UVIRSLIDER2EK Datasheet UVIRSLIDER2EK | P1-P3

Si1146 UVIRSlider2EK

Demo Kit

Si1146 UVIRSLIDER2EK DEMO KIT USER’S 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 Si1146’s 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.

Figure 1. Si1146 Slider Demo Board

DS13

DS10

DS11

F326

SILICON LABS

www.silabs.com

UVIRSLIDER2EK

DS12

F800

DS8

DS1

DS2

DS9

DS14

DS5

DS6

DS7

DS4

DS3

+5V_IN

Si1146 UVIRSlider2EK

2 Rev. 0.1

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.

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: http://www.silabs.com/products/sensors/pages/optical-sensor-

software.aspx.

The UVIRSLIDER Demo application allows the user to select the UV Index demo, the IR Slider demo, or the UDP

Waveform Viewer. The UV demo includes a GUI that displays the full 11+ UV Index value and the 5-level UV sun

exposure level. The IRSLIDER demo tracks the movement of your hand over the 8 LEDs on the board using

proximity to sense the position of your hand. The IRSLIDER demo can also detect hand gestures as described in

Table 2. The UDP Waveform Viewer allows users to see real-time infrared proximity and ambient light

measurements from the Si1146 in a graphical form.

The Si114x Programmer's Toolkit API enables rapid development of Si114x software in a PC environment using

the Si1146 UVIRSlider2EK Demo Board. The Si114x Programmer's Toolkit contains example source code that

allows developers to get started quickly and then tailor the code to their needs. In addition, the Silicon Labs

Integrated Development Environment (IDE) provides a means of developing code for the C8051F800 and uses the

USB connection on the board to program the MCU and perform in-system debugging.

4.1. Using the UVIRSlider2EK Demo Board with the UVIRSLIDER Demo Application

The Si1146 UVIRSlider2EK Demo Board is supported by the UVIRSLIDER Demo application. The UVIRSLIDER

Demo application allows the user to run the UV Index or IR Slider demos as well as launch the UDP Waveform

Viewer. The UDP Waveform Viewer allows users to see real-time infrared proximity and ambient light

measurements from the Si1146 in a graphical form. The communications interface to the Si1146 UVIRSlider2EK

Demo Board is provided over the USB connection.

To use the UVIRSLIDER Demo with the Si1146 UVIRSlider2EK Demo Board, perform the following steps:

1. Connect the Si1146 UVIRSlider2EK Demo Board to the PC using a USB cable.

2. Launch the UVIRSLIDER Demo. If you do not have this application, it is available for download at the link

provided at the beginning of the Software Overview description.

3. Select the desired demo from the Main Menu.

4. Follow the instructions on the screen for how to use the demo.

5. The UDP Waveform Viewer can be launched by pressing on the Waveform Viewer button on the demo

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

Si1146 UVIRSlider2EK

Rev. 0.1 3

application screen.

Note: The the Si114x Programmer’s Toolkit, and the IDE cannot connect to the Si1146 UVIRSlider2EK Demo Board at the

same time. Be certain to disconnect from the board in one software package before trying to connect in the other.

Figure 2 shows an example of the UVIRSLIDER Demo main window when connected to the Si1146

UVIRSlider2EK Demo Board.

Figure 2. UVIRSLIDER Demo Main Window

Table 2. Recognized Gestures

Gesture Name Parameter Description of Action and LED Indication

Pause Position Hold hand steady in a single position above the board for 3/4 sec-

ond. Current position LED will blink briefly.

Swipe Left Speed Move hand rapidly from the right side to the left side of the board.

LEDs will briefly indicate a leftward sweep pattern.

Swipe Right Speed Move hand rapidly from the left side to the right side of the board.

LEDs will briefly indicate a rightward sweep pattern.

P1-P3 P4-P6 P7-P7

UVIRSLIDER2EK

Mfr. #:

Buy UVIRSLIDER2EK

Manufacturer:

Silicon Labs

Description:

Sensor Development Tools Multiple Function Sensor Development Tools UV Index/IR Slider EvlKit Si114x/Si1132

Lifecycle:

New from this manufacturer.

Delivery:

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