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Light-to-Frequency EVM
User's Guide
L
-
-F
IGHT
TO
REQUENCY
The Light-to-Frequency Converter Evaluation Module facilitates evaluation of the TAOS family of light-
to-frequency converter optical sensors through the use of a motherboard and a set of device-specific
daughterboards. The EVM is designed to interface via a USB port to a host PC running the Windows-
compatible host software application. Several of the daughterboards also feature light-emitting diode
(LED) light sources which can be controlled from the host software to allow evaluation of the sensors
in a variety of physical sensing arrangements.
G
S
ETTING
TARTED
On most PCs, installation will automatically start when the CD-ROM is inserted into the drive. If the
installation does not begin:
Click Start
Click Run
Type D:\setup and press Enter. IMPORTANT: Use the appropriate drive letter in the above
command to install the software. CD-ROMs are commonly D:
The installation program will guide you through the product installation
Refer to the ReadMe file on CD for the latest installation instructions.
USB EVM H
ARDWARE AND
The specification and system requirements for the hardware portion of the Light-to-Frequency (LTF)
EVM USB module follow:
System Requirements: Notebook or Desktop PC running Windows 98, 2000, NT4.0, XP
Host Connection: USB v2.0 using A-type connector
EVM Connection: Mini B-type connector
Software Installation: CD-ROM
The Light-to-Frequency Converter EVM comes assembled and consists of three main parts:
1. A motherboard
2. Set of Six Daughterboards, each with a different light-to-frequency converter sensor
3. A USB cable
NOTE: Please leave the LTF EVM installation CD-ROM inserted in the drive. This will simplify
the USB Driver Installation steps. The LTF EVM USB driver is located in the D:\FTDI directory
on the CD-ROM. This directory can be specified if it is necessary to manually install the driver
from a specific location.
C
E
ONVERTER
VALUATION
D
D
RIVER
ESCRIPTION
1 of 10
M
O
ODULE
VERVIEW
Rev 1.2
www.taosinc.com
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Related Manuals for TAOS TSL230RD
Summary of Contents for TAOS TSL230RD
- Page 1 ODULE VERVIEW The Light-to-Frequency Converter Evaluation Module facilitates evaluation of the TAOS family of light- to-frequency converter optical sensors through the use of a motherboard and a set of device-specific daughterboards. The EVM is designed to interface via a USB port to a host PC running the Windows- compatible host software application.
- Page 2 Daughterboards Six daughterboards are included with the Light-to-Frequency Converter EVM supporting the evaluation of the following devices: TSL230RD, TSL235R, TSL237S, TSL237T, TSL245R, and TSL238D. Some of the daughterboards contain LEDs in either transmissive or reflective configurations. The daughterboard configurations are summarized below in Table 1.
- Page 3 An Evaluation System for the TAOS Light-to-Frequency Converters Table 1 - Daugherboard Configuration and Sensing Geometry Device Configuration Geometry TSL230RD Vertical TSL235R Transmissive Horizontal TSL237S Transmissive Horizontal TSL237T Infrared Reflective Vertical TSL245R Infrared Reflective Horizontal TSL238D Infrared Reflective Vertical Any of the six daughterboards may be installed in either of the sockets A or B. To install a daughterboard, align the connector on the bottom of the daughterboard with either of the sockets A or B.
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Page 4: Software Execution
OFTWARE Software Execution To start the LTF EVM host application, click: Start -> Programs -> TAOS Light-to-Frequency Converter EVM -> Light-to-Frequency Converter EVM After the EVM application is executed, a Main dialog window (see below) will appear. Graphical User Interface (GUI) The LTF EVM demo application consists of a main window with a control section on the left-hand side, and up to two daughterboard windows depending upon how many daughterboards are installed. - Page 5 An Evaluation System for the TAOS Light-to-Frequency Converters time. This integration time is controlled independently for each daughterboard. The frequency is then determined by dividing the count value by the integration time to get units of Hz (cycles per second).
- Page 6 The TSL230RD daughterboard window provides a graphical representation of the programmable features of the TSL230RD device. The TSL230RD daughterboard window can be seen on the right in Figure 2. Buttons are used to control the state of the sensitivity and output scaling input programming lines on the evaluation device.
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Page 7: Strip Chart
An Evaluation System for the TAOS Light-to-Frequency Converters Reading = (Signal + Ambient) - Ambient Ambient subtraction is useful in cases where measurements are being made using the LED in the presence of significant ambient light. Ambient subtraction only works well in situations in which the ambient light is steady or varying slowly. - Page 8 An Evaluation System for the TAOS Light-to-Frequency Converters Appendix www.taosinc.com 8 of 10...
- Page 9 An Evaluation System for the TAOS Light-to-Frequency Converters www.taosinc.com 9 of 10...
- Page 10 An Evaluation System for the TAOS Light-to-Frequency Converters www.taosinc.com 10 of 10...