Light To Frequency 2 User Manual
Contents
1. Light To Frequency 2 manua All Mikroelektronika s development systems feature a large number of peripheral modules expanding microcontroller s range of application and making the process of program testing easier In addition to these modules it is also possible to use numerous additional modules linked to the development system through the I O port connectors Some of these additional modules can operate as stand alone devices without being connected to the microcontroller 7 MikroElektronika SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD waking ib siw ple Light To Frequency 2 The Light to Frequency 2 additional board is used to convert light into frequency Key features Communicates directly with a microcontroller Absolute output frequency tolerance of 5 Nonlinearity error typically 0 2 at 100 kHz Power supply 3 3 or 5V DC Figure 1 Light to Frequency 2 additional board How to connect the board The Light to Frequency 2 board is connected to a development system via a 2x5 connector CN1 on the additional board and one of 2x5 port connectors on the development system How to use the board The operation of this additional board is based on converting light into square wave voltage pulses or pulse train The frequency of voltage pulses obtained in this way is directly proportional to light intensity received by the on board sensor The higher light intensity on the sensor2. the higher pulse frequency The sensitivity of the on board sensor depends on the logic levels of pins S1 and SO table 1 The pulse frequency may be reduced by dividing with numbers contained in table 2 SENSITIVITY fo SCALING divided by The meaning of deisgnations used in the tables ee L Logic0 H Logic1 Table 1 Table 2 MikroElektronika 2 54mm FRENQ OUT CS WWE8 9L Amr JT Li i AA IGT UKOMIKA Si LIS DEVELOPMENT TOOLS FO EMBEDDED WORLD z l r r rr irr gt x R s Al CxS U fim SALAS 2 iD zil PODTrY A uct Figure 4 Light to Frequency connected to a development system Figure 3 Dimensions of the board MikroElektronika poddns uepios aouu mmm amp B WOOD SOJILUMPOUJO ze SN JOe UOD o e is u JOU op sjesodosd ss ulsnq 10 SIUSLULUOD suoijsenb Aue aaey no Jl ye 49491 INOA 9ejd se jd uoewoyzu jeuonppe pasu un o sjonpoid ino Jo Aue YUM suis qoid aulos SRE aJe noA jj WoT 3oy IU MMM ye IN Ino SIA sp ld slonpoud ind Jode aoi wea eter noA Jj QTYOM Q34aqGq38W3 YO4 SNOILNTOS JYVMCYVH ANY JYVMLAIOS
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