RFID based Secured access system implemented on 8051 microcontroller . This is a very useful application of RFID and is very commonly used in institutes, offices, homes and so on. An RFID system consists of a reader device and a transponder. A transponder or tag has a unique serial number which is identified by the reader.
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LCD Interfacing with ATmega32 Microcontroller
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The 16x2 will have 32 characters in total 16in 1st line and another 16 in 2nd line. Here one must understand that in each character there are 5x10=50 pixels so to display one character all 50 pixels must work together. But we need not to worry about that because there is another controller (HD44780) in the display unit which does the job of controlling the pixels.
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Automatic Staircase Light using ATmega32 Microcontroller
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The circuit works on two conditions - one is presence of light in its location and second is presence of human being, only when these two conditions are met, the controller turns the backup light ON.
These two conditions are tested by two sensors one is LDR and other is Motion sensor module. The LDR senses the presence of light and Motion sensor detects the presence of a human being in its range.
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