MakeCrate’s Arduino circuit library can help you get started using sensors and other components to build and code Arduino circuits.  Each topic contains circuit diagrams and code to help you learn to use a new component correctly so that you can build bigger and more complicated circuits on your own.  
Ultrasonic Sensors and Arduino

Ultrasonic Sensors and Arduino

Ready to learn how to use ultrasonic sensors and arduino? Ultrasonic sensors are devices that use high-frequency sound to measure distances.  One part of the sensor emits quick, high-pitched clocks that bounce off of objects in front of the sensor, while another part...

4-Digit 7-Segment Displays and Arduino

4-Digit 7-Segment Displays and Arduino

4-Digit 7-Segment Displays are tricky to use in circuits. These instructions will walk you through the process to get your your display corretly attached to your Arduino so you can get it coded and running. [pdf-embedder...

Soil Moisture Sensors: An Introduction

Soil Moisture Sensors: An Introduction

Watch this video and learn about variable resistance and how a soil sensor uses it to read moisture levels.   Use this diagram to learn how to wire an soil moisture sensor and use it in your projects.  Use this code and the serial monitor to take readings from...

LED Matrices with Arduino

LED Matrices with Arduino

Use LED matrices with Arduino!  Build an LED matrix circuit, and then learn how to transform code to  make letters, shapes, and messages on them.  Use this diagram to learn how to wire an LED matrix so that you can use it in your projects. Using the code below will...

LCDs and Arduino

LCDs and Arduino

Looking to use LCDs and Arduino in your projects?  Use this guide to learn how to build and code and LCD and Arduino circuit.   Use this diagram to wire your LCD and get it ready to test.   Before you can get your LCD running, you need to find it's address. ...

Keypads and Arduino

Keypads and Arduino

Want touse keypads and Arduion to create some projects?  We can help you get started.    Use this diagram to wire your keypad and get it ready to test.   Using the code below will print the buttons that you push to the serial monitor. If you don't know how...

All About Sound Sensors

All About Sound Sensors

Sounds sensors allow you to create circuits and machines that respond to sound.  In this tuorial, you'll learn how they work as well as how to build and code a circuit that uses one.  Find out how a sound sensor works in this video tutorial.  Build a simple sound...

All About Photoresistors

All About Photoresistors

Photoresistors are used to control circuits by makng them reactive to light. Find out how they work, as well as how to build a circuit that includes one and some code to run the circuit in this quick lesson!Photoresistors are designed using materials that react to...

All About Buzzers

All About Buzzers

Looking to build a project that includes some buzzers? Here's everthing you need to know about them- how they work, how to build a circuit that includes them, and how to write some code to turn them on and off. What happens inside an buzzer to create sound?  Find out...

LEDs and Arduino: An Introduction

LEDs and Arduino: An Introduction

Learn to use LEDs and Arduino with this tutorial! LEDs are used in all kinds of engineering and coding projects.  Here you can learn how they work, as well as how to build a circuit and write code to get them working.  Get started with this STEM project today! What...