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Students will notice that by controlling the individual red, green, and blue components of the LED,
they can create various color combinations, which can be used for mood lighting or visual effects.

Application

Ambient Lighting: RGB LEDs are used in ambient lighting
systems for homes and businesses, allowing users to adjust
the color and intensity of the lighting to create different
atmospheres.

Troubleshooting Tips

1. Check the connections to ensure they are secure and correctly inserted.

2. Verify that the RGB LED is positioned correctly and oriented properly.

3. Ensure that the switch is functioning correctly and making proper contact when toggled.
4. Check the power source to ensure it is supplying the required voltage to the circuit.

Transistors, Buzzer and Circuit Integration

Transistor BC547

A transistor is like a tiny switch that can be turned ON or OFF by a small
electrical signal.

When a small current flows into the transistor’s base, it allows a larger
current to flow between its other two terminals.

This allows the transistor to amplify or control electrical signals. Transistor BC547

Buzzer

A buzzer is like a tiny speaker that makes sound when electricity passes through it.

When a voltage is applied to the buzzer, it causes a metal disc or diaphragm inside
to vibrate.

These vibrations create sound waves, producing the buzzing sound. Buzzer

21 st #Creativity
Century
Activity Building a Smart System to Skills #Information Literacy
Monitor Water Levels with Visual Indicators

Overview

In this activity, students will build a smart water level monitoring system to detect water levels and
trigger an alert using a buzzer and LED. This project demonstrates how electronic components can
be used to monitor and manage water levels effectively.

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