18-12-2012, 02:07 PM
Parallax Laser Range Finder
Parallax Laser Range Finder.pdf (Size: 576.2 KB / Downloads: 16)
Features
Optimal measurement range of 6–48 inches (15–122 cm) with an accuracy error <5%, average 3%
Maximum object detection distance of ~8 feet (2.4 meters)
Compact module with integrated CMOS camera and laser system
Single row, 4-pin, 0.1” header for easy connection to a host system
All engineering materials released as open source under a Creative Commons license; see page 11
Key Specifications
Power Requirements: 5 VDC @ 150 mA
Communication:
Asynchronous serial 300–115,200 baud with automatic baud rate detection
Operating temperature: 32 to 122 °F (0 to 50 °C)
Dimensions: 3.95" W x 1.55" H x 0.67" D (10.05 W x 3.95 H x 1.7 D cm)
Application Ideas
Distance or liquid level measurements
Object detection and/or avoidance
Item counting
Status Indicator
A visual indication of the LRF Module’s operating state is given with the on-board LED (Light-Emitting Diode). The LED is located on the back side of the LRF near the center of the board. The LED denotes four states of the Module:
1.
Green: Idle state. Waiting for a valid command to be sent by the host.
2.
Red: Active state. For example, performing a range calculation or capturing an image with the camera.
3.
Orange (Solid): Baud rate detection state. The LRF is waiting for a “U” character to be sent by the host in order to automatically set the communications baud rate. Occurs on LRF power-up only. See, Usage, page 2, for more details.
4.
Orange (Blinking): Error state. The LRF has malfunctioned. A message identifying the failed operation will be transmitted on the SOUT (Serial Out) pin. See Error Modes, page 9, for more details.