# Circuit Playground Digital Input

## Overview

![](https://cdn-learn.adafruit.com/assets/assets/000/039/655/medium800/circuit_playground_banner_signal.png?1487872831)

In this guide we will use our Circuit Playground along with some alligator clips and a resistor to explore how we can read digital inputs.

**No soldering required!**

# Required Parts

You will need the following items.

[Circuit Playground](https://www.adafruit.com/products/3000)

![circuit_playground_cp.jpg](https://cdn-learn.adafruit.com/assets/assets/000/039/624/medium640/circuit_playground_cp.jpg?1487797637)

[Small Alligator Clip Test Lead](https://www.adafruit.com/products/1008)

![circuit_playground_gators.jpg](https://cdn-learn.adafruit.com/assets/assets/000/039/626/medium640/circuit_playground_gators.jpg?1487797704)

[10k Ohm Resistor](https://www.adafruit.com/products/2784)

![circuit_playground_resistor.jpg](https://cdn-learn.adafruit.com/assets/assets/000/039/627/medium640/circuit_playground_resistor.jpg?1487797762)

# Before Starting

If you are new to the Circuit Playground, you may want to first read these overview guides.

- [Overview](../../../../introducing-circuit-playground)
- [Lesson #0](../../../../circuit-playground-lesson-number-0)

This project will use the Arduino IDE. Make sure you have added the board support for the Circuit Playground as well as installed the Circuit Playground library. **MUST DO BOTH.** This is covered in the guides linked above.

- [Next Page](https://learn.adafruit.com/circuit-playground-digital-input/digital-signals.md)

## Featured Products

### Circuit Playground Express

[Circuit Playground Express](https://www.adafruit.com/product/3333)
 **Circuit Playground Express** is the next step towards a perfect introduction to electronics and programming. We've taken the original Circuit Playground Classic and made it even better! Not only did we pack even more sensors in, we also made it even easier to...

In Stock
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[Related Guides to the Product](https://learn.adafruit.com/products/3333/guides)
### Circuit Playground Classic

[Circuit Playground Classic](https://www.adafruit.com/product/3000)
Would you like to learn electronics, with an all-in-one board that has sensors and LEDs built in? **Circuit Playground** is here - and it's the best way to practice programming on real hardware with no soldering or sewing required!

This is the **Classic**...

In Stock
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[Related Guides to the Product](https://learn.adafruit.com/products/3000/guides)
### Small Alligator Clip Test Lead (set of 12)

[Small Alligator Clip Test Lead (set of 12)](https://www.adafruit.com/product/1008)
Connect this to that without soldering using these handy mini alligator clip test leads. 15" cables with alligator clip on each end, color coded. You get 12 pieces in 6 colors. Strong and grippy, these always come in handy! We often use these in conjunction with a multimeter so we...

Out of Stock
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[Related Guides to the Product](https://learn.adafruit.com/products/1008/guides)
### Through-Hole Resistors - 10K ohm 5% 1/4W - Pack of 25

[Through-Hole Resistors - 10K ohm 5% 1/4W - Pack of 25](https://www.adafruit.com/product/2784)
ΩMG! You're not going to be able to resist these handy resistor packs! Well, axially, they do all of the resisting for you!

This is a **25 Pack of 10K Ω Resistors.** More specifically, they are **carbon film** , through-hole...

In Stock
[Buy Now](https://www.adafruit.com/product/2784)
[Related Guides to the Product](https://learn.adafruit.com/products/2784/guides)

## Related Guides

- [Introducing Circuit Playground](https://learn.adafruit.com/introducing-circuit-playground.md)
- [Adafruit Circuit Playground Express](https://learn.adafruit.com/adafruit-circuit-playground-express.md)
- [Glue Stick Light Pipe Sculpture](https://learn.adafruit.com/glue-stick-archway.md)
- [Circuit Playground Express Laser Tag](https://learn.adafruit.com/circuit-playground-express-laser-tag.md)
- [Make It Hot or Cold](https://learn.adafruit.com/make-it-hot-or-cold.md)
- [Remote Control Tree Ornament with Circuit Playground Express](https://learn.adafruit.com/remote-control-tree-ornament-with-circuit-playground-express.md)
- [Make a Snow Globe with Circuit Playground Express & MakeCode](https://learn.adafruit.com/make-a-snowglobe-with-circuit-playground-makecode.md)
- [Circuit Playground Hourglass](https://learn.adafruit.com/circuit-playground-hourglass.md)
- [Porting an Arduino library to CircuitPython: VL6180X Distance Sensor](https://learn.adafruit.com/porting-an-arduino-library-to-circuitpython-vl6180x-distance-sensor.md)
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- [Cartoon Network and Make Code - Rose Quartz Shield Umbrella](https://learn.adafruit.com/cartoon-network-and-make-code-rose-quartz-shield-umbrella.md)
- [CPX Mystery Dreidel](https://learn.adafruit.com/cpx-mystery-dreidel.md)
- [Stumble-Bot](https://learn.adafruit.com/stumble-bot-with-circuit-playground-and-crickit.md)
- [Easy Sparkle Pocket T-Shirt](https://learn.adafruit.com/easy-sparkle-pocket-t-shirt.md)
- [Circuit Playground D6 Dice](https://learn.adafruit.com/circuit-playground-d6-dice.md)
- [Circuit Playground Express Head-Tilt Ears](https://learn.adafruit.com/circuit-playground-express-head-tilt-ears.md)
- [Stand-alone programming AVRs using CircuitPython](https://learn.adafruit.com/stand-alone-programming-avrs-using-circuitpython.md)