HackSpace - Issue 50 - January 2022

54.7 MB·English

by  HackSpace Magazine

hsmag.cc January 2022 Issue #50
VINYL RP2040
CUTTING
The best dev
boards tested
Customise your mug
Improve your builds with
artificial intelligence
DIY
LIGHT CHRISTMAS
PAINTING LIGHTS
Jan. 2022
Issue #50 £6
Take photography Control lots of LEDs
to the next level this festive season
WRAPPING 3D PRINTING PYTHON LATHES

WELCOME EDITORIAL
Editor
Ben Everard
[email protected]
Welcome to Features Editor
Andrew Gregory
[email protected]
HackSpace magazine
Sub-Editors
David Higgs, Nicola King
DESIGN
You might be familiar with the Gartner Hype Cycle. The Critical Media
basic idea is that when technologies are young, they get a criticalmedia.co.uk
Head of Design
lot of media attention, but they’re not yet mature enough to
Lee Allen
be actually useful. This inevitably leads to disappointment Designers
as the wild claims made about the technology don’t Sam Ribbits, Olivia Mitchell,
Ty Logan
miraculously come true quickly. However, after the media
Photography
attention has died down, the technology quietly matures Brian O’Halloran
without much fanfare. As time goes on, it gradually becomes CONTRIBUTORS
Jo Hinchliffe, Marc de Vinck,
more and more useful, and this time, excitement grows with Rob Miles, Andrew Lewis,
Rosie Hattersley, Nicola King,
actual usefulness.
Phil King, Didier Briand
It’s this latter stage that machine learning is now in. Ten
PUBLISHING
years ago, it was all hype and of little practical use. Now, Publishing Director
Russell Barnes
the tools and techniques have moved on to the point where
[email protected]
it’s possible for a moderately technical person, with a bit of Advertising
programming skill, to make a useful project using machine Charlie Milligan
[email protected]
learning. It’s not about to solve all the world’s problems (as
DISTRIBUTION
some of its more vocal proponents used to claim), but it can
Seymour Distribution Ltd
be a great tool for analysing data about the real world. In this 2 East Poultry Ave,
London EC1A 9PT
issue, we’re taking a look at some of our favourite projects
[phone]
that show off different aspects of machine learning. Flip to
SUBSCRIPTIONS
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Crawley, West Sussex, RH10 9PE
Got a comment, BEN EVERARD
question, or thought To subscribe
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get in touch at Subscription queries
hsmag.cc/hello PAGE 44 [email protected]
GET IN TOUCH FFRREEEE PPIICCOO
This magazine is printed on
hackspace@ WWHHEENN YYOOUU paper sourced from sustainable
raspberrypi.com SSUUBBSSCCRRIIBBEE forests. The printer operates an
environmental management system
hackspacemag which has been assessed as
conforming to ISO 14001.
hackspacemag
HackSpace magazine is published
by Raspberry Pi (Trading) Ltd.,
Maurice Wilkes Building, St. John’s
ONLINE Innovation Park, Cowley Road,
Cambridge, CB4 0DS The publisher,
hsmag.cc editor, and contributors accept
no responsibility in respect of any
omissions or errors relating to goods,
products or services referred to or
advertised. Except where otherwise
noted, content in this magazine is
licensed under a Creative Commons
Attribution-NonCommercial-
ShareAlike 3.0 Unported (CC BY-NC-
SA 3.0). ISSN: 2515-5148.
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Contents
112
SPARK LENS
06 31
06 Top Projects 32 Machine learning
Beautiful, functional builds made by real people Teach machines to think for themselves. What could go wrong?
18 Objet 3d’art 46 How I Made: Pilightpaint
Bring light to the dark months of winter Light painting in high-definition
20 Meet the Maker: Lewis Aburrow 52 Interview: Matt Stultz
Learning and sharing with DIY Machines Meet the Head of Community at Prusa Printers
26 Letters 60 Improviser’s Toolbox Wrapping paper
3D printing: overhyped or just really useful? Things to make and do with excess paper
28 Crowdfunding now
Light up your letters Tutorial
Vinyl cutting
Cover Feature
94 Customise T-shirts, mugs, and
almost anything else, with a Cricut
Add brains to your builds
60
with artificial intelligence
32
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CONTENTS
74
06
Direct from Shenzhen
Heat gun
46
Meet the Maker
Lewis Aburrow
102
108 Solder tricky components
with the power of hot air
73 FORGE 20 On the unexpected loveliness
of the maker community
74 SoM Pico gearbox
Resurrect a broken lathe with a Raspberry Pi Pico 66
80 Tutorial Parallel NeoPixels
Power 26 chains of NeoPixels in one go
82 Tutorial Sensors 101 FIELD TEST
Detect gases with a Raspberry Pi
86 Tutorial FreeCAD 102 Best of Breed
Design for building with folded metal The best development boards for RP2040
94 Tutorial Vinyl cutting 108 Direct from Shenzhen Heat gun
Clean, automatic designs with Cricut A budget solution for surface-mount soldering
98 Tutorial Festive lights 112 Review Seesaw
Custom blinkenlights for your Christmas tree Add extra features to your microcontroller
Some of the tools and techniques shown in HackSpace Magazine are dangerous unless used with skill, experience and appropriate personal protection equipment. While we attempt to guide the reader, ultimately you
are responsible for your own safety and understanding the limits of yourself and your equipment. HackSpace Magazine is intended for an adult audience and some projects may be dangerous for children. Raspberry
Pi (Trading) Ltd does not accept responsibility for any injuries, damage to equipment, or costs incurred from projects, tutorials or suggestions in HackSpace Magazine. Laws and regulations covering many of the topics
in HackSpace Magazine are different between countries, and are always subject to change. You are responsible for understanding the requirements in your jurisdiction and ensuring that you comply with them. Some
manufacturers place limits on the use of their hardware which some projects or suggestions in HackSpace Magazine may go beyond. It is your responsibility to understand the manufacturer’s limits.
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Top Projects
REGULAR
Marblevator
By Greg Zumwalt hsmag.cc/Marblevator
W e love simplicity, but we also love the whirr
and click of moving parts working exactly
as they should. That’s why this build by Greg
Zumwalt stands out: it’s just so precise.
This circus-themed marble run comprises
50 unique 3D-printed parts, many of which fit
into confined spaces, needing very precise alignment. Because of
that, Greg used the Engineering Profile in Ultimaker Cura to slice his
models, and did a dry run before he glued anything together.
Mechanical parts include a motor, power supply, 32 3×1.5mm
neodymium magnets, two 6×1.5mm magnets, and two 8mm ball
bearings. Greg’s made all the design files available, so if you feel like
a challenge, have a go yourself!
Right
Missing your ball
bearings? Watch out
for giraffes, notorious
thief of round metal
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SPARK
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Top Projects
REGULAR
Moon Phase Clock
By James Mabon hsmag.cc/MoonPhaseClock
J ames Mabon wanted a project for his new 3D
printer, and to give himself an excuse to learn
Fusion 360. So here’s what he created: a clock that,
as well as telling the time, shows you the phase of
the moon. This wasn’t just a 3D printing challenge:
astrophysics is notoriously difficult, and James made
a few simplifications to the mathematical model he used, ignoring
the way the moon wobbles on its axis, as well as a couple of
other things. Nevertheless, the gear train he’s used to show the
constantly shifting phases of the moon is astonishingly accurate,
having a deviation of less than one minute in 25 years.
Right
The 3D-printed
model of the moon
was already provided
(it’s on Thingiverse
here: hsmag.cc/
NASAMoonKit)
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SPARK
9
Top Projects
REGULAR
Tiny Mac
By C Genco hsmag.cc/MicroMac
C alifornian computer company Apple now houses
its machines in machined aluminium, but there
was a time when, like all other computer makers,
they housed their wares in a rich shade of beige.
If you miss those primitive days, you can now print
your own very small Macintosh computer on which
you can play Lemmings, surf the web, and do whatever else you
can do on a Raspberry Pi Zero W.
You’ll need – no surprise here – a Raspberry Pi Zero W, plus the
headers to attach to the GPIO pins, a power supply, and a mini
HDMI to HDMI cable (for setup). The most important component
however is the screen: this design uses a 640×480 LCD display;
if you can’t find one of these, or if the screen you use is a slightly
different size or shape, you’ll have to tweak the design of the case.
Thankfully, you can, as the maker has shared all the files.
Right
C Genco has created
two versions of this
design: one with
the SD card slot on
the side, and one
with it on the front,
where the disk drive
went on the original
machine
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