LightRanger 2 click

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  • MIKROE-2509
  • MIKROE-2509
LightRanger 2 click  carries  VL53L0X  IC from STMicroelectronics, the word’s... more
Product information "LightRanger 2 click"

LightRanger 2 click carries VL53L0X IC from STMicroelectronics, the word’s smallest Time-of-Flight ranging and gesture detector sensor. The click is designed to run on either 3.3V or 5V power supply. LightRanger 2 click communicates with the target microcontroller over I2C interface and the following pins on the mikroBUS™ line: RST, INT.

Measuring range

The VL53L0X sensor can measure absolute distances up to 2m. Reported range is independent of the target reflectance.

FlightSense™

The VL53L0X integrates a leading-edge SPAD array (Single Photon Avalanche Diodes) and embeds ST’s second generation FlightSense™ patented technology.

FlightSense™ technology measures the time it takes for a photon to reach the nearest object. The photon travel time is multiplied by the speed of light, and from there a distance is calculated.

The photon travel time is not affected by reflectance, and this kind of technology is immune to ambient illumination and optical path variations.

VCSEL emitter

The VL53L0X’s 940nm VCSEL emitter (Vertical Cavity Surface-Emitting Laser), is totally invisible to the human eye, coupled with internal physical infrared filters, it enables longer ranging distance, higher immunity to ambient light and better robustness to cover-glass optical cross-talk.

Power consumption

The average power consumption at 10MHz is 20mW, and while in standby mode the typical power consumption is around 5uA.

Specifications

Type Proximity
Applications User detection for Personal Computers/ Laptops/Tablets and IoT devices, obstacle detection, distance measurement in applications, etc.
Key Features VL53L0X sensor, measures absolute range up to 2m, range is independent of the target reflectance, operates in high infrared ambient light levels
Key Benefits Equally sensitive to all objects regardless of color and reflectivity
Interface I2C,GPIO
Input Voltage 3.3V or 5V
Compatibility mikroBUS
Click board size S (28.6 x 25.4 mm)

Pinout diagram

This table shows how the pinout on LightRanger 2 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

NotesPinMikrobus logo.pngPinNotes
  NC 1 AN PWM 16 NC  
Enable EN 2 RST INT 15 INT Hardware interrupt
  NC 3 CS TX 14 NC  
  NC 4 SCK RX 13 NC  
  NC 5 MISO SCL 12 SCL I2C serial clock input
  NC 6 MOSI SDA 11 SDA I2C serial data
Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
Ground GND 8 GND GND 9 GND Ground

Programming

The code initializes the click and sets it in continuous conversion mode. Range data is read continuously and printed on UART.

01      tof_init(true);
02      tof_set_timeout(500);
03      tof_start_continuous(0);
04      Uart_Write_Text("TOF readyrn");
05
06
07      while(1)
08      {
09         range = tof_read_range_continuous_millimeters();
10         WordToStr(range, txt);
11         Uart_Write_Text("Range: ");
12         Uart_Write_Text(txt);
13         Uart_Write_Text("rn");
14
15         if (tof_timeout_occurred())
16            Uart_Write_Text("TIMEOUTrn");
17
18      }

 

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