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RasPi Magazine

RasPi Magazine No. 21

From the team behind Linux User & Developer magazine, RasPi is the essential guide to getting the most out of the Raspberry Pi credit-card sized computer. Packed with expert tutorials on how to design, build and code with the Raspberry Pi, this digital magazine will educate and inspire a new generation of coders and makers. What you’ll find in every issue: • Get hands-on with your Raspberry Pi – we show you the best way to code, build and create with this awesome educational computer. • Awesome RasPi projects in each issue – get inspired to create something amazing with projects big and small. • Our easy to follow step-by-step tutorials and designed for all abilities and age groups. • Need to know more about anything Raspberry Pi? You can chat with the team and get your questions answered.

País:
United Kingdom
Língua:
English
Editora:
Future Publishing Ltd
Periodicidade:
Back issue only
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nesta edição

1 minutos
welcome

Did you know that your Raspberry Pi is powerful enough to handle some pretty high-level audio processing? This month we’re going to show you how to code a simple polyphonic synthesiser using Python, from scratch. It’s such a worthwhile project because the lessons you’ll learn while working with buffers, manipulating the flow of data into each of them, and running the maths on the outputs, will really help you out with your audio, video and electronics projects. As well as this, we’re also playing around with a great little device for doing science experiments, and following up last issue’s guide to profiling your Python code with a tutorial on optimisation. Enjoy! Editor Get inspired Discover the RasPi community’s best projects Expert advice Got a question? Get in touch and we’ll give you a hand Easy-to-follow guides Learn…

8 minutos
code a simple synthesiser

We are going to take you through the basics of wavetable synthesis theory and use that knowledge to create a real-time synthesiser in Python. At the moment, it is controlled by the computer keyboard, but it could easily be adapted to accept a MIDI keyboard as input. The Python implementation of such a synthesiser turns out to be too slow for polyphonic sound (ie playing multiple notes at the same time) so we’ll use Cython, which compiles Python to C so that you can then compile it to native machine code to improve the performance. The end result is polyphony of three notes, so this is not intended for use as a serious synthesiser. Instead, this tutorial will enable you to become familiar with synthesis concepts in a comfortable language: Python. Once…

4 minutos
raspiviv

So, what do you keep in the vivarium? Right now I have seven poison dart frogs – they’re frogs from South America that, in the wild, excrete poison alkaloids, but in captivity, because their diet is just fruit flies, they can’t produce any poison. They’re something I’ve been interested in for quite a long time. I think I saw them first when I was in grade school at a trip to the Denver zoo, and I just thought they were the coolest animals I’d ever seen in my life. I’ve wanted to keep them since then but the opportunity never came up – they’re kinda rare – until I found a breeder on Craigslist who has an incredible collection and he breeds them to support his hobby. So right now I…

3 minutos
top android apps for your pi

Mostly, our tutorials are about completing a specific project and reaching a particular goal. However, this time we’re doing something a bit different. We are showing you some Android apps that you can use along with your Ras Pi. These apps aren’t tied to particular projects – you can use them whenever and as often as you like – but we think they can add something to your whole experience with the Pi. Some of the apps in our list are Pi- specific, while others are more general but have a Pi relevance. Chances are you might already know or use one or two, but we hope that you can discover something new from the selection on offer. If you have an Android phone or tablet and have not explored the…

8 minutos
run science experiments on the expeyes kit

ExpEYES is a relatively unheard of but very impressive hardware and software platform for science and electronics experimentation, as well as a useful electronic probing tool for makers and professionals alike. It is also open source on both the hardware and software sides, which makes it affordable and versatile. ExpEYES is billed as a science and experimentation kit but really it is much more than that – it is a fully-functioning four-channel digital oscilloscope with an impressive array of features. ExpEYES ships with a wealth of online documentation in a variety of formats (graphics, user guides, web content), including upwards of 50 suggested experiments, and the kit itself contains all of the hardware required to play around with the interesting science of electronics contained within the guide material. The aim is to…

3 minutos
faq what is papirus?

I’m guessing this is not about vintage papercraft, then? Not this time, although the PaPiRus is quite paper-like in many ways. Well, now I’m confused. So what exactly is the PaPiRus? Well, the PaPiRus is a HAT module for the Raspberry Pi that adds an ePaper display to it for you to use in your projects. Remind me again – what exactly is a HAT module? The Raspberry Pi Foundation released something called the HAT specification, which is a set of guidelines for producing Raspberry Pi add-ons that sit nice and neatly on top of the Pi itself – Hardware Attached on Top – and which also makes things much easier for their end users. So the PaPiRus is an add-on board that fits in with the Foundation’s particular specifications. “Well, the PaPiRus is a HAT…