Bluetooth Controlled Robot built using ATmega8 Micro-controller and HC-05 Bluetooth Module.

1. (ATmega8 Serial Communication via Bluetooth)
Stack Project

2. The project aims at
designing a Robot
which can be
controlled using
Bluetooth

3. Bluetooth controlled car is
a robot which is built using
Atmega8 Microcontroller
in which serial
communication is done via
Bluetooth and
programming is done in
embedded C language.

5. ATMEGA-8
Microcontroller
HC-05
Bluetoo
th
module
L293D Motor
Driver
Android
phone /
Laptop

6. High performance and low power microcontroller
RISC Architecture
Up to 16MIPS throughput 16MHz
1 KB RAM and 512 Bytes EEPROM
Programmable Serial USART
Programmer friendly

8. RF based Wireless
Technology
Low cost , short
range
less power
consuming
Speed less
than 1
Mbps!

9. HC-05 is an
embedded
Bluetooth serial
communication
module
It has two work
modes
• order-response work
mode
• automatic connection
work mode

10. Command Response Parameter
AT OK None
AT+RESET OK None
AT+VERSION? +VERSION:
<Parameter> OK
Parameter: Version
number
AT+ORGL OK None
List of AT Commands

11. AT+PSWD=<Param> OK
AT+ PSWD? + PSWD : <Param>
OK
” Param: passkey
Default: “1234
AT+UART=<Param1>,
<Param2>,<Param3>
OK Param1-baud rate
Usually 9600
Param2-stop bit
Param3- parity bit

12. • Common Specifications of HC-05:
• Radio Chip : CSR BC417
• Memory : External 8Mbit Flash
• Output Power: : -4 to +6 dbm class 2
• Sensitivity : -80dbm Typical
• Bit Rate : EDR, up to 3Mbps
• Interface : UART
• Antenna : Built-in
• Dimension : 27W x 13H mm
• Voltage : 3.1 to 4.2 VDC
• Current : 40mA max
Important
Specs Of HC-05

13. Full duplex Asynchronous or
Synchronous Operation
Master or slave synchronous
operation
Framing Error Detection
Multi-processor
communication Mode
Double speed Asynchronous
Communication Mode.

14. RXC TXC UDRE FE DOR PE U2X MPCM
R R/W R R R R R/W R/W
0 0 1 0 0 0 0 0
Register A :
UCSRA
Register B:
UCSRB
RXCIE TXCIE UDRIE RXEN TXEN UCSZ2 RXB8 TXB8
R/W R/W R/W R/W R/W R/W R R/W
0 0 0 0 0 0 0 0
Our Value : UCSRA -OXOO
Our Value : USCRA - 0X18

15. URSEL UMSEL UPM1 UPM0 USBS USCZ1 UCSZO UCPOL
R/W R/W R/W R/W R/W R/W R/W R/W
Register C:
USCRC
1 0 0 0 0 1 1 0
URSEL - - - UBRR-11 UBRR-10 UBRR-9 UBRR-8
UBRR-7 UBRR-6 UBRR-5 UBRR4 UBRR-3 UBRR-2 UBRR-1 UBRR-0
UBRRH
UBRRL:
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
Our Value: UCSRC – 0x86
Our Value: UBRRH, UBRRL - 75

17. PUSH-PULL four Channel Driver with Diodes
Designed to accept standard DTL or TTL logic levels
and drive inductive loads and switching power
transistors
Suitable for use in switching applications at frequencies
up to 5KHz
It is assembled in a 16 lead plastic package which has 4
centre pins connected together and used for heat
sinking.
L293D MOTOR DRIVER

19. Is an operating
system based
on Linux
Kerenel
It is designed
primarily for touch
screen mobile
devices like smart
phones and tablet
computers
User interface of
android is based
on Direct
Manipulation
Internal hardware such
as accelerometers,
gyroscopes and proximi
ty sensors are used by
some applications to
respond to additional
user actions

21. Can be used in examining mini tunnel and can also be
used in rescuing.
Concept can be used to control Home switch circuits
using Relay circuit
APPLICATIONS