CONTENT
1. Abstract 4
2. Technology 5
3. Block Diagram 6
4. Regulated Power Supply 7
4.1 Description 7
4.2 Block Diagram 8
4.3 Circuit Features 9
4.4 Circuit Diagram 10
4.5 Power Supply Component Details 10
4.6 Limitations 11
4.7 Necessity of Regulated Power Supply 12
4.8 IC7805 & IC7812 13
5. RF Transmitter 14
5.1 RF Transmitter Module 14
5.2 RF Transmitter Circuit Diagram 15
6. RF Receiver 17
6.1 RF Receiver Module 17
6.2 RF Receiver Circuit Diagram 18
7. Encoder & Decoder 19
7.1 Encoder 22
7.2 Decoder 22
8. APR 9600 Voice Board 25
8.1 Features 25
8.2 APR 9600IC Description 26
8.3 APR 9600 Functional Description 27
8.4 APR 9600 Voice Board Schematic Diagram 28
8.5 APR 9600 Voice Board PCB Model 29
9. Amplifier Circuit 30
9.1 General Description 30
9.2 Absolute Maximum 33
10. Loud Speaker 35
11. Hardware Requirement 38
12. Software Requirement 38
13. Conclusion 39
14. References 40
LIST OF FIGURES
Fig 1: RF Transmitter Section: (At Railway Station) 6
Fig 2: RF Receiver Section: (At Train Coaches) 6
Fig 3: Voltage Regulator Diagram 8
Fig 4: Regulated Power Supply Block Diagram 8
Fig 5: Regulated Power Supply Circuit Diagram 10
Fig 6: Regulator Diagram 11
Fig 7: RF Transmitter Module 14
Fig 8: RF Transmitter Circuit Diagram 15
Fig 9: RF Receiver Module 17
Fig 10: RF Receiver Circuit Diagram 18
Fig 11: HT12E Encoder IC Pin Diagram 20
Fig 12: HT12D Decoder IC Pin Diagram 23
Fig 13: APR9600 IC Pin Diagram 26
Fig 14: APR9600 Functional Diagram 27
Fig 15: APR9600 Voice Board Schematic Diagram 28
Fig 16: APR9600 Voice Board PCB Model 29
Fig 17: Amplifier Circuit Diagram 31
Fig 18: Equivalent Schematic and Connection Diagram 32
Fig 19: LM386 IC Top View 32
Fig 20: Loud Speaker Diagram 35
LIST OF TABLES
Table 1: Voltage Regulator Specifications 13
Table 2: HT12E IC Pin Description 21
Table 3: HT12D IC Pin Description 24
1. ABSTRACT
Our project is “Automatic Station Name Announcement in...