SEN-14599 SparkFun

Table of Contents LIDAR-Lite v3HP Operation Manual and Technical Specifications 1 Laser Safety ......................................................................................................1 LIDAR-Lite v3HP Operation Manual Specifications 2 Physical .............................................................................................................2 and Technical Specifications Water Resistance ..............................................................................................2 Electrical ............................................................................................................2 Laser Safety Performance ......................................................................................................2 Interface .............................................................................................................2 WARNING This device requires no regular maintenance. In the event that the device Laser ..................................................................................................................2 becomes damaged or is inoperable, repair or service must be handled by Connections 2 authorized, factory-trained technicians only. Attempting to repair or service Wiring Harness ..................................................................................................2 the unit on your own can result in direct exposure to laser radiation and the I2C Connection Diagrams .................................................................................2 risk of permanent eye damage. For repair or service, contact your dealer or Standard I2C Wiring ....................................................................................2 Garmin for more information. This device has a protective housing which, Standard Arduino I2C Wiring .......................................................................3 when in place, prevents human access to laser radiation in excess of the PWM Wiring .................................................................................................3 accessible emission limit (AEL) for Class 1 laser products. This device should not be modified or operated without its housing or optics. Operating this device PWM Arduino Wiring....................................................................................3 without a housing and optics, or operating this device with a modified housing Operational Information 4 or optics that expose the laser source, may result in direct exposure to laser Technology ........................................................................................................4 radiation and the risk of permanent eye damage. Removal or modification of Theory of Operation ...........................................................................................4 the diffuser in front of the laser optic may result in the risk of permanent eye Interface .............................................................................................................4 damage. Initialization ..................................................................................................4 CAUTION Power Enable Pin ........................................................................................4 This device emits laser radiation. Use of controls or adjustments or I2C Interface ................................................................................................4 performance of procedures other than those specified herein may result in Mode Control Pin .........................................................................................4 hazardous radiation exposure. Settings ........................................................................................................4 This laser product is designated Class 1 during all procedures of operation. I2C Protocol Information 6 When the ranging feature of the device is activated, a laser emitter of a I2C Protocol Operation ......................................................................................7 ranging module may emit laser radiation and the device should not be aimed Read Operation ...........................................................................................7 toward anyone. Avoid looking toward the laser emitter or into the laser radiation (beam) when operating the device. It is advisable to turn off the Write Operation ............................................................................................7 ranging module when it is not in use. This device must be used only according Register Definitions ...........................................................................................7 to the directions and procedures described in this documentation. Control Register List ....................................................................................7 Do not leave this device within the reach of children. Detailed Control Register Definitions ...........................................................8 Frequently Asked Questions 10 NOTICE How do I use the device for fast-scanning applications .................................10 CLASS 1 LASER PRODUCT Classified EN/IEC 60825-1 2014 Does the device operate only on 5 Vdc .........................................................10 This product is in conformity with performance standards for laser products What is the spread of the laser beam ............................................................10 under 21 CFR 1040, except with respect to those characteristics authorized by How do distance, target size, aspect, and reflectivity affect returned signal Variance Number FDA-2016-V-2943 effective September 27, 2016. strength ..........................................................................................................10 How does the device work with reflective surfaces .......................................11 Diffuse Reflective Surfaces ........................................................................11 Specular Surfaces .....................................................................................11 How does liquid affect the signal ...................................................................11 1Specifications Connections Physical Wiring Harness Specification Measurement Size (LxWxH) 20 48 40 mm (0.8 1.9 1.6 in.) Weight 22 g (0.78 oz.) Operating temperature -20 to 60C (-4 to 140F) Water Resistance Wire Color Function Body of this device is rated IPX7, and can wthstand incidental exposure to Red 5 Vdc (+) water of up to 1 meter for up to 30 minutes. Orange Power enable (internal pull-up) IMPORTANT: The bare wire portion of the wiring harness is not water Yellow Mode control resistant, and can act as a path for water to enter the device. All bare-wire connections must either be made in a water-tight location or properly sealed. Green I2C SCL Blue I2C SDA Water may enter under the transmitting lens. This could affect performance, but will not affect IPX7 water resistance. Black Ground (-) There are two basic configurations for this device: Electrical I2C (Inter-Integrated Circuit)a serial computer bus used to Specification Measurement communicate between this device and a microcontroller, such as an Arduino board (I2C Interface, page 4). Power 5 Vdc nominal 4.5 Vdc min., 5.5 Vdc max. PWM (Pulse Width Modulation)a bi-directional signal transfer method Current consumption 65 mA idle that triggers acquisitions and returns distance measurements using the 85 mA during an acquisition mode-control pin (Mode Control Pin, page 4). Performance I2C Connection Diagrams Specification Measurement Standard I2C Wiring Range (70% reflective target) 40 m (131 ft) Resolution +/- 1 cm (0.4 in.) Accuracy < 2 m 5 cm (2 in.) typical* Accuracy 2 m 2.5 cm (1 in.) typical Mean 1% of distance maximum Ripple 1% of distance maximum Update rate (70% Reflective Target) Greater than 1 kHz typical Reduced sensitivity at high update rates *Nonlinearity present below 1 m (39.4 in.) Interface Specification Measurement User interface I2C PWM External trigger I2C interface Fast-mode (400 kbit/s) Item Description Notes Default 7-bit address 0x62 680F electrolytic capacitor You must observe the correct polarity when Internal register access & control installing the capacitor. PWM interface External trigger input Power ground (-) connection Black wire PWM output proportional to distance at 10 s/cm I2C SDA connection Blue wire Laser I2C SCL connection Green wire Specification Measurement Wavelength 905 nm (nominal) 4.7k pull-up resistor In installations with long cable extensions Total laser power (peak) 1.3 W or with multiple devices on the I2C bus, you (not required in all applications) must install a 1k to 10k pull-up resistor Mode of operation Pulsed (256 pulse max. pulse train) on each I2C wire to account for cable Pulse width 0.5 s (50% duty cycle) capacitance. Pulse train repetition frequency 10-20 kHz nominal It is recommended to start with 4.7k resistors and adjust if necessary. Energy per pulse <280 nJ 5 Vdc power (+) connection Red wire Beam diameter at laser aperture 12 2 mm (0.47 0.08 in.) The sensor operates at 4.75 through 5.5 Vdc, Divergence 8 mRad with a max. of 6 Vdc. Logic rail connection The pull-up resistors connected to both I2C wires must connect to the logic rail on your microcontroller board. 2