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Circuit Operation

When the circuit is powered on, the 7805 IC regulates the voltage
from the 9V battery to a stable +5V output, powering the LED and
causing it to glow.

Concept

Basic Concepts of Electricity: Understanding electric current,
voltage, and resistance.

Simple Circuits: Learning to create simple circuits using a
breadboard.
Use of Breadboards: Learning how to assemble and connect components on a breadboard.

Ohm’s Law: Calculating voltage, current, and resistance (V = IR) as part of understanding how
circuits function.

Hands-on Skills: Students gain practical experience in assembling circuits and troubleshooting
issues.

Observations

In the “Glow Your LED” activity using a breadboard, students can observe that when they connect
the LED correctly with a power source and resistor, it lights up. They will notice how the longer leg
(anode) of the LED connects to the positive side, while the shorter leg (cathode) connects to the
negative side. If the LED doesn’t light up, checking the connections, orientation, and resistor value
will help troubleshoot the circuit. This hands-on experience reinforces concepts of electrical circuits
and component functions!

Applications

Indicator Lights: LEDs are commonly used as indicator lights in electronic
devices and appliances as indicators, such as power on/off, battery
charging, etc.
Decorative Lighting: LED glow circuits are widely used in decorative
lights, such as for Diwali decorations, architectural lighting, and
fancy lights at homes, restaurants, and entertainment venues.

Troubleshooting Tips

1. Ensure that the battery voltage is more than 6 volts.
2. Ensure that the wires of the battery cap are properly inserted into the breadboard. The red wire
should be inserted into the first row, and the black wire into the second row of the breadboard.

3. Ensure that there are no loose connections.

18 RoboGenius (V1.0)-VII