RF based Wireless Robot using 8051 Microcontroller
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This presentation summarizes the 8051 microcontroller and its use in an RF-based remote controlled car project. It describes the key components of the 8051 including RAM, ROM, I/O ports, and timers. It then discusses the RF transmitter and receiver modules used, including the HT12E and HT12D encoder and decoder ICs. The hardware and software design of the remote controlled car is presented, including interfacing the 8051 with the motor driver, RF modules, and remote control. The programming code is shown and a working video is referenced. Applications and future developments are briefly discussed before concluding with thanks.
RF based Wireless Robot using 8051 Microcontroller
- 1. Presentation On Microcontroller 8051 Presented By - Rahul Kumar B.Tech /ECE 1325271 Department Of ECE Shaheed Udham Singh College of Engg. & Tech.
- 2. EMBEDDED SYSTEM • Special-purpose computer system designed to perform a dedicated function. • Performs one or a few pre-defined tasks, usually with very specific requirements, and often includes task-specific hardware and mechanical parts not usually found in a general-purpose computer.
- 3. INTRODUCTION TO 8051 • 4K bytes internal ROM • 128 bytes internal RAM • Four 8-bit I/O ports (P0 - P3). • Two 16-bit timers/counters • One serial interface Microcontroller A single chip RAM I/O Port Timer Serial COM Port CPU ROM
- 4. Pin Description of the 8051
- 5. Inside Structure of 8051 Microcontroller
- 6. Software Used • KEIL uVISION
- 7. PROJECT :- RF Based Car Team Members :- Rahul Kumar Sahil Kumar Karan Dhall
- 8. Components • AT89c51 • Battery • LED(6) • HT12E • HT12D • L293D • Resistors 1 k ohm(7) 10 k ohm 50 k ohm 100 k ohm • Xtal – 11.0592 KHz • Tectile switch (5) • DC motors • Voltage Regulator(IC7805) • Wheels and chechis • Capacitors 1 n f 10 uf 1uf 33pf(2)
- 9. Introduction of IC HT12E • HOLTEK Semiconductor. • HT12E is a encoder integrated circuit that belongs to 212 series of encoders. • They are paired with 212 series of decoders for use in remote control system applications. • HT12E converts the parallel input into serial outputs. It encodes the parallel data into serial for transmission through an RF transmitter.
- 10. Pin Diagram:
- 11. Introduction of IC HT12D • HT12D is a decoder integrated circuit that belongs to 212 series of decoders. • This series of decoders are mainly used for remote control system applications. • HT12D converts the serial input into parallel outputs. It decodes the serial addresses and data received by an RF receiver, into parallel data and sends them to output data pins.
- 13. Pin No Function Name 1 8 bit Address pins for input A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 Ground (0V) Ground 10 4 bit Data/Address pins for output D0 11 D1 12 D2 13 D3 14 Serial data input Input 15 Oscillator output Osc2 16 Oscillator input Osc1 17 Valid transmission; active high VT 18 Supply voltage; 5V (2.4V-12V) Vcc Pin Description of both:
- 14. HT12E/HT12D FEATURES: • Operating voltage: 2.4V~12V • Low power and high noise immunity. • Low standby current. • Capable of decoding 12 bits of information. • Binary address setting. • Received codes are checked 3 times. • 8 address bits and 4 data bits. • Built-in oscillator needs only 5% resistor. • Valid transmission indicator.
- 15. RF Transmission and Reception
- 16. RF Transmitter 1 2 3 4 Block Diagram Of RF Transmitter RF Transmitter Module
- 17. RF Receiver 1 2 3 4 5 6 7 8 RF Receiver ModuleBlock Diagram of RF Receiver
- 18. Interfacing Of HT12E with RF Tx
- 19. Interfacing Of HT12D with RF Rx
- 20. L293D • L293D is a motor driver. As its name suggests it can drive a motor . • Since the output voltage of 8051 is limited to 5V only thus motors with higher required voltage need some drivers to provide them their desired input voltage. • What L293D does is, it takes the (0/5v) input from the output pins of 8051 microcontroller and forwards the output through itself of higher voltage. • Connecting a DC motor directly to the pins of 8051 would not work. It may even damage the microcontroller.
- 21. Interfacing of 8051 with L293D
- 24. PROGRAM CODE #include<reg51.h> sbit sw1=P1^4; sbit sw2=P1^5; sbit sw3=P1^6; sbit sw4=P1^7; sbit m1=P1^0; sbit m2=P1^1; sbit m3=P1^2; sbit m4=P1^3; void main() { m1=m2=m3=m4=0; while(1) { if(sw1==1) { m1=1; } else { m1=0; } if(sw2==1) { m2=1; } else { m2=0; } if(sw3==1) { m3=1; } else { m3=0; } if(sw4==1) { m4=1; } else { m4=0; } } }
- 25. WORKING VIDEO
- 26. Applications of RF Module • Data Communication • Escalators & Elevators • Military • Security Monitoring • Unmanned Vehicles Receiver Transmitter
- 27. Future Developments • Spy cameras can be added for security purpose. • GPS Module can be added to get the location or to move the car to a specific location. • For Military , Remote weapons can be added to use as fighter Robo car.
- 28. THANKS FOR YOUR PRECIOUS TIME