Si1146 UVIRSlider2EK Demo Kit Si1146 UVIRSLIDER2EK DEMO KIT USERS GUIDE 1. Kit Contents The Si1146 UVIRSlider2EK Demo Kit contains the following items: Si1146 UVIRSlider2EK Demo Board Si1146 UVIRSlider2EK Demo Board Quick Start Guide USB Cable 2. Introduction The Si1146 UVIRSlider2EK Demo Board implements a UV Index sensing function based around the Si1146 UV, infrared proximity, and ambient light sensor. As shown in Figure 1, the main components of the board are the Si1146 sensor (U2), the C8051F800 microcontroller (U1), and two infrared emitters (DS1 and DS2). Hardware is also provided on-board to facilitate code development for the C8051F800 and communications with software support packages over a USB interface. The firmware running on the C8051F800 measures the UV Index of the environment of the Si1146 sensor and indicates the UV Index detected by illuminating blue LEDs on the board. The board is also capable of running a touchless slider algorithm using infrared light energy detected by the Si1146, while each of the two infrared emitters are independently activated. The infrared light from these emitters will be reflected back to the Si1146 by any object that is placed in proximity to the board. The left-right position is then calculated from these two measurements and used to illuminate the appropriate signal LED. If no object is close enough to the board, the measured signal levels will fall below pre-determined thresholds, and no signal LEDs will be illuminated. In addition to indicating the current position, the algorithm is also able to detect different gestures from the infrared sensor, as described in Table 2 on page 3. The Si1146s ambient light sensor (ALS) is also monitored by the software, which can determine the amount of ambient light present. On this board, the infrared emitters used are OSRAM part number SFH 4056. These emitters have a power rating of 40 mW and a half-angle of 22 degrees. Other emitters with different characteristics may also be used, depending on the specific application requirements. Note: The touchless infrared position and gesture detection implemented in the example is patent pending. DS10 UVIRSLIDER2EK +5V IN P1 SILICON LABS U3 www.silabs.com U1 F326 F800 DS1 DS2 U2 Figure 1. Si1146 Slider Demo Board Rev. 0.1 1/14 Copyright 2014 by Silicon Laboratories Si1146 Slider Demo Kit DS8 DS9 DS14 DS5 DS6 DS7 DS4 DS3 DS12 DS11 DS13Si1146 UVIRSlider2EK 3. Running the Pre-Loaded UV Index Demo 1. The board receives its power over the USB interface. Connect one end of a USB cable to the USB connector (P1) on the Si1146 UVIRSlider2EK Demo Board and the other end to a USB Port on the PC. 2. The red LED DS10 should light on the board, indicating that it is receiving power from the USB. 3. The visible blue LEDs will light according to the perceived UV Index of the environment above the board. 4. See Table 1 on page 2 for a description on what the number of blue LEDs illuminated represents. Table 1. UV Demo Output Description Blue LEDs UV Index UV Index Description 5 11+ Extreme 4 8,9,10 Very High 3 6,7 High 2 3,4,5 Moderate 11,2 Low 4. Software Overview The UVIRSLIDER2EK is supported by the UVIRSLIDER Demo application and the Si114x Programmer s Toolkit. The software can be downloaded from the web at: