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PROJECT DESCRIPTION

The project is designed to operate a led street light multiple number of times On or OFF as per the program. It overcomes the difficulties of switching the load on or off manually. This proposed system has an inbuilt real-time clock (RTC) to keep track of the time and thus to switch on or off the load accordingly.

Load shedding is what electric utilities do when there is a huge demand for electricity that exceeds the supply. Thus in a distribution system, electricity delivery needs to be precisely managed for specific period of time.

Programmable load shedding time management system is a reliable circuit that takes over the manual task of switching on/off the electrical devices with respect to time. It uses real-time clock (RTC) interfaced to a microcontroller of the 8051 family.

While the set time equals to the real time, then microcontroller gives command to the corresponding relay to turn on the load and then another command to switch it off as per the program. Multiple on/off time entry is the biggest advantage with this project.

LEDs require DC supply to operate. In this project, AC is converted to DC by a rectifier. A string of LEDs are connected in series and parallel combination through series capacitor and a rectifier to convert the AC to DC. It is thus made to operate at 230V AC directly. The series capacitor is used to reduce the voltage while the resistor is used to limit the starting current .

The voltage is then rectified to DC for maintaining a safe operating voltage for the LEDs. A number of LEDs are used to give adequate illumination from AC supply. Since a large voltage is dropped by a series element in between the supply and the load, the resistor value is deliberately kept low to minimize the power loss.

White LEDs are preferred to be used as they deliver bright light. A matrix keypad helps entering the time. A 7-sement display is interfaced to the microcontroller to display time.

Furthermore, the project can be enhanced by interfacing a GSM modem to the existing project so that the complete control of the load can be done by sending an SMS to the control unit. 

PROJECT HIGHLIGHTS
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm IST.
BLOCK DIAGRAM
Real Time Clock Based Solar LED Street Light Automation Using RTC and I2C Protocol
Hardware Requirements
  • 8051 series Microcontroller
  • 7-Segment Display
  • RTC
  • Keypad
  • Relay
  • Relay Driver IC
  • LED
  • Crystal
  • Transformer
  • Diodes
  • Regulator
  • Capacitors
  • Resistors
  • white LED’s
Software Requirements
  • Keil compiler
  • Language: Embedded C or Assembly
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