1. BATTERY CHARGING BY THYRISTOR TRIGGERING CONTROL
SUBMITTED BY
EDGEFX TEAM

2. ABSTRACT The aim of the project is DC power control by microcontroller
Zero crossing point is detected by zero crossing detector and fed to the microcontroller
Rectified and controlled output is given to the DC load

3. PROPOSED SYSTEM To control DC power by microcontroller
Using zero crossing point is detected by zero crossing detector and fed to the microcontroller. The microcontroller fires the thyristor by using the opto isolator

4. BLOCK DIAGRAM

5. HARD WARE EQUIPMENTS POWER SUPPLY BLOCK
MICROCONTROLLER (AT89S52/AT89C51)
OPTO-ISOLATOR
OPAMP LM358
TRIAC
LED
RESISTORS & CAPACITORS
1N4007 & 1N4148

7. EMBEDDED SYSTEMS Definition for :- EMBEDDED SYSTEMS
A combination of hardware and software which together
form a component of a larger machine.
An example of an embedded system is a microprocessor that
controls an automobile engine.
An embedded system is designed to run on its own without
human intervention, and may be required to respond to
events in real time.

8. EMBEDDED SYSTEMS

9. AT89S52 MICRO CONTROLLER Compatible with MCS®-51 Products
• 8K Bytes of In-System Programmable (ISP) Flash Memory
• 4.0V to 5.5V Operating Range
Crystal Frequency MHZ
• Three-level Program Memory Lock
• 256 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Three 16-bit Timer/Counters
• Eight Interrupt Sources
• Full Duplex UART Serial Channel
• Watchdog Timer
AT89S52

10. PIN DIAGRAM OF AT89S52

11. PWM
The PWM switching frequency has to be much faster than what would affect the load, which is to say the device that uses the power.
The term duty cycle describes the proportion of on time to the regular interval or period of time;
a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.

12. PWM APPLICATIONS Telecommunications Power delivery Voltage regulation
Audio effects and amplification.

13. TSOP 1738 RECEIVER PIN DIAGRAM
It’s a standard IR remote control
receiver
supporting all major transmission codes
Pin1 – Connected to Ground
Pin2 – Connected to Vcc
Pin3 – Output Pin
In Between 1st Pin and 2nd Pin we have
to connect one Capacitor
TSOP 1738 Receives 14—bit of data

14. LM 358 (OPAMP) Internally frequency compensated for unity gain.
Large dc voltage gain: 100 Db.
Wide bandwidth (unity gain): 1 MHz (temperature compensated)
Wide power supply range:
Single supply: 3V to 32V
or dual supplies: ±1.5V to ±16V
Very low supply current drain (500 µA)-essentially independent of supply voltage.
Low input offset voltage: 2 mV
Input common-mode voltage range includes ground.
Differential input voltage range equal to the power supply voltage.

15. LM 358 PIN DIAGRAM 1 - Output 1 2 - Inverting input
3 - Non-inverting input
4 – VCC-
5 - Non-inverting input 2
6 - Inverting input 2
7 - Output 2
8 – VCC+

16. BC547 The BC547 transistor is an NPN Epitaxial Silicon Transistor.
The BC547 transistor is a general-purpose transistor in small plastic packages.
It is used in general-purpose switching and amplification BC847/BC547 series 45 V, 100 mA NPN general-purpose transistors.
Whenever base is high, then current starts flowing through base and emitter and after that only current will pass from collector to emitter

17. SOFTWARE REQUIREMENTS
PROGRAMMING LANGUAGES Embedded C , ALP (Assembly Language) COMPILERS: Keil 2.0/3.0uv DUMPING SOFT WARE: Using Micro controller flash Software we are dumping our HEX Code into Micro Controller

18. KEIL COMPILER WINDOW

19. BIBILOGRAPHY
The Microcontroller and Embedded systems” by Muhammad Ali Mazidi and Janice Gillispie Mazidi , Pearson Education.
ATMEL 89S52 Data Sheets.

20. BIBILOGRAPHY
The Microcontroller and Embedded systems” by Muhammad Ali Mazidi and Janice Gillispie Mazidi , Pearson Education.
ATMEL 89S52 Data Sheets.

21. THANK ‘Q’