Page 43 - Robo_Genius_V1.0_flipbook_C5

Application

A cooling fan in a computer system is used to
cool down the computer. It has blades that spin
when the system is turned on, creating airflow

and cooling the system.

Working with LDR (Light Dependent Resistor)

An LDR is a special kind of resistor called

a photoresistor. “Photo” means light, so a
photoresistor is a resistor that responds to light.

• When it is dark, the LDR has high resistance,
which means it doesn’t let much electric current pass through.

• When its light, the LDR has low resistance, which means it lets more electric

current pass through.

21 st #Technology Literacy
Century
Activity Sunset Indicator Circuit Using Skills
Smart Circuit Kit

Step 1 Take out all the components from the smart circuit kit.

1. LED 2. ADJ Module 3. LDR

4. Battery 5. Magnetic Board 6. USB Cable

7. Battery OTG Socket

LED ADJ Module LDR

Battery USB Cable Battery OTG Socket

Understanding Circuits and Electronics 41