Tag Archive for Raspberry Pi Press

Custom PC, Issue 194

Custom PC Issue 194My regular Hobby Tech feature provided two opportunities to break out the thermal camera, thanks to a detailed analysis of a range of cooling products for the Raspberry Pi 4 and a review of the Libre Computer Project’s La Frite single-board computer – and there was even time to take a look at Brian Dear’s exhaustive title The Friendly Orange Glow: The Untold Story of the Rise of Cyberculture.

First, La Frite. Funded, as with all Libre Computer Project boards, via crowdfunding, the compact single-board computer is designed to compete with the like of the Raspberry Pi. It certainly has its selling points: there’s a mounting point on the underside for an eMMC storage module, though it uses proprietary mounting holes; there’s a clever midship-mounted Ethernet port to reduce the overall height; and it even comes with the option of a clever two-piece aluminium case that doubles as a heatsink. Sadly, the board’s performance isn’t there, its software support struggles, and despite the name of the organisation its openness is limited to targeting mainstream Linux kernels; the board itself is a proprietary design.

Moving on to the topic of the Raspberry Pi 4, there’s no secret now that the new high-performance processor at its heart runs a little warm. For my analysis of the issue and a look at some potential solutions, a benchmarking workload was executed while temperature and clockspeed were measured and charted – demonstrating handily the loss of performance you get when the system-on-chip begins to heat up.

These data are joined by the same workload while the Raspberry Pi 4 is enjoying the benefits of a range of third-party cooling products: the Pimoroni Heatsink and Fan Shim options, the former running in passive-only and fan-assisted modes and the latter in always-on and software-controlled modes, along with the 52Pi Ice Tower heatsink and fan assembly as supplied by Seeed Studio and running in 5V, 3V3, and wholly passive modes. The temperatures across the run are then charted, while thermal imagery provides a visual insight into how the whole board heats under passive and active cooling.

Finally, The Friendly Orange Glow is a book I’d heartily recommend to anyone interested in the history of a surprising range of modern technologies – from flat-panel plasma displays and multiplayer gaming to Microsoft’s FreeCell. Charting the rise and fall of PLATO, a computer-assisted learning platform now largely forgotten by history, the book is about more than just technology: as its subtitle, The Untold History of the Rise of Cyberculture, suggests, PLATO and those who built and used it were responsible for cultural movements that wouldn’t be repeated elsewhere in the world for decades.

You can pick up the latest issue of Custom PC Magazine at your nearest newsagent, supermarket, or online at the Raspberry Pi Press Store, or grab it in digital form via the usual distribution services.

Custom PC, Issue 193

Custom PC Issue 193My Hobby Tech column focuses this month on the Raspberry Pi 4, the amazingly inexpensive M5Stick-C microcontroller platform, and Zach Barth’s game design retrospective Zach-Like.

The column opens with the Raspberry Pi 4 review, a two-page look at the layout, features, functionality, and performance of the latest single-board computer from the Raspberry Pi Foundation. As always, there’s plenty of photography – including thermal imagery, using an in-house process I developed to get the most detail possible by combining visible light and infrared photography into a single print-resolution image.

My look at the M5Stick-C, part of the M5Stack family of products, needs no such clever photography – though there is a shot of the device on my wrist, thanks to a bundled watch strap mount. Designed around the low-cost ESP32 microcontroller the M5Stick-C includes buttons, a full-colour screen, Wi-Fi and Bluetooth connectivity, LEDs, a range of sensors, a built-in battery chargeable over USB Type-C, and the aforementioned watch strap plus a wall-mount bracket, LEGO-compatible mounting bracket, and even a built-in magnet – and all for under £10 excluding VAT. It may not be perfect, but it’s certainly cheap enough.

Cheaper, though, is Zach-Like, a collection of game design documents charting the early days of Zach Barth and his company Zachtronics. Initially available as a limited-run print edition on crowdfunding site Kickstarter, Zach-Like is now available as a free electronic download on Steam in PDF format – and comes with a huge selection of bonus content, including playable versions of several unreleased games and prototypes. At £10, Zach-Like would be a bargain; for free, it’s astonishing.

You’ll find the full column, and a lot more, in Custom PC Issue 193 at your nearest supermarket, newsagent, or on any one of a selection of digital distribution platforms.

Custom PC, Issue 192

Custom PC Issue 192This month’s Hobby Tech kicks off with a look at the Zepsch PocketStar – by far the smallest Arduino-compatible games console I’ve seen – and the Pimoroni Keybow, before reviewing Felipe Pepe’s The CRPG Book in digital form.

The pages of my Hobby Tech column are no stranger to Arduino-compatible handheld consoles: over the years I’ve reviewed the Gamebuino and its MAKERbuino spin-off, the Creoqode 2048, the Arduboy – then all four at once in a head-to-head group test – and most recently the Gamebuino Meta. Of these, the Arduboy was the smallest with a footprint matching a credit card and a thickness of around three cards stacked.

The PocketStar, a crowdfunded creation from Zepsch, has it beaten. Although thicker than the Arduboy, the Game Boy-inspired design has a tiny 50x30mm footprint, despite packing a colour screen and haptic feedback motor. What it doesn’t include, sadly, is a speaker – though it was originally planned, and the mounting point is still present – but it at least includes the ability to switch between games on the fly, something the Arduboy sadly lacks.

The Pimoroni Keybow, by contrast, is a very different beast. A no-solder DIY kit, the Keybow is a nine-button programmable keypad with a difference: rather than using a Teensy, Arduino, or other microcontroller, it uses a Raspberry Pi Zero WH. The reason why isn’t really adequately explained in the product briefing: it connects to the host machine via USB rather than Bluetooth, and makes no use of the Zero WH’s Wi-Fi connectivity either – though third-party firmware is available to vastly expand its functionality. Despite some bugs in the official firmware and the aforementioned surprising lack of wireless connectivity – switching to the Zero H, which does not include a radio, would shave a fiver off the retail price – it’s certainly an interesting desk accessory with plenty of flexibility.

The CRPG Book, published by Bitmap Books, doesn’t have author Felipe Pepe’s name on the cover. There’s a reason for that: it’s a collaborative effort, the physical incarnation of a four-year effort from 119 authors to document the computer role-playing game genre in as much detail as possible – going all the way back to the PLATO system and its infamous ‘friendly orange glow.’ The result is an exhaustive tome, brought to life with full-colour printing between its hardback covers – though the review is based on a digital copy, the physical version having been rejected by Bitmap Books’ quality control post-printing and sent back to the factory for a re-do with the first of the reprints due to land towards the end of the month.

While The CRPG Book is far from perfect – there are a few issues with typography and grammar, increasing in frequency as you work your way towards the back of the book – it’s pretty close to it, and made even more pleasing by the fact that the £29.99 print edition is joined by a free, Creative Commons-licensed download available from the official website. Sales of the print edition, meanwhile, have raised £12,475 in author royalties for Felipe Pepe – royalties which he has donated in full to Vocação, a not-for-profit Brazilian organisation aimed at getting children and teenagers in poor communities access to quality education.

Custom PC Magazine Issue 192 is available now at all good newsagents, supermarkets, and via the Raspberry Pi Press store. Digital outlets will update later today.

The MagPi, Issue 83

The MagPi Issue 83This week saw the release of the Raspberry Pi 4, first in a new generation of single-board computers from the not-for-profit Raspberry Pi Foundation. As is usual for the launches, I was approached by The MagPi Magazine – the Foundation’s official publication – to prepare coverage for the launch, including interviews, imagery, and a wealth of benchmarks.

My coverage for the magazine, spread across a whopping 12 pages, begins with a high-resolution hero shot of the board with macro-image call-outs for its key features and components – including the new USB Type-C power connector, BCM2711B0 system-on-chip, and shiny dual-micro-HDMI video outputs capable of driving high-resolution 4K displays.

Next, there’s an interview with Foundation co-founder Eben Upton covering everything from the reason the board is available now when a 2020 launch had previously been suggested, how it can potentially replace a desktop PC in a range of environments, backwards compatibility with the existing Raspberry Pi ecosystem, and a hidden Easter Egg on the PCB – only accessible to those brave or foolhardy enough to unsolder the USB connector.

The benchmarking section, spread across four pages, marks a departure from previous launches: this time around I pulled the focus away from synthetic benchmarks, though the classic Linpack still makes an appearance if only to demonstrate how the Arm processors’ NEON extensions can dramatically improve performance, in favour of a variety of real-world workloads: image editing with the GIMP, file compression with bzip2 and lbzip2, browser performance in Chromium, and gaming performance with OpenArena, alongside USB, Ethernet, and Wi-Fi throughputs. In all cases, the workloads are entirely reproducible: all packages used for the real-world workloads are available at launch in the Raspbian Buster software repositories. If four pages isn’t enough, additional benchmarks are available on my Medium post.

As usual, the benchmarking also includes a thermal analysis: images of the Raspberry Pi 4 and its immediate predecessor the Raspberry Pi 3 Model B+ were taken after a ten-minute CPU-heavy workload using a Flir thermal imaging camera, the data processed to a fixed temperature scale of 22-80°C to avoid noise from ambient surfaces, then overlaid on an edge-enhanced high-resolution visible-light image of their respective boards using a high-contrast rainbow colour palette. These images represent a fair amount of work, but there’s no better way to see both how hot the Pis get under continuous load and which components are responsible for that heat – not to mention how effective the design is at bleeding the heat off through the PCB, something with which the older Raspberry Pi models with plastic-encased chips have struggled.

Finally, the piece closes with a two-page interview with Simon Long on the new Raspbian ‘Buster’ operating system – launching ahead of the upstream Debian 10 ‘Buster’ release, interestingly – and its revised, flatter user interface. While much of the under-the-hood work for Buster was to get it ready for the Raspberry Pi 4 – previous Raspbian releases won’t work on the new board – it’s also available for older Raspberry Pi models, and comes with some convincing reasons to upgrade along with a handful of software compatibility issues that offer a reason to hang fire.

As always, The MagPi Issue 83 is available to buy in print format from all good newsagents, supermarkets, and book sellers; a free digital copy, released under the Creative Commons Attribution-ShareAlike-NoCommercial licence, is also available from the official website.

The Official Raspberry Pi Beginner’s Guide, 2nd Edition

The Official Raspberry Pi Beginner's Guide, 2nd EditionWhile today’s big news is the launch of the Raspberry Pi 4 single-board computer – which I have treated to a wealth of benchmarks over on Medium – it comes with a supporting product release: the second edition of the popular Official Raspberry Pi Beginner’s Guide, updated for the new hardware.

Inside the book, which is being made available for purchase in a print edition and for free download and redistribution under the Creative Commons Attribution-ShareAlike-NoCommercial licence, the content has been overhauled and updated for the Raspberry Pi 4 and latest Raspbian ‘Buster’ operating system. From the two HDMI ports to the new USB Type-C power connector, all imagery and instructions are bang up-to-date for today’s new hardware release.

The Official Raspberry Pi Beginner’s Guide 2nd Edition is also being bundled with the Raspberry Pi 4 as part of the Raspberry Pi Foundation’s official starter pack: those opting to buy their Pi that way will receive the Raspberry Pi 4, microSD with NOOBS and Raspbian ‘Buster’ pre-loaded, power supply, case, keyboard, and mouse, plus a printed copy of the book to help get them started.

As with the first edition, there’s more to the book than just plugging it in and clicking around the Raspbian desktop: you’ll find step-by-step instructions for programming in Scratch and Python, hardware projects for the Raspberry Pi’s GPIO port, and instructions and examples which use the Sense HAT and Camera Module accessories.

The book is available now in print from all good bookshops and Raspberry Pi resellers, in the Raspberry Pi Store in Cambridge, or can be downloaded for free under the Creative Commons licence on the official Raspberry Pi website.

Custom PC, Issue 191

Custom PC Issue 191This month’s Hobby Tech column takes a look at Nvdia’s first-ever entry into the maker market with the Jetson Nano, guides the reader through assisting the Internet Archive with its Sisyphean task, and takes a look at the Xiaomi Wowstick cordless screwdriver.

First, Nvidia’s offering. While the original Jetson TK1 single-board computer was sold through the since-departed high-street electronics outlet Maplin in the UK, its near-£200 price tag meant it wasn’t of much interest to the pocket-money shopper. Its successors in the Jetson family have been successively more expensive, culminating in the £1,199 Nvidia Jetson AGX Xavier reviewed last month. The Jetson Nano, by contrast, is just £95 – £101.50 if you include shipping – and is specifically aimed at makers and tinkerers.

The board uses a system-on-module (SOM) on carrier design, dominated by a massive heatsink. Although it’s perfectly possible to view the device as a souped-up and considerably more expensive Raspberry Pi, general-purpose computing isn’t Nvidia’s primary market: instead, it’s aiming to bring a new generation of developers into the CUDA GPU-accelerated computing ecosystem by using the Jetson Nano as a jumping-off point for deep learning and machine intelligence projects, including its own Jetbot autonomous robot platform.

The guide, meanwhile, walks the reader through using almost any PC to assist the Internet Archive with its goal of storing all the world’s information for immediate retrieval. Written as I was firing up a Warrior – the name given by the Archive Team to its distributed data capture systems – to assist with the archiving of the last bits of Google+ before its closure, the step-by-step instructions will let anyone contribute to the not-for-profit effort.

Finally, the Wowstick comes from a company better known in the UK for its cut-price smartphones: Xiaomi. Designed, as with much of the company’s output, to give a premium feel, the USB-rechargeable electric screwdriver is aimed at fine electronics work rather than flat-pack assembly – and does a surprisingly good job of it. Only limited torque for locked-down or larger screws and a terrible case whose tiny magnets are improperly attached let the bundle down.

For the full run-down on all this and more you can pick up Custom PC Issue 191 from your nearest newsagent or supermarket, or snag a digital copy from Zinio or similar services. Alternatively, a new subscription offer will get you the next three issues for just £5 – renewing at £25 every six issues if you don’t cancel beforehand.

Custom PC, Issue 190

Custom PC Issue 190My Hobby Tech column this month, wrapped in Custom PC’s newly-redesigned layout, takes a look at a powerful yet low-power machine likely out of the reach of most hobbyists along with the mind-bending 90s web simulator Hypnospace Outlaw and the book Robotics with Raspberry Pi by Matt Timmons-Brown.

First, the headline act: Nvidia’s Jetson AGX Xavier is its flagship entry in the Jetson range of Arm-based embedded computers, which launched with the Jetson TK1 I reviewed way back in Issue 133, and comes with a price tag to match: £1,199, dropping to £819 with educational discount. At that price, it’s a device aimed at professional developers more than hobbyists – but it provides a hint as to what to expect from the far more affordable and hobbyist-focused Jetson Nano, a full review of which will appear in next month’s column.

Hypnospace Outlaw, meanwhile, is Jay Tholen’s attempt at marrying what is effectively a 90s web simulator with a sci-fi plot involving headsets which let you browse while you sleep. Crowdfunded via Kickstarter, the game isn’t quite what was originally promised – but, frankly, that’s no bad thing: what has been delivered is impressively immersive and likely to thrill anyone who was around during the heyday of Geocities and Angelfire.

Finally, Robotics with Raspberry Pi is the first full book from self-styled “Raspberry Pi Guy” Matt Timmons-Brown. Designed with a very friendly hands-on approach in mind, the book walks the reader through the proces sof building a robot with each chapter adding new functionality: line following, Bluetooth remote control, user-addressable LEDs, a speaker, and even machine vision via the Raspberry Pi Camera Module. While a little muddled in places, it’s one of the better tomes on the subject – and one that avoids the usual pitfall of being little more than an elongated instruction manual for a single off-the-shelf robot kit.

Custom PC Issue 190 is available in all good newsagents and supermarkets now, and will shortly land on digital distribution platforms.

Custom PC, Issue 189

Custom PC Issue 189This month, my regular Hobby Tech column opens with a look at a RISC-V based not-quite-off-the-shelf personal computer build by AB Open, walks readers through building a weather monitor powered by a Raspberry Pi and a Pimoroni Unicorn HAT, and marvels at the excesses of the computer retail scene in the 1970s and 1980s via David Pleasance’s Commodore: The Inside Story.

First, the PC. The majority of PCs on desks around the world today are based on processors which use the x86 architecture or its 64-bit equivalent; a small handful are based on similar Arm chips to the ones you might find in your smartphone; and an even smaller number are powered by things like Zilog Z80s, MOS 6502s, and Motorola 68000s belonging to people who just don’t like to throw away a perfectly good decades-old system. The system built by AB Open recently, though, is different: it’s based on RISC-V, an open instruction set architecture (ISA) for which anyone can – given time, money, and a fair smattering of expertise – build a chip.

“It might be some time before there’s an off-the-shelf chip that can compete with x86 on raw performance and traditional benchmarks,” AB Open’s Andrew Back, who for full disclosure is a client of mine, admits, “but the open nature of the ISA, and the ecosystem developing around it, is driving a renaissance in novel computer architectures.” By way of proof: a fully-functional Linux-based desktop PC, built in a custom-designed laser-cut chassis, created using the SiFive HiFive Unleashed development board and Microsemi expansion board.

From a PC you can browse the web on to one which flashes a few lights: the Raspberry Pi weather monitor is a remix of a project I published in Issue 153, to use a Pimoroni Unicorn HAT LED matrix to graph energy usage in my home. This time, the same hardware is repurposed to show animated weather icons based on data downloaded from OpenWeatherMap – and, despite the low resolution of the LED matrix, it works an absolute treat.

Finally, Commodore: The Inside Story sounds like it should be an exhaustive history of the company behind one of the world’s biggest-selling home computers. It isn’t. Instead, it’s a two-part affair: the first is a series of personally recollections, presented in a very similar fashion to the stories you might hear if you took author David Pleasance to the pub and asked him about his time working in Commodore’s sales and marketing division; the second is a collection of guest chapters, and as fun as it is reading about orgies in Consumer Electronics Show hotels and drink-driving incidents the second half is, for me, the better half.

All this, and a raft more, can be found at your nearest newsagent or supermarket; the electronic version, meanwhile, is enjoying a brief holiday while background administration relating to its recent switch of publishers takes place.

The MagPi, Issue 79

The MagPi Issue 79In this month’s issue of The MagPi Magazine you’ll find my review of the Argon One, a clever case for the Raspberry Pi that if creator Argon Forty’s name is anything to go by will be followed up by 39 successive designs.

Raspberry Pi cases are ten a penny, but the crowdfunded Argon One stands out for one very heavy reason: the majority of the case, bar a plastic base, is made from a single piece of aluminium. It gives the case heft, but serves a real purpose too: the Raspberry Pi’s system-on-chip (SoC) is connected to the body of the case via a pillar of aluminium – turning the entire case into a giant heatsink.

It’s a great idea, and definitely works, but means the case has restricted compatibility: only the Rasbperry Pi 3 Model B and Model B+ will fit, with other models having their SoCs in a different position. If your Pi does fit, you’ll find the Argon One works a charm – though a built-in fan appears to make little practical difference to temperature levels.

The only real fly in the ointment, though, is that a daughterboard which provides a smart power button on the rear and power for the fan – joined by a second that moves the analogue AV and HDMI ports to the rear with the others – causes enough voltage drop to trigger ‘undervolt’ warnings and throttling on most power supplies. Only Argon Forty’s own 5.25V/3A supply, or an equivalent, avoids this – information that came too late for backers of the original Kickstarter campaign.

The full review, and a lot more beside, is available at your nearest newsagent, supermarket, or for free download under a Creative Commons licence from the official website.

HackSpace Magazine, Issue 16

HackSpace Magazine Issue 16This month’s HackSpace Magazine includes a pair of my reviews, the first looking at a computer that’s also a ruler – because that’s not only a thing but the second thing of its kind to come from the same designer – and a new set of charitable Top Trumps-style collectable cards.

First, the ruler-computer. Designed by Brads Projects, the Digirule2 is – as the name suggests – a second-generation design of a compact microcomputer which is also a functional ruler. Printed onto a single circuit board and built around a PIC32 microcontroller, the Digirule2 is inspired by the classic MITS Altair 8800: its memory is displayed on a series of LEDs, and is programmed one bit at a time using push-button switches.

Where the Digirule improves on the Altair, aside from being considerably more affordable and not taking up a huge chunk of your desk, is in having memory slots for saving and loading programmes. These slots come pre-loaded with demonstrations ranging from simple reaction games to a neat persistence-of-vision hack, while the edges of the board are printed with measurements – in binary, naturally – in both centimetres and inches.

The cards, meanwhile, are something a little less technical but no less geeky. Designed by 8bitkick and sold by the Centre for Computing History to fund its restoration and preservation works, the Games Consoles Collectable Cards partner high-quality colour images of classic videogame consoles with statistics that can be compared for a nerdy game of Top Trumps. They also partner well with the Home Computers Collectable Cards, an earlier release now repackaged to match, though sadly the two decks use different statistics and thus can’t be combined into a single mega-deck.

You can read both reviews, and a lot more beside, by picking up a copy of HackSpace Magazine Issue 16 from your nearest newsagent or by downloading a copy for free under a Creative Commons licence from the official website.