By the end of this module, you will be able to:

- measure distance using ultrasonic sensor
- measure light level with an LDR
- measure temperature using LM35
- use conditional statements to combine inputs and outputs into a system

Think about all those smart gadgets around you, from self-parking cars to security systems that beep when someone gets too close. Imagine you could create that kind of smart gadgets yourself. You could build a sensor for a smart backpack that beeps when you're too close to someone else, or a light sensor for smart streetlights that turn on when it gets dark.

This Plant Monitor is an example of a project that uses sensors to measure moisture, brightness, and more.

Plant Monitoring System-2.jpg

The system includes:

Can you identify the sensors in this system?

Soil moisture sensor
Humidity sensor
LDR light intensity sensor

Get started with sensors

Learn how to use the speakers, lights, and sensors in your project:

measure distance with an ultrasonic sensor
determine brightness with a light-dependent resistor (LDR)
measure temperature using LM35

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Explore more projects

Here are more projects you can try out using the sensors you learned in this module.

Explore More