xii
3.7 Voltage Regulator Circuit 28
3.8 Circuit Diagram Max 232 Serial Level Converter 29
3.9 Max 232 Serial Level Converter 29
3.10 Circuit Diagram Microcontroller ATMega32 31
3.11 Microcontroller ATMega32 31
3.12 Circuit Diagram Relay Driver ULN2803AG 33
3.13 Relay Driver ULN2803AG 33
3.14 Electromagnetic Lock 33
3.15 Flow Chart for Initializing System 35
3.16 Programming with command SMS 36
3.17 Flow Chart for Security System 36
3.18 Flow Chart for GSM System 37
4.1 Block Diagram Application Reset System 39
4.2 Block Diagram Application Lock Door System 40
4.3 Block Diagram Application Unlock Door System 40
4.4 Block Diagram Application Check Status Door 41
4.5 Block Diagram Security Warning Alert 42
4.6 Block Diagram Security Users 43
4.7 Block Diagram Security Password 43
4.8 Block Diagram Security Command 44
5.1 Product Control Door Lock System Via SMS 46
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