Connexion
Forget Beanie Babies as McDonald’s Happy Meal toys, or U2’s new album magically appearing on everyone’s iTunes list: the collaboration of the century is here. Estefannie Explains it All answered a call from LOOK MUM NO COMPUTER (aka Sam) who was looking for a coding genius to bring his cryptocurrency-measuring musical machine to life.
Sam wanted to use the up-and-down nature of cryptocurrency value to generate voltages that would power synthesisers and generate sounds. He’s good at music, but middlingly bad at the coding side of things, and so he roped in Estefannie’s smarts to devise a solution.
Estefannie‘s plan involved a Raspberry Pi and some pulse-width modulation signals, which can be filtered down into analogue voltages.
She marked this all out on a breadboard, with ten LEDs connected to Raspberry Pi standing in for ten cryptocurrencies. The Raspberry Pi pins send voltages to the LEDs that correlate with the real-time percentage of change the cryptocurrency values experience.
In order to make the monotone output of Estefannie’s creation sound more musical, Sam needed more than one cryptocurrency to be heard at a time, and to be able to alter the chords. So he built ten analogue circuits on perf boards. These slow down the changes in the cryptocurrency values, altering the audio output. And ten separate oscillators allow each board to interact with each other. Sam explains it much better, so check out his build video.
This is a cool mash-up of a project, with each maker producing brilliant videos focusing on the separate expertise they brought to the build.
If you want to dig deep into the marathon coding session Estefannie performed to create this musical machine, check out her project video:
And if you’re interested in the analog musical side of things, check out Sam’s:
If you actually trade cryptocurrency, this would be a whimsical way to keep an eye ear on market changes. If you don’t trade cryptocurrency and you also don’t have the skills to build something like this, then you can just pretend.
Sam has produced an hour-long ‘performance’ video of the machine doing its thing. So stick it on in the background next time you’re doing busy work at your desk and pretend you’re also a crypto-trading coding artist.
The post Raspberry Pi turns cryptocurrency into music appeared first on Raspberry Pi.
Over the autumn term, we’ll be launching three brand-new, online courses on the FutureLearn platform. Wherever you are in the world, you can learn with us for free, thanks to support from Google.
The course presenters are Pi Towers residents Mark, Janina, and Eirini
The first new course is Design and Prototype Embedded Computer Systems, which will start on 28 October. In this course, you will discover the product design life cycle as you design your own embedded system!
You’ll investigate how the purpose of the system affects the design of the system, from choosing its components to the final product, and you’ll find out more about the design of an algorithm. You will also explore how embedded systems are used in the world around us. Book your place today!
What else would you expect us to call the sequel to Programming 101 and Programming 102? That’s right — we’ve made Programming 103: Saving and Structuring Data! The course will begin on 4 November, and you can reserve your place now.
Programming 103 explores how to use data across multiple runs of your program. You’ll learn how to save text and binary files, and how structuring data is necessary for programs to “understand” the data that they load. You’ll look at common types of structured files such as CSV and JSON files, as well as how you can connect to a SQL database to use it in your Python programs.
The third course, Introduction to Encryption and Cryptography, is currently in development, and therefore coming soon. In this course, you’ll learn what encryption is and how it was used in the past, and you’ll use the Caesar and Vigenère ciphers.
The Caesar cipher is a type of substitution cipher
You’ll also look at modern encryption and investigate both symmetric and asymmetric encryption schemes. The course also shows you the future of encryption, and it includes several practical encryption activities, which can be used in the classroom too.
If you’re a secondary school teacher in England, note that all of the above courses count towards your Computer Science Accelerator Programme certificate.
The very first group of teachers who earned Computer Science Accelerator Programme certificates: they got to celebrate their graduation at Google HQ in London.
What’s been your favourite online course this year? Tell us about it in the comments.
The post Your new free online training courses for the autumn term appeared first on Raspberry Pi.
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