Adafruit will not be shipping orders Martin Luther King Jr. Day, Monday January 21, 2019. Any expedited orders placed after 11am ET Friday January 18 will go out Tuesday January 22.
0

littlebits Projects: 8-bit Jukebox

This is part of an on-going series of posts about littleBits projects. littleBits is available in the Adafruit store – Starter Kit, Extended Kit, Deluxe Kit, Synth Kit, Arduino Module, and Arduino Starter Bundle.

The 8-bit Jukebox is a chiptune music box powered by littleBits’ new Arduino module. The module is programmed with 4 different songs that playback with a retro, video-game-styled 8-bit sound.

 

large_filled_JukeboxBadge__2905

How it Works

To select which song you would like to play, just insert one of the 4 song cartridges into a slot on top of the box. Embedded in each cartridge is a light filter with a different opacity. Inserting the cartridge triggers an LED to shine light through the filter and onto a light sensor. The Arduino reads the light value from the light sensor and determines which song cartridge was inserted.

The Circuit

The left side of the diagram shows the song cartridge card reader, and on the right, are the audio controls and the speaker. The envelope and delay knobs can be adjusted change how the music sounds.

Jukebox_circuit_diagram

Build it!

The housing for the jukebox was made with laser cut cherry wood and MDF. Find the template files on the littleBits project page.

For the song cards, we experimented with translucent materials in our shop, including regular printer paper and the silver anti-static bags that our modules ship in. The important part was to make sure that each card had a different level of translucency.

The Arduino Sketch

Check out the sketch here. The code is programmed to play 4 different songs that correspond to four different analog input values (from the light sensor). To create the songs, this sketch uses the pitches.h library. The individual notes for each song are stored in an array called melody. The durations for each note (i.e. quarter note, half note, etc…) are stored in an array called noteDurations. A value of 8 produces an eighth note, a value of 4 produces a quarter note, and so on.  Interested in translating sheet music into values like we did in sketch? Check out this great tutorial from GarageLab.

Jukebox_layout

 


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 9,700+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

What do you want from CircuitPython in 2019?

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — A field guide to designing your PCBs, learned the hard way

Wearables — A glowing start point

Electronics — Current limiting!

Biohacking — A Gene to Predict Modafinil Response

Python for Microcontrollers — Python snakes its way on the SparkFun SAMD21 Mini, Hackaday.io, 10k thanks, and Tim’s magazine #Python #Adafruit #CircuitPython @circuitpython @micropython @ThePSF @Adafruit

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.