automatic streetlight control using ldr ppt
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This document describes an automatic street light control circuit using an LDR (Light Dependent Resistor). The circuit uses an LM358 operational amplifier, a relay, an LDR, resistors, a capacitor, a transistor, and a lamp. It works by turning the street light on when the LDR detects low light levels and turning it off when high light levels are detected, thereby automatically controlling the street light and saving energy. The circuit was designed and simulated using Proteus software and implemented on a breadboard.
automatic streetlight control using ldr ppt
- 1. by:- Er. AnAnd kumAr mAuryA ELECTRICAL & ELECTRONIC ENGINEERING POWERPOINT PRESENTATION ON AUTOMATIC STREET LIGHT CONTROL USING LDR April 18, 2017 LDR BASE STREET LIGHT CONTROL 1
- 2. April 18, 2017 LDR BASE STREET LIGHT CONTROL 2 Unnecessary use of energy. There is no use of street light in day time and man power .
- 3. INTRODUCTION April 18, 2017 LDR BASE STREET LIGHT CONTROL 3 Many of the people have a phobia of darkness so that to assist them in such situation we have explained a simple circuit . It will automatically turn on street light in the way of LEDs or BULBs coupled with relay. Working this circuit is very much easy and also the power consumed by the circuit is very low because of the few components used in circuit.
- 4. IC-LM358 RELAY LIGHT DEPANDENT RESISTOR (LDR) RESISTOR (VR, FR) CAPACITOR TRANSISTOR LAMP COMPONENTS REQUIRED April 18, 2017 LDR BASE STREET LIGHT CONTROL 4
- 5. April 18, 2017 LDR BASE STREET LIGHT CONTROL 5 CIRCUIT DIAGRAM
- 6. IC-LM358 April 18, 2017 LDR BASE STREET LIGHT CONTROL 6 o The LM358 has consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. o Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. o The LM358 and LM2904 are available in a chip sized package using National’s micro SMD package technology.
- 7. IC-LM358 April 18, 2017 LDR BASE STREET LIGHT CONTROL 7
- 8. RELAY April 18, 2017 LDR BASE STREET LIGHT CONTROL 8 o Relay is an electrically operated switch . o Current flowing through the coil of the relay creates a magnetic field which attracts a lever and changes the switch contacts. o It has 3-pin, 4-pin, 5-pin etc.….. But we have use 5-pin in our circuit diagram.
- 9. LIGHT DEPANDENT RESISTOR (LDR) April 18, 2017 LDR BASE STREET LIGHT CONTROL 9 o Sensitivity depends on intensity of light. o Resistance of LDR decrease with increase in intensity of light and vive-versa
- 10. RELAY April 18, 2017 LDR BASE STREET LIGHT CONTROL 10 o As no input state the COM is connected to NC and when operating V is applied to relay coil get energized and COM is now with NO
- 11. RESISTOR April 18, 2017 LDR BASE STREET LIGHT CONTROL 11 o It is a passive component having two terminals that are used to mange the current flow in the circuit. o A current that flows via a resistor is directly proportional to the voltage that appeared into resistor o Two types: (1) Fixed value resistor (2) Variable resistor
- 12. Fixed type Variable type RESISTOR April 18, 2017 LDR BASE STREET LIGHT CONTROL 12
- 13. CAPACITOR April 18, 2017 LDR BASE STREET LIGHT CONTROL 13 o A capacitor (originally known as a condenser) is a passive two terminal electrical component used to store electrical energy temporarily in an electric field. o The forms of practical capacitors vary widely, but all contain at least two electrical conductors separated by a dielectric o The conductors can be thin films ,foils or sintered beads of metal or conductive electrolyte, etc. o The nonconducting dielectric acts to increase the capacitor's charge capacity. A dielectric can be glass, ceramic, plastic film, air, vacuum, paper, mica, oxid layer etc.
- 14. CAPACITOR April 18, 2017 LDR BASE STREET LIGHT CONTROL 14 Types of capacitor Symbols
- 15. BC547 TRANSISTOR April 18, 2017 LDR BASE STREET LIGHT CONTROL 15 o It is a general purpose silicon, NPN bipolar junction transistor. It is used for amplification and switch purpose o Here, for switching purpose biased so that it remains on if there is signal at its base other wise completely off
- 16. LAMP April 18, 2017 LDR BASE STREET LIGHT CONTROL 16 o The lamp is used as the load for the output. o In place of lamp LEDs and BULBs are used.
- 17. OUR PROGRESS April 18, 2017 LDR BASE STREET LIGHT CONTROL 17 1. Simulation using proteus:-
- 18. OUR PROGRESS April 18, 2017 LDR BASE STREET LIGHT CONTROL 18 2.Circuit design on bread board:-
- 19. April 18, 2017 LDR BASE STREET LIGHT CONTROL 19