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light up. In the “OFF” position, the circuit is broken, and the flow of electricity is stopped, turning
off the LED.

Observation

When the switch is turned ON, it allows the flow of electricity, and the LED lights up. This shows
how a complete circuit is necessary for electricity to flow.

When the switch is turned OFF, the flow of electricity is stopped, and the LED goes off. Students
observe that breaking a circuit prevents electricity from reaching
the LED, illustrating the importance of a closed loop for current
flow.

Application

Home Appliances: Buttons found in devices like fans, microwaves,
and ovens to power them on and off and to select different settings.

Sensor Integration with Alarm Systems

LED Module

An LED, or Light Emitting Diode, is a small and colorful light that can glow and brighten
things. LED lights come in many colors, and they are used in things like flashlights,
traffic signals, and even on some toys. They are cool because they last a long time and
use less energy than regular light bulbs.

LDR Module

LDR stands for Light Dependent Resistor, also known as light sensor. It is a special
kind of sensor as it can sense the light when it is bright or dark and helps in turning the
devices on or off accordingly.

21 st #Information Literacy
Program the Tinker Orbit Kit to Create Century #Creativity
Activity Skills
Sense the Light Using Sensors

Overview

Students, have you ever wondered how street lights automatically turn on when it gets dark? This
happens because of a special sensor that can sense light levels. Using an LDR (Light Dependent
Resistor) and a light module, we will build a system that reacts to the amount of light around it. This
will help you understand how electronics and sensors work together to create smart devices we see

and use every day.

Programming with Tinker Orbits Kit 59