044)
www.youtube.com/watch?v=MqYRM6calOI
v1.0 9/16/2011 Page 11 of 24
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