Arduino for Beginners - 2022 Complete Course - Activity 19 - Power On LEDs if It's Getting Too Dark

This video tutorial explores the use of a photoresistor sensor to create an automatic light system. The challenge involves two tasks with LEDs: one using a threshold to power an LED on pin 12 when it's dark, and another using analog control on pin 10 to adjust LED brightness inversely proportional to light levels. The tutorial provides a practical application of photoresistors in controlling LED behavior based on ambient light, offering two methods for automatic lighting solutions.

What is the primary task involving the photoresistor and LED in the initial challenge?

• To generate sound based on light

• To measure temperature changes

• To control an LED based on light intensity

• To power a motor when it's dark

What happens to the LED on pin 12 when the photoresistor value is below the threshold?

• The LED changes color

• The LED turns off

• The LED turns on

• The LED blinks

How is the LED on pin 10 controlled in the automatic light system?

• By using analog write

• By using a timer

• By using digital write

• By using a switch

What is the relationship between the photoresistor value and the LED brightness on pin 10?

• Directly proportional

• Exponentially proportional

• Inversely proportional

• Unrelated

What is the next step after learning about the two methods for creating an automatic light system?

• Writing a report

• Testing with different sensors

• Watching the solution in the next lesson

• Building a new circuit