LED Intensity Controlled with Resistance(STEAM Education)

Project : 13

LED Intensity Controlled with Resistance

 

Project Aim:

The aim of this project is to understand how resistance affects the flow of current in a circuit and to learn how to control the intensity of an LED by varying resistance.

 

Components Used:

1.     Power Supply (or Battery) 9V

2.     Resistors of 100Ω, 220Ω, 1K, 2.2K, 4.7K, 10K

3.     LEDs

4.     Connecting Wires

 

   

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Circuit Diagram:

 

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Connection Procedure:

For the first circuit,

Step 1: connect the positive terminal of the power supply (Pin 62) to one end of resistor 100Ω (R1, Pin 1).

Step 2: Connect the other end of resistor 100Ω (R1, Pin 2) to the Anode (+Ve) of the LED (Pin 43).

Step 3: Connect the Cathode (-Ve) of the LED (Pin 44) to the negative terminal of the power supply (pin 59).

 

For the second circuit,

Step 4: connect the positive terminal of the power supply (Pin 63) to one end of resistor 220Ω (R2, Pin 3).

Step 5: Connect the other end of resistor 220Ω (R2, Pin 4) to the Anode (+Ve) of the LED (Pin 45).

Step 6: Connect the Cathode (-Ve) of the LED (Pin 46) to the negative terminal of the power supply (pin 60).

 

For the third circuit,

Step 7: connect the positive terminal of the power supply (Pin 64) to one end of resistor 1K (R3, Pin 5).

Step 8: Connect the other end of resistor 1K (R3, Pin 6) to the Anode (+Ve) of the LED (Pin 47).

Step 9: Connect the Cathode (-Ve) of the LED (Pin 48) to the negative terminal of the power supply (pin 61).

 

Step 10: Now observing the circuit diagrams we can find LEDs glowing at different Intensity.

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Explanation:

This project aims to demonstrate the concept of resistance in a circuit and its effect on current flow. By connecting different types of resistances in series which controls the intensity of the LED as shown in diagram according to their numbers, we create obstruction that regulate the flow of current. As resistance increases, the current flow decreases, and vice versa. Consequently, by adjusting the resistances, we can effectively control the intensity of the LED, showcasing the practical application of resistance in electronics.