Make - Volume 37

116 Pages·2015·23.68 MB·English

M
a 50+ PROJECTS
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: V
o From Woodworking to Wi-Fi
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e 3 SPECIAL SECTION: EYE IN THE SKY
7
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IS Now 6 times
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U
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Autonomous
Flight Controller
GPS
$40
Wooden
Frame
Speed
Controller
HD
Motorized
Video
Gimbal
HOMEGROWN
DRONES!
FUN • PRACTICAL • EASIER THAN EVER
makezine.com
Build “Drawdio,” a simple electronic
sound synthesizer mounted on a pencil
Designed by Jay Silver, then a student in the Life- and 7. Since the contacts are arranged to put the
long Kindergarten group at the MIT Media Lab, the user’s body into the resistive loop, the frequency
Drawdio circuit plays a musical tone with a frequen- output by the 555 naturally varies depending on
cy that varies based on the resistance between two what she or he is touching. The transistor amplifies
points. The wire wrapped around the pencil handle those pulses, which emerge from the speaker as
is one point, and the pencil lead itself is another. audible sound.
When you hold Drawdio in your hand, your body
—Sean Michael Ragan, MAKE Technical Editor;
becomes part of the resistive loop, and you can do
Michael Colombo, MAKE Online Contributor
all kinds of fun tricks, like draw yourself a piano and
play a little tune!
The Drawdio circuit is based on the classic 555
timer chip. To save space on batteries, we’re using
a more modern low-power version of the 555 that
will run on 3 volts, but otherwise it behaves just like
a standard 555. Wired like this, the 555 operates in
so-called astable mode, outputting a continuous
stream of pulses from pin 3. The frequency of those
pulses can be controlled by changing the values of
the resistors and capacitors connected to pins 2
ADVERTORIAL
Learn to build an analog sound synthesizer that
piggybacks on top of a pencil!
Parts list:
Electrical tape 
1. Test-fit the components on the (cid:51)erfboard 
perfboard.
(cid:19).(cid:20)(cid:119)(cid:41) ceramic disk capacitor
(cid:37)attery, AAA (cid:11)2(cid:12) 
TLC555/TLC555CP
TLC555(cid:18)TLC555C(cid:51) LinCMOS timer (cid:11)(cid:27)-pin DI(cid:51)(cid:12) 
LinCMOS timer
Thumbtack, (cid:461)at, metal
(8-pin DIP)
(cid:51)(cid:49)(cid:51) amplifying transistor 
(cid:37)attery holder, 2 (cid:91) AAA 
Resistors (cid:20)(cid:18)(cid:23)W - (cid:20)(cid:19)M, 27(cid:19)K, (cid:20)(cid:19)K, (cid:20)(cid:19) (cid:339) 
2. Cut and strip the grip and graphite
leads. (cid:27) (cid:339) mini speaker 
Double-sided foam tape 
2 × “AAA” battery
(cid:43)ookup wire, 22AW(cid:42) solid
holder
(cid:20)(cid:19)(cid:19)(cid:119)(cid:41) 35(cid:57) 2(cid:19)(cid:8) radial-lead electrolytic capacitor
(cid:51)encil, (cid:461)at with soft lead
5(cid:25)(cid:19)p(cid:41) disc capacitor
3. Solder the components and attach
PNP amplifying
Tools checklist:
the speaker to the perfboard.
transistor
(cid:51)liers, mini long-nose
Wire stripper (cid:18) cutter
Soldering iron and solder
Scissors
(cid:56)tility knife
Straightedge
40 watt pencil iron
4. Attach the perfboard and battery (cid:42)reen (cid:461)orist’s foam (cid:11)optional(cid:12)
holder to the pencil.

For complete instructions and details on this project visit:
radioshackdiy.com/drawdio
5. Secure the graphite lead to the top
with a thumbtack.
TM
6. Secure the grip lead with electrical tape.
CONTENTS
COLUMNS
Welcome 06
Reader Input 08
All Art is Made by Makers 10
Hackschooling 11
Made on Earth 12
FEATURES
Shifting Gears 20
A student-built, world-class race car.
FLIGHT OF
Radically Cheap 24
THE DRONES
Building machine tools from car parts to save the world.
Here's looking at you:
Inkjet Maniac 28 new platforms for
Hacking printers for the sake of art. aerial imaging.
32
DRONES A D
Flight of the Drones 32
The multicopter revolution is coming. Are you ready?
L C
Anatomy of a Drone 34 B
Find your way around a modern multirotor UAV. B J I H G F
Aerial Videography 36 Q
Make fantastic videos from your multicopter or drone.
World of Drones 40
Drones are already hard at work, from the pyramids to the polar ice. K P O
Quadcopter Photogrammetry 42 E P
R/C aircraft helping restore historic buildings in Cuba.
N M A
HandyCopter UAV 44
Build a cheap quadrotor airframe with video and autonomous flight.
Drone Buyer's Guide 49 Q
Take a peek at the new wave of drones available to buy now. L
FPV Fundamentals 50
C
Pilot your drone by seeing what it sees, with first person view. 50 66
x4 x4 J H K Q I
Custom-Crafted Multicopters 52
Homegrown drones — you can build your own!
No Man's Land 53
The legal gray area facing drones and their pilots.
Quad Squad 54
These expert drone pilots are making quadcopters even cooler.
SKILL BUILDERS
Finding Your Way with GPS 58
Precision location data, via satellite. 70 74 90
Calling Out Around the World 62
Communicate with your projects anywhere they can see the sky.
Sensor Smörgåsbord 64 123: Glider Launcher 83 GPS Cat Tracker 96
All-in-one sensing devices are cheaper & easier to use than ever. An inexpensive launcher that yields impressive flights. Find out exactly where kitty wanders all day.
The Amateur Scientist 84 CNC Air Raid Siren 97
PROJECTS Track heat islands with data loggers and DIY sensors. It's loud, annoying, and fun!
Luminous Lowtops 66 Chameleon Bag 86 Glow Plug 3D Printer Extruder 98
Snazzy sneakers with full-color LEDs that respond to your moves. An interactive messenger bag that reacts to your RFID-tagged objects. Make an extruder by hand using only a few tools and a diesel glow plug.
Salt and Pepper Well 70 Toy Inventor's Notebook 89 Howtoons 99
Woodworking with a twist — use your drill press as a lathe. Stop ants from getting into the hummingbird feeder with a DIY moat. Build a nifty ripcord rotor copter with an emery board propeller.
Library Box 74 Enough Already 90 Homebrew: Pinball Machine 112
A mobile, anonymous wi-fi file server from off-the-shelf hardware. Use an Arduino to mute annoying celebrities on your TV automatically. One man's journey to build a pinball machine from the ground up.
Zombie Flashlight 75 Bass Bump 92
TOOLBOX
Revive a dead battery to make this powerful pocket flashlight. Build this circuit to boost low frequencies and make your MP3s go boom.
License Plate Guitar 76 123: Self-Filling Pet Water Bowl 93 Tool Reviews 100
A “resonator” guitar with a hand-wound electromagnetic pickup. Keep your pet happy and hydrated with this simple build. MAKE's recommendations for useful maker tools and materials.
Remaking History 80 Bamboo Hors d’Oeuvre Tray 94 Books 104
Build the simple plane that defined modern aircraft. A few clever cuts and you’ll be serving in style. Text tools for your bench or bedside table.
Three-Day Kimchi 82 Mini Blind Minder 95 New Maker Tech 106
Piquant, fiery, and fast to make. Train your blinds to automatically open when it's cold and close when it's hot. On the horizon for 3D printing, Arduino, and Raspberry Pi.
2 makezine.com
Maker Profi le: RC Dragster Sports
Ilo Floyd builds high performance frames and drive trains for RC dragster cars with
his Tormach PCNC 1100. These dragsters are powered by Lithium batteries and race
on a 1/10th scale quarter mile track that is 132 feet long. His record is 1.49 seconds
at over 90 miles per hour. Learn more at www.tormach.com/dragsters.
PCNC 770 Series 3
starting at:
$6850 (plus shipping)
Mills shown here
PCNC 1100 Series 3 with optional stand
starting at: and accessories.
$8480
(plus shipping)
www.tormach.com/dragsters
M37_003_Tiertime_Tormach.indd 3 12/16/13 5:11 PM
#readerinput makezine.com/xxxxxxx
CONTRIBUTORS
“One finds limits
by pushing them.” What fantastic
—Herbert Simon contraption would
you love to build?
FOUNDER & PUBLISHER PRESIDENT & COO
Dale Dougherty Greg Brandeau
[email protected] [email protected] Tom Kuehn
Author, My Own
Pinball Machine, p. 112
EDITOR-IN-CHIEF VICE PRESIDENT My ultimate fantastic
Mark Frauenfelder Sherry Huss contraption would be
[email protected] [email protected] to build a house from
the ground up. The house would
EDITORIAL DESIGN, SALES MARKETING be powered by renewables, have
EXECUTIVE EDITOR PHOTOGRAPHY & ADVERTISING SENIOR DIRECTOR smart adaptive energy control with
Mike Senese & VIDEO SENIOR SALES MANAGER OF MARKETING sensors to detect and predict your
[email protected] CREATIVE DIRECTOR Katie D. Kunde Vickie Welch habits, and be centrally controlled
CcMluiAnmNd@AymG aILNkueGzm iEneD.cITomOR JjAbRaabTsl eoDrnI@Rm BEaCakTebOzlinReer.com kCSaAetiLecE@ilSmy Ma BkAeezNinnAezG.coEonRm vMMwAeeRlgcKh @MEmTaIaNskeGoz niCnOe.OcoRmDINATOR abanne ddtr wraopet bad taoinwogra sfri,re be. opAollaksccoea t shdeeo roleerv swe!rosu,l d
Juliann Brown
PROJECTS EDITOR [email protected] MARKETING COORDINATOR Skyler Tiffin
Keith Hammond SENIOR DESIGNER SALES MANAGER Karlee Vincent Author, Self-Filling Pet
[email protected] Pete Ivey Brigitte Kunde MARKETING RELATIONS Water Bowl, p. 93
GSEoNlIiO MR oEhDaITmORmadi JPHeOffTrOe EyD BITrOaRverman [email protected] CCOoOuRrDtnINeAyT OLRe ntz Mbey ccaolnletrda tphteio Pna wcko uld
gSoElNi@ImOaRk eEzDinIeT.OcoRm GPHuOnTtOhGeRrA KPHirEsRch MCMLAiIrNEaNAnGTd ESRaE RMVaICgEeSr MAKER FAIRE my homewo‘ermk i nUtpo.  m Ity w boauclkdp pauctk
Sshtoelbtrto [email protected] VIDEOGRAPHERS CMLAINENAGT ESRERVICES LPRoOuDisUeC EGRlasgow aWt hsecnh oI oolp wenh eunp Im clyo lsoec kmeyr laogcakienr,.  
SsTrEeaCgaaHnnN@ MImCaiAckLeh zEainDeeI.Tlc oORmRa gan NEFAmaBtRm WICaiAnlTsuOoeRnl- MHoetcakathorn MSEXuaEzrCaaUn TLnIiVenE c HAouSlSnsItSoTnANT BMAriRdKgEeTtINteG V&a PnRd erlaan mIp cayoc ubkl omdo gky oss thwuoofmfu uledp w.beit hino umt yh baavign agn tdo
LASaSuIrSaTA CNoTc EhDrITaOnRe Daniel Spangler FINANCE CONTROLLER SPRaObGrRinAaM MDIeRrElCoTOR Mikal Hart
Kevin Gushue Author, Finding Your
STAFF EDITOR WEBSITE CUSTOMER SERVICE Way with GPS, Use
AEDrIwTOeRnIA OL’ ARSeSiIlSlyTA GNrTiffith PDDEIaRVrEEkCLeTOOrPR TM OhEFNo WTm EaBs CVIOCEM PMREESRIDCEENT CTEUASMTO LMEEARD ECRARE tNheet wIriodriku min SYoauterl lite
Craig Couden OF COMMERCE Daniel Randolph Project, p. 58
WEB DEVELOPERS David Watta [email protected] In the late 1970s I was swept into
COPY EDITOR Jake Spurlock Manage your account online, the (brief) rolling ball clock fad.
LSEaNuIrOiRe E BDaITrOtRo,n B OOKS jCspoulrelo [email protected] &DMI AORRPEKCEERTTOAIRTNI,O GR N ESTAIL imncalkuedzininge c.choamng/aec ocfo audndt ress: Ebyv eror lsliinngc eb,a Il’lv aen bde mene ecnhtahnriaclalel d
866-289-8847 toll-free
Brian Jepson WEB PRODUCERS Heather Harmon in U.S. and Canada sculptures. I want to make a big
PEDaItTrOiRck, B DOiOJKuSsto BDailvl iOdl Bsoenauchamp [email protected] 851 a8.m-4.8–75- 2p0.m37.,, P ST tloimtse okfe peinpgin pgo dnegv bicael ltsh bate iinnvgo blvloews n
MAKER SHED GRAPHIC Comments may be sent to: up into, and falling out of, arrays
DIGITAL FABRICATION EDITOR WEB DESIGNER DESIGNER [email protected] of overhead PVC tubes, gated by
Anna Kaziunas France Amy Woods Uyen Cao Visit us online: servo-controlled arms.
makezine.com
CONTRIBUTING EDITORS CONTRIBUTING ARTISTS OPERATIONS MANAGER
William Gurstelle, Charles Platt, Nick Dragotta, Andrew Goodman, Rob Bullington Follow us on Twitter: Chad Kapper
Matt Richardson Viktor Koen, Rob Nance, Peter @make @makerfaire Author, The
JCeOffNreTyR BIBlaUnTkI, NPGhi lW BRoIwTiEe,R ASndy OSt’Traoionl,e J, uDliaem Wieens tScogin, Peter HBMUAeSNaIAtNhGEeESRrS BDErVuEnLdOaPgMeENT @OOnncr GFaaoftco eg@blmeo+oa:k kg:e omrosaghkleeed.mcoamga/+zminaeke HI laonvde ybCloepntdeirn, gp .o 4ld4
Brown, Ken Burns, Ryan Calo, CONTRIBUTING DESIGNERS SENIOR CHANNEL style tech with new
Alex Carrillo, Eric Cheng, Adam James Burke MANAGER PUBLISHED BY ideas. A steam pow-
Conway, Marque Cornblatt, Larry Ilana Budanitsky ered quadcopter with a vintage
Cotton, Len Cullum, William ONLINE CONTRIBUTORS MAKER MEDIA, INC. plate camera would be a fun
GGrraifsfisthie, ,M Jaiksaoln H Garritf,f eGyr,e Sgaouryl AMleags dAalilra nA lClaonle, ,J Mohicnh Baaeilc Chotalol,m bo, PENROGDINUECETR DEVELOPMENT Dale Dougherty, CEO challenge!
HHaoyeefesr, ,R Moissst eHre Jraslhobpeyr, gJearn,e St tJeavye, JHiamlemyy P DieiRrseosnta-,C Noixc,k A Nndorremwa l, Eric Weinhoffer TECHNICAL ADVISORY BOARD Clayton Richter
CKhinairdy K, Bapopbe Krn, Aetdzagmer K, Teommp ,K Luaeuhrna, SGalelonm Wohniten, eAyndrew Terranova, PMRAONDAUGCETR INNOVATION KLaipbpo rBartaodrfieosrd, L, Eimviol rM Fardie Sdc, iJeoneti st Author, Luminous
Tod Kurt, Andrew Petersen, Michael Castor Grand, Saul Griffith, Bunnie Lowtops, p. 66
LKoagtharny nL aMPclaEnlrtoey, ,S Fteovrere Lsot dMe.f iMnkim, s INTERNS HEruicaan gS,a Tdoumn, IMgoaer,c S dtee vVei nLcokdefink, A fantastic contrap-
III, Mike Outmesguine, John Edgar Paloma Fautley (engr.), Sam tion that I would
PPRSWpaoiecirlnknlky rd,S a RyBcd oJho,b eebMehr Prataltatneutra, s SkJr,s taaJu, s aTlCotmrzlnea,e mySSstkho aRyonylurn eRtter,ti e,cPT Drhia,fto ufeinnlr ,, F(N(jerrin.ce gekern mP.g)a,ar Wrn.)k, y( sBen (nrteeiganrrng .W) r,M .oA),eo nEldadlsonr eyi( e w(Sen anKglgrain.rt).az),s CMAwPlroialtip nhkryitoegreurihdg tMt hispnet er d©trehimsa e2e,i 0sUrInvs1Seci4oA.d n .b Riyse pprroohdiubcitteiodn. tdvhiissaipot lnrae yifcs oy iort duus lswi iwknaehgv e tapo t e ymrosauisk dteer aniswc ae a -pnoedf-n
Undeen, Marc de Vinck, Craig Schumann Printers, Inc. it back and forth.
Wilson, Chester Winowiecki,
Joseph Zinter
William Grassie
Statement of Ownership, Management and Circulation: 1. Publication Title: Make Magazine; 2. Publication Number: 1556-2336; 3. Filing Date: 10/01/13; 4. Issue Frequency: Quarterly; 5. Number of Author, Quadcopter
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Complete Mailing Address of Headquarters: same; 9. Full Names and Complete Mailing Addresses of Publisher, Editor, and Managing Editor: Publisher: Dale Dougherty, Editor: Mark Frauenfelder, Photogrammetry, p. 42
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4 makezine.com
M37_004_masthead_F1.indd 4 12/14/13 11:09 AM
M37_005_Shopbot.indd 5 12/13/13 4:33 PM
WELCOME
makezine.com/37
Mind
Your
Drone
WRITTEN BY
DALE DOUGHERTY,
founder and CEO of
Maker Media.
Not everybody likes the word drone — This helps set up the problem. We not vehicle. A drone then might be said to have a
industry and military experts avoid using only need to figure out a definition for mind of its own.
the “D word” in public. They prefer the term drones, we also have to figure out what Until such time, however, that
“unmanned aerial system or vehicle” and they’re going to do — and not do. While responsibility falls on the person flying the
associated acronyms UAS or UAV. Despite some agree that drones are unmanned, drone. When you fly a drone, you aren’t
plenty of misgivings about military and others point out that they’re piloted, just a user — you’re a pilot. You must
spy drones, the word drone has become preferring the acronym RPA for “remotely protect your equipment, yourself, and
widespread and popular, used with great piloted aircraft.” That wouldn’t differentiate most importantly, other people. A bad or
enthusiasm by hobbyists who hang out on drones from remote-control aircraft, but incompetent pilot can injure people or
the DIY Drones site and by professional it emphasizes that a human, who can be invade their privacy. It’s not a lot different
aerial photographers like the L.A.-based held responsible, is at the controls. A drone from owning a pet or a car.
Drone Dudes. So what is a drone? can be operated manually or it can be Good pilots, like the Drone Dudes, worry
The original meaning of drone is a male programmed to follow a fixed flight plan. that bad or careless pilots will garner
bee. The body of a drone is bigger than all The distinguishing feature of a drone the public’s attention, create a climate of
other bees (except the queen), but what seems to be the promise of autonomy. fear, and cause governments to restrict
physically distinguishes a drone is a larger Today, a typical flight consists of switching or eliminate drones for commercial or
pair of compound eyes. Yet drones have no between manual flight and autopilot. How recreational use. The reason we need bet-
real work to do but reproduce. They make much further might it go? Given the right ter technology is that few of us are very
late afternoon flights to what is called a instrumentation and the ability to process good pilots.
congregation area, where drones gather that data, could a drone be programmed to For makers, the most interesting
looking to mate with a virgin queen. Once make context-aware decisions, particularly challenge isn’t just building drones or
these bees succeed, however (and they ones that humans are not very good at? A flying them. It’s discovering what drones
perform this act in mid-air), the drones fall drone might detect problems before they are good for, what creative uses they have,
out of the sky, having left an essential body occur, such as responding to gusts of wind and what tough problems they might solve.
part behind. That’s all that drones do. or avoiding unexpected obstacles. A drone Otherwise, planes and quadcopters will
The notion that a drone doesn’t have might also be able to communicate with be sold only as toys, not tools, and many
much work of its own leads to a secondary other drones. people will discard them once they lose
definition of a drone as someone who lives Can a drone be considered a robot, able interest in their playthings. We’re hoping
off the work of others — a parasite. In fact, to obey Asimov’s Three Laws of Robotics? drones become platforms for developing
at the end of summer, the worker bees kick We need drones that explicitly avoid compelling applications that will push the
the remaining drones out of the hive. They harming humans and can act to protect technology forward and adjust the bal-
eat too much and do too little. They can be themselves from destruction. We should ance between the light and the dark side
replaced in the spring. expect this much from any fully autonomous of drones.
Vol. 37, January 2014. MAKE (ISSN 1556-2336) is published bimonthly by Maker Media, Inc. in the months of January, March, May, July, September, and November. Maker Media is located at 1005 Graven-
stein Hwy. North, Sebastopol, CA 95472, [phone]. SUBSCRIPTIONS: Send all subscription requests to MAKE, P.O. Box 17046, North Hollywood, CA 91615-9588 or subscribe online at makezine.com/
offer or via phone at [phone] (U.S. and Canada); all other countries call [phone]. Subscriptions are available for $34.95 for 1 year (6 issues) in the United States; in Canada: $39.95 USD; all
other countries: $49.95 USD. Periodicals Postage Paid at Sebastopol, CA, and at additional mailing offices. POSTMASTER: Send address changes to MAKE, P.O. Box 17046, North Hollywood, CA 91615-9588.
Canada Post Publications Mail Agreement Number 41129568. CANADA POSTMASTER: Send address changes to: Maker Media, PO Box 456, Niagara Falls, ON L2E 6V2
6 makezine.com
M37_006_Welcome_F1.indd 6 12/14/13 11:19 AM
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READER
INPUT makezine.com/37
Nuclear Fusors, Homemade Sugar Rockets,
Hard Cider, and 3D Printing Raves
» I CONTINUE TO BE AMAZED AND DELIGHTED WITH MAKE. I have to
commend your contributors for their ingenuity and practicality. In the latest
issue (Volume 36) I was especially fascinated by the Nuclear Fusor project by
Dan Spangler — well written, clear, and concise. I do, though, have to take
issue with his statement on page 93 regarding Philo Farnsworth. John Baird
transmitted the first televised pictures of moving objects in 1924, the first
televised human face in 1925, and the first real-time moving object in 1926.
But it was electronics inventor Farnsworth who is credited with inventing the
first completely electronic television. So to clarify, it was Baird who invented
television and Farnsworth who invented the first fully electronic television.
Your magazine really inspires me up from my seat to get involved and
make things. I wish it would be more widely available in the U.K., as I’m sure
it would inspire many young inventors and engineers. With this thought, I
will be donating a yearly subscription to my old school.
—Christopher Glasgow, Byfleet, Surrey, U.K.
» Earlier this bucket and fell in, causing me to have to IN RESPONSE TO THE B9 CREATOR
month my son strain everything again. Second, my brewing REVIEW IN THE MAKE: ULTIMATE GUIDE
TO 3D PRINTING 2014 (PAGE 93):
Tucker and I bag gets clogged up pretty fast. Strains
followed William really well, but requires a lot of squeezing » I own a B9 and have been absolutely blown
Gurstelle’s at the end to get all the juice out. Third, the away by the detail it is able to produce. I use
instructions bottled cider flavor really reflects what you it for my business as a product designer and
to build the put into it. The apples, for example, were for making N-scale model trains — where
Homemade tarter than my pears. Fourth, the sugar it is able to match (yes, match) the detail
Sugar Rockets added beautiful little bubbles. Haven’t of injection-molded parts. I had about 15
featured sampled the non-sugared bottles, yet. prints where I made various mistakes but
in MAKE Without the suggestion of using a juicer, now it pretty much works every time, and
Volume 35 I might not have made any cider this year. Mike Joyce [the founder] has personally
(page 70). We failed, learned, failed some But your instructions provide a clear and helped me to overcome issues along the
more, learned some more, and through easy path for a first-timer. Well done. way — as he has for almost everyone who
persistence had great success and —Matt Friedrichs, via the web has bought one of these machines. I have
improved the recipe to our liking, and no affiliation to Mike or B9, except as a
hopefully to yours, too. I hope the following » I gotta admit, I’ve really been enjoying very, very satisfied customer. If you want
notes on the process will help you with these practical examples of 3D printing small parts with exquisite detail (jewelers,
this fast, easy, and super-fun project. that you guys have been kicking out lately small scale modelers, small product
—Wayne Arendsee, Fort Worth, Texas (Make: Ultimate Guide to 3D Printing 2014, prototypes), then this is the machine for you.
page 14, “10 Cool 3D Printed Objects,”). — Robert Fryers, via the web
+ Read Wayne's tips and tricks at makezine.com/fatherson/.
We’ve seen years of 3D printers kicking
» Thanks for the great tutorial (Volume out the same Yoda heads. I’ve frankly been » It’s worth stressing that this entire project
36, page 132, “Kitchen-Table Cider rather skeptical about the “3D Printing has been open sourced by Joyce. I built my
Making”). My notes from one batch of Revolution” that’s been prophesized, own printer, loosely based on his designs
apple cider and two batches of pear: and still am somewhat, but these posts and using his software, and he was incredibly
First, the filtration bag gets heavy. I made are changing my thinking bit by bit. helpful as I was feeling my way through. A
the apple cider without the bucket with —Andy Tanguay, Ann Arbor, Mich. very generous maker, with a very cool prod-
holes and the bag slipped off the larger uct! —William Fredette, Worcester, N.Y.
MAKE AMENDS: In MAKE Volume 36’s Country Scientist column, “How to Use LEDs to Detect Light,” in the schematic in Figure D (page 138)
the LED should be reversed, with the anode connected to ground and the cathode connected to IC1-2. Thanks to intrepid reader Rob Kuschinsky for
pointing this out.
8 makezine.com