the lego power functions idea book: cars and contraptions
TRANSCRIPT
T H E F I N E S T I N G E E K E N T E R TA I N M E N T ™
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This book is not authorized or endorsed by the LEGO Group.
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This second volume of The LEGO ® Power Functions Idea Book, Cars and Contraptions, showcases small projects to build with LEGO Technic gears, motors, gadgets, and other moving elements. You’ll find hundreds of clever, buildable mechanisms, each one demonstrating a key building technique or mechanical principle.
You’ll learn to build four-wheel drive cars, adorable walking ‘bots, steerable tanks, robotic inchworms, and cars that can follow the edge of a table!
Each model includes a list of required parts and colorful photographs that guide you through the build without the need for step-by-step instructions. As you build, you’ll explore the principles of gear systems, power translation, differentials, suspensions, and more. cars and
contraptions
ca
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ns v
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Y o s h i h i t o i s o g a w a
the LeG
o po
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s idea
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the LeGo power
Functionsidea Book,
®
ImagIne. Create. Invent. now, what wIll you buIld?
yoshIhIto Isogawa
is a LEGO luminary with 46 years of building
experience. In addition to running Isogawa
Studio, Inc., he regularly holds LEGO work-
shops, lectures at schools and
science museums, and creates
LEGO models for events and
exhibitions. He is the author of the LEGO® Technic Idea
Book series and The LEGO® MINDSTORMS® EV3 Idea Book
(No Starch Press), as well as many Japanese-language
LEGO titles.Y
os
hi
hi
to
i
so
ga
wa
®
The LeGO® POwer FuncTiOns idea BOOk cars and cOnTraPTiOns
cars and cOnTraPTiOns
Y o s h i h i t o i s o g a w a
The LeGO®
POwerFuncTiOnsidea BOOk
VOLUME 2
The LEGO® Power Functions Idea Book, Volume 2: Cars and Contraptions. Copyright © 2016 by Yoshihito Isogawa.
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior
written permission of the copyright owner and the publisher.
First Printing
19 18 17 16 15 1 2 3 4 5 6 7 8 9
ISBN-10: 1-59327-689-3
ISBN-13: 978-1-59327-689-8
Publisher: William Pollock
Production Editor: Riley Hoffman
Cover Design: Beth Middleworth
Photographer: Yoshihito Isogawa
Author Photo: Sumiko Hirano
Developmental Editor: Tyler Ortman
Technical Reviewer: Sumiko Hirano
Proofreader: Fleming Editorial Services
For information on distribution, translations, or bulk sales, please contact No Starch Press, Inc. directly:
No Starch Press, Inc.
245 8th Street, San Francisco, CA 94103
phone: 415.863.9900; [email protected]
www.nostarch.com
The Library of Congress has cataloged the first volume as follows:
Isogawa, Yoshihito, 1962-
The LEGO power functions idea book / by Yoshihito Isogawa.
pages cm
Summary: “A compilation of small projects to build with LEGO Technic parts, including gears, motors, gadgets, and
other moving elements. Contains step-by-step building instructions for rack-and-pinion steering systems, sliding
doors, grasping claws, and ball-shooting devices. Explores principles of simple machines, gearing, and power
translation”-- Provided by publisher.
ISBN 978-1-59327-688-1 -- ISBN 1-59327-688-5
1. Machinery--Models. 2. Power (Mechanics) 3. LEGO toys. I. Title.
TJ248.I863 2016
621.8--dc23
2015021881
No Starch Press and the No Starch Press logo are registered trademarks of No Starch Press, Inc. Other product and
company names mentioned herein may be the trademarks of their respective owners. Rather than use a trademark
symbol with every occurrence of a trademarked name, we are using the names only in an editorial fashion and to the
benefit of the trademark owner, with no intention of infringement of the trademark.
LEGO®, MINDSTORMS®, the brick and knob configurations, and the minifigure are trademarks of the LEGO Group,
which does not sponsor, authorize, or endorse this book.
The information in this book is distributed on an “As Is” basis, without warranty. While every precaution has been
taken in the preparation of this work, neither the author nor No Starch Press, Inc. shall have any liability to any person
or entity with respect to any loss or damage caused or alleged to be caused directly or indirectly by the information
contained in it.
ContentsIntroduction · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1
PART 1 • Vehicles
Driving wheels with a motor · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4
4WD cars · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 22
Each motor turns a wheel · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 32
Caster wheels · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 44
Steering with the servo motor · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 50
Differential gears · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 68
Crawlers · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 82
Cars that spin something · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 92
Cars that move something · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 104
vi Contents
Cars with suspension · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 114
Five different bases for a small car · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 132
Cars that react · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 148
Cool cars · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 172
PART 2 • Moving Without Tires
Two-legged walkers · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 196
Four-legged walkers · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 208
Six-legged walkers · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 220
Cool walkers · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 224
Moving like an inchworm · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 234
Moving through vibration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 240
Moving in other ways · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 244
Contents vii
PART 3 • Special Mechanisms
Intermittent motion · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 250
Smooth changes of rotation speed · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 256
Switching rotational direction · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 264
Changeover mechanisms using a switch · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 272
Transmissions · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 288
Changeover mechanisms using rotational direction · · · · · · · · · · · · · · · · · · · 308
Parts list · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 314
IntroductionThis is an idea book, offering hundreds of projects and mechanisms you can build with LEGO Technic parts. The book especially focuses on LEGO Power Functions, which is the latest version of the Technic system of motors, lights, and other electric building elements.
Where Are the Words?Other than this brief introduction and the table of contents, this book has almost no words. Instead, you’ll find a series of photographs of increasingly complex models, each designed to demonstrate a mechanical principle or building technique.
While the book lists the pieces needed to build each model, it does not include step-by-step building instructions. Look at the photographs taken from various angles and try to reproduce the model. Building in this way is something like putting together a puzzle. You’ll get the hang of it after a little practice.
The Use of ColorThe examples in this book are made with parts of various colors to make it easier for you to see the individual bricks’ shapes. But you don’t need to use the colors I’ve chosen in your models; use whichever colors you want to make the projects your own.
Substituting Parts The parts used in this book were selected from among the easily obtainable ones as much as possible, but you’ll probably still be missing a few.
Try to build as many models as possible using the parts that you already own. If you find that you’re missing parts, try to think of ways to substitute other parts for the ones that you’re missing.
For example, there are many types of LEGO tires. If you don’t have the tires shown in a par-ticular project, try using any tires you have that are a similar size. Also, there are several types of Power Functions motors. In this book, the com-monly available Medium (M) motors are used most frequently. It’s relatively easy to replace the M motor with the Large (L) motor or older motors from earlier systems, so use whatever you have available.
The Parts List in the back of the book will help you find the pieces you need.
You Are the CreatorLook at the models you build closely. By thinking about how they move and why they are designed that way, you will greatly improve your building skills.
This is an idea book; it’s about imagination. It is my sincere hope that you make these proj-ects your own, combine them, and evolve them into something even better—your own original models.
PART 1
4
22
32
44
50
68
82
92
104
114
132
148
172
Vehicles
4 Driving wheels with a motor
12
Driving wheels with a motor
×2
×4 ×4
×2
×23
8:24 = 1:3
#1
Driving wheels with a motor 5
37
×2
×2
×2
×2
×2
×6
×2
×2
×4 ×46
12:12 = 1:1
#2
6 Driving wheels with a motor
37
10
×3
×2
×2
×2 ×2
×2
×2×4 ×4 ×4
12:20 = 3:5
#3
Driving wheels with a motor 7
×4 ×4
×2
×2 ×2
37
×26
×6
×2
×2
12:20 = 3:5
#4
8 Driving wheels with a motor
×4 ×4
×4
×2
×27
×2
×6
×2×2
×2
8:24 = 1:3
#5
Driving wheels with a motor 9
×4 ×4 ×4
×2
×2 ×2×2
10
8:24 = 1:3
#6
10 Driving wheels with a motor
3
×2
×2
×2
×3 ×6
×2
×4 ×4
×4
12:12 = 1:1
10
#7
Driving wheels with a motor 11
×4 ×4
×5×2
10
20:12 = 5:3
×2
×4
#8
12 Driving wheels with a motor
×4
×2
×2
20:12 = 5:3
×2×2 ×2×2
8
×2
#9
Driving wheels with a motor 13
×4 ×4
×2 ×2×2
7
×6
×4
×3
12:20:12 = 3:5:3
3
#10
14 Driving wheels with a motor
×4 ×4
×2
×2
×2
×27
×8
×2
×2×4
×3
20:12:12 = 5:3:3
3
#11
Driving wheels with a motor 15
×2×2
×14
×5
3
×4 ×4
10
#12
8:2412:20
1:33:5
=
16 Driving wheels with a motor
×4 ×4
×3
20:12:20 = 5:3:5
×2
6
#13
Driving wheels with a motor 17
×4 ×4
7
×2
×6
×2
12:12 = 1:1
3
×2
×2
×2
×2
#14
18 Driving wheels with a motor
×2 ×2
×2 ×6×4 ×4
10
12:20 = 3:5
×2
×2#15
Driving wheels with a motor 19
×4 ×4
×4 ×2
×2
12:20 = 3:5
3 4 6
#16
20 Driving wheels with a motor
×4 ×4
×2
×2 ×3 ×6
×2
×2×2
1:8
5 6
8
#17
Driving wheels with a motor 21
×10
12:20 = 3:5
×2
×2
×4 ×4
×2
×2
×27
3
#18
22 4WD cars
4WD cars
×4
×4
3
10
×2
×2 ×2
×2
×2 ×3
×2 ×2
×6
×14
#19
4WD cars 23
24 4WD cars
×4 ×4
×2
×2×2
×4 ×8×3 ×2 ×2
×2 ×2
8
10
#20
4WD cars 25
26 4WD cars
×4
×4 ×4
×4
×4 ×2 ×2 ×2
×2
×2
×2
×2
×4
×3×2
3 5
6
7
8#21
4WD cars 27
28 4WD cars
×4
×4
×4
×2
×2
×3 ×3×3
×2 ×2 ×2
×2
×8
×8
3
10
#22
4WD cars 29
30 4WD cars
×4
×35
×4
×4
×2
×2×2
×2
×5
×11
×2
3
4
8
10
#23
4WD cars 31
32 Each motor turns a wheel
Each motor turns a wheel
You can build cars that steer by
combining these with the models in
Caster wheels (page 44).
×2
×2
×2
×2 ×2
×2
×2 ×2
×2×2
×2
×4
×4
×2 ×2
×2
×2
×2
3 4
5
7
10
#24
Each motor turns a wheel 33
34 Each motor turns a wheel
×2×2
×2×2
×2
×2×3
×6×2
×2
×2
×4
×2
×24 6
×8
×6
×6
#25
Each motor turns a wheel 35
36 Each motor turns a wheel
×2
×2
×2
×2
×2
×2
×2
×4
×4 ×4×2
×2
×2
×2
×2
×2
×2
3 4
6
×2
×2
×12
#26
Each motor turns a wheel 37
38 Each motor turns a wheel
×2 ×2
×2 ×4 ×2
×2
×3×2
×2×2
×4
×223 5
#27
Each motor turns a wheel 39
40 Each motor turns a wheel
×2
×2×2
×2×2
×2
×2
×2
×2×2
×2 ×2 ×26
×4
×4 ×6
×16
5
#28
Each motor turns a wheel 41
42 Each motor turns a wheel
×2
×2
×2 ×2 ×2×3
×4
×4
×4
×2×2
×4×2
3 4
×2
×2
×14
#29
Each motor turns a wheel 43
44 Caster wheels
Caster wheels
×2
×2 ×2
×2 ×2
You can build cars that steer by
combining these with the models in
Each motor turns a wheel (page 32).
#30
#31
Caster wheels 45
×2
×2 ×2
×2 ×3
#32
#33
46 Caster wheels
×2
×2
×2
×2
×2×2 ×2
×2
×2
×2
×2
3#34
#35
Caster wheels 47
×2
×2
×2
×2
×2 ×2
×2
×2
×2
×4
×4
×2
×2
×2
3#36
#37
48 Caster wheels
×2 ×2
×2×2
×2 ×3
×2
4
4
3
#38
#39
Caster wheels 49
×3
×2
×2
×2
×2×4
×6
3
5
#40
#41
50 Steering with the servo motor
Steering with the servo motor
×4
×4
×4
×4
×6
×12
×2
×2
×2
×2
×2×2 ×5
×2
3
4
8
You can combine these models
with those in Differential gears
(page 68).
#42
Steering with the servo motor 51
Servo Motor
52 Steering with the servo motor
3
5
×2 ×2 ×2
×2
×2 ×2
×2
×6
×3
×3
#43
Steering with the servo motor 53
54 Steering with the servo motor
×2 ×2×6
×4×2
×2
×2
×2
×5
4
5 64
#44
Steering with the servo motor 55
56 Steering with the servo motor
5
×2 ×2 ×2
×2 ×2
×2
×2
×4
×4
×2
4
#45
Steering with the servo motor 57
58 Steering with the servo motor
×2
×6
×2
×10
×2
×2 ×2 ×3
×2
×2
×2
×2×2
×2 ×3
43
#46
Steering with the servo motor 59
60 Steering with the servo motor
×2
×2
×2
×2
×10
×2
×2 ×2 ×4
×2 ×2
×2
×4
×4×4
×2
43
#47
Steering with the servo motor 61
62 Steering with the servo motor
×2×6
×2 ×12
×2
×2
×2
×3
×3
×2×2
×2
×4
×2
×2
3 5
#48
Steering with the servo motor 63
64 Steering with the servo motor
×2×2
×3
×4
×4×4
×2
×2
×2 ×5
×4
×4 ×14
×2
×2
×2
×2
×2
×2
×2 ×2×73 5 64
#49
Steering with the servo motor 65
66 Steering with the servo motor
Steering with the servo motor 67
68 Differential gears
Differential gears
×2
×2
×3
×2
×6
×2×2
×2
4
5
You can combine these models
with those in Steering with the
servo motor (page 50).
#50
Differential gears 69
When a car turns, the
right and left wheels travel
different distances—
the outside wheel
travels farther.
70 Differential gears
×2
×2
×3
×4×2
×6
×2
×2
×3
4
×2 ×2
3
#51
Differential gears 71
72 Differential gears
×2 ×2
×3
×12
×2
×2
×2×2 ×25
#52
Differential gears 73
74 Differential gears
×2
×3
×4
×2
×2
×2×2 ×25
4
#53
Differential gears 75
76 Differential gears
×2
×3 ×3
×2
×2 ×2
×2
×2 ×2
5
6
#54
Differential gears 77
78 Differential gears
×2 ×2×2
×2
×2
×2
×3 ×6
×8
×2 ×2×2
×2
×3
×2 ×2
5
4
3
6
7
#55
Differential gears 79
80 Differential gears
×4
×4
×4
×2 ×2
×2
×2
×2 ×2
×2 ×2
×2
×2
×2
×2
×3
3
6
8
9
#56
Differential gears 81
82 Crawlers
Crawlers
×2×2
×4×68
×4
×4
×2×3
×2
5
9
#57
Crawlers 83
84 Crawlers
×6×52
×2
×2
×2×2
×2 ×55
3
6
×2
×4
×4
#58
Crawlers 85
86 Crawlers
×6
×4
×4
×4×4
×4
×6
×58
×3
×2
×4×2
×2
×2
×2
×35
3
×2×2
×4
7
4
#59
Crawlers 87
88 Crawlers
×10
×98
×4 ×4
×2×2
×4
×8
×20
×8
×23
×2
×2
#60
Crawlers 89
90 Crawlers
×24
×54×2 ×2
×2
×2
×3×2
×5
×4
×4
×3
×6
×43
×4
×2
×35
4
×2 ×2
×2 ×2×2
#61
Crawlers 91
92 Cars that spin something
Cars that spin something
×2
×2
×4
×3
×7
×2
×2
×2
×2
3
4
7
10
×2 ×2 ×2 ×2
#62
Cars that spin something 93
94 Cars that spin something
×2
×4
×2
×2
×2
×2
×4×4 ×4
4
5
6
8
4
#63
Cars that spin something 95
×2
×8×3
×4×4
×4
4
8
×4
×2
×2
×2
×27
#64
96 Cars that spin something
×3
×2
×2
×4
×2
×8
3
×4
×3
5
6
7
×4
×4
×4
×2
×2
#65
Cars that spin something 97
98 Cars that spin something
×2
×3
×2×2
×2 ×2 ×2
×13×6
×2
×2
×2
×2
×3
×2
4
5
8
12
×4×4
×6
×4
#66
Cars that spin something 99
100 Cars that spin something
×2
×2
×2
×2
×10
×6
×4
×4
3
4
7
10
×4 ×4
×2×2×2 ×2
×2
×2
#67
Cars that spin something 101
102 Cars that spin something
×2×3
×10
×6
×2×2
3
7
×2
×2 ×2
×4 ×4
8
×45
×4 ×4
×2×2
#68
Cars that spin something 103
104 Cars that move something
Cars that move something
×6
×2
×2
×4×3
×4 ×4
×4 ×2
×2
×23
5
7
#69
Cars that move something 105
106 Cars that move something
×33
7
×2×2
×2×2
×2
×2
×2
×6
×2
×4
×3
×2
9
12
×3 ×3
#70
Cars that move something 107
108 Cars that move something
×53
×4
×4
×2 ×2
×2×2
×8
×2
×2
×4×4
9
×24
5
×4 ×4
#71
Cars that move something 109
110 Cars that move something
×4
×14
×2
×2
×2
×2
×3
×2
×3
×24
5
6
7
8
12 ×6
×4 ×4
#72
Cars that move something 111
112 Cars that move something
3
×2
×2×4
×6
×6
×3
×2×2
×2
×2×4 ×44
5
6
7
8
×2×2
×4
#73
Cars that move something 113
114 Cars with suspension
Cars with suspension
×6×2
×3 ×2×2
×33
5
8
4
×4 ×4
×2 ×2
×2
×2
×4
#74
Cars with suspension 115
116 Cars with suspension
3
×20
×2
×2×2 ×2
×4×4
×4
5
7
×2 ×2×2
×2
×2
×2
×4
×6
×4 ×4
×4 ×4
×2
×4
#75
Cars with suspension 117
118 Cars with suspension
×12
×4
×2
×4
×4
×2
×2
×2 ×2
×4
×5
×4
5
10
#76
Cars with suspension 119
120 Cars with suspension
9
×2 ×3
×8
×4
×6
×8
×4
×4
×42
×92
×2
×4
×3
×2
×2
×2 ×2
3
5
4
×4 ×4
×4
×4×4
×4
×4
#77
Cars with suspension 121
122 Cars with suspension
Cars with suspension 123
124 Cars with suspension
×16
×2
×4
×4
×4
3
×4×4
×4×2
×2
×8
×2
×2
×2
×2
×3
×7
×2
×4
×4
×2
4
4
×2 ×2
×2
×2
×2
#78
Cars with suspension 125
126 Cars with suspension
Cars with suspension 127
128 Cars with suspension
×20
×14×7 ×2
3
×4 ×4
×4
×4×4
×4
×4
×2
×2
×6
×2 ×2
×4
×6
×3
×4×4
×4
×2
×3 ×3
×2
×6
4
5
7
#79
Cars with suspension 129
130 Cars with suspension
Cars with suspension 131
132 Five different bases for a small car
Five different bases for a small car
Five different bases for a small car 133
134 Five different bases for a small car
3
×12
×25
7×2
×2
×4
×4 ×4 ×4
×4
×3
#80
Five different bases for a small car 135
136 Five different bases for a small car
×4
×45
×2
×2
×2
×2×2
×2
×2 ×4
×6×4
×4 ×4
9
10
#81
Five different bases for a small car 137
138 Five different bases for a small car
×10
×35
×9
×2
×4
×2
×2
×2
×2
×2
×4
×3
×96
12
×2
×2#82
Five different bases for a small car 139
140 Five different bases for a small car
×2×4
×4
×35
×2
×2
×2
×2
×8
×2×2
×2
×6
×4 ×4 ×4
9
4#83
Five different bases for a small car 141
142 Five different bases for a small car
×4
×4
×4
×2
×2
×2
×2
×2
×2
×4
×8
×8
3
×35
7
#84
Five different bases for a small car 143
144 Five different bases for a small car
×16
×4
×2
×2×2
×2
5
×3
×4
×4
×8
×3×3
×3
×3
×4
×4
×3
×5
×2
×2 ×2
9
7
6
×63
×2 ×2
×3
×3
×4#85
Five different bases for a small car 145
146 Five different bases for a small car
Five different bases for a small car 147
148 Cars that react
Cars that react
×28
×2
×2
×2
×2
×6
3
×4 ×4
×6
×2
×2
×2
×8
×2
×2
×2
4
6
8
10
×2
×2#86
Cars that react 149
150 Cars that react
Cars that react 151
152 Cars that react
×14
×4
×2
×2
3
×4×4 ×4
×2
×2
×2
×2 ×2
×2
×2
×4
×3
8
10
×3
7
×55
×2×2
×2#87
Cars that react 153
154 Cars that react
×10
×2
3
×6 ×6
×4×2
×2
×4
×3
8
10
7
×2
×2
4
×2×4
×2
×4
#88
Cars that react 155
156 Cars that react
×9
×6
×2
×3
×2
×2
×3
×33
×34
9
×35
×3 ×3
×3#89
Cars that react 157
158 Cars that react
Cars that react 159
160 Cars that react
×9
×3×2
×2×2
×2
×2×2
×2
×2
3
×64
9×3
×3
5
×2 ×2
×2
×3
×8
×3 ×3
×2
×2
#90
Cars that react 161
162 Cars that react
Cars that react 163
164 Cars that react
×20
×2×4
×4
×4
×4
×5
×2
×2
×2
3
4
×3
×3
5
×2
×2
×2
×2 ×2×2
×3
×3
×4
×4 ×4
×4×2
×2×5
10
7
#91
Cars that react 165
166 Cars that react
Cars that react 167
168 Cars that react
×10
×3
×5
×5
×4
×4×2
×2
3 ×3
×3
4
×2
×35
×6 ×6
×10
×2
×2
6
#92
Cars that react 169
170 Cars that react
Cars that react 171
172 Cool cars
Cool cars
×4
×4
×4
×2
×4
×4
×43
5
×4 ×4
×2
×2
×2
×4×5
×16
×10
×2
×2
×2
×2
×2
×2
×3
7
#93
Cool cars 173
174 Cool cars
Cool cars 175
176 Cool cars
×6
3×3
7 ×2
×2
×2
×3
4
×2
×2
×2
×4
×4
×3
×4
×4
×4
×4
5
4
#94
Cool cars 177
178 Cool cars
×4
×6
×4
×2
×2
×2×2
×2
×6
×2
×6
×6 ×6
×6
×6
×2
3
5
6
9
#95
Cool cars 179
180 Cool cars
×26
×4
×2
×7
×2
×2
×2 ×2
×2×2
×2
×23
×34
×2
×2
×3×5
×3
5
×3
×5
×4
×4
×3 ×3
7
8
#96
Cool cars 181
182 Cool cars
Cool cars 183
184 Cool cars
×24
×3
×4
×4
×2
×2×2
3
×2
5
×2
×2
×2
×2
×4
×3 ×3
7
×6
×2
×2
9
4
#97
Cool cars 185
186 Cool cars
Cool cars 187
188 Cool cars
×17
×2
×4×3
3
5
×2
×2
×2 ×2
×2
×2
×4
×6
×6
×6
×4×4
×4×4
×6
×6
×2
×8
×2
×2
×2
×6
7
×2×4
×3
4
6
9
×2 ×2
×2
×4×4
#98
Cool cars 189
190 Cool cars
Cool cars 191
192 Cool cars
Cool cars 193
PART 2
Moving Without Tires
220
224
234
240
244196
208
196 Two-legged walkers
Two-legged walkers
×6×6
×2
×2
×2
×5
×2
×10
×4×4
×4
×4
×10
3
6
7
#99
Two-legged walkers 197
198 Two-legged walkers
×8×2
×4
×3
×2
×2
×2
×2
×2×2
×4
×4
×4
×22
×3
×8
×2
×6
×4
×3
6
3
7
Cloth
4
#100
Two-legged walkers 199
200 Two-legged walkers
Two-legged walkers 201
202 Two-legged walkers
×2
×2×13
×3
×2
×2
×2
×2
×6
×2
×2
×2
×2×2
×5
×4
×4
×4
×21
×3
×4
5
×6×2
×2 ×2
×6
×10
×8 6
3
10
7
#101
Two-legged walkers 203
204 Two-legged walkers
Two-legged walkers 205
206 Two-legged walkers
Two-legged walkers 207
208 Four-legged walkers
Four-legged walkers
×2
×2
×2
×2
×2 ×2
×2
×2
×2
×3 ×6
×4
×4
×8
5
×4
×2
3
#102
Four-legged walkers 209
210 Four-legged walkers
×2
×2
×2
×2
×4
×2
×2
×4
×3
×16
×2
×2
×2
×3
×10
×4
×4
3 5
6
7
#103
Four-legged walkers 211
212 Four-legged walkers
×2
×5
×2
×3
×2×2
×2
×9
×4
×4
×8
×4×2
×26
×3
×4
×4
5
×4
×4
×12
×14
9
4
6
3#104
Four-legged walkers 213
214 Four-legged walkers
Four-legged walkers 215
216 Four-legged walkers
×2×8
×8×4
×4
×4
×4×6
×2
×2
×4
×16
×4
×4
×4×2 ×8×4
×8
5 ×7
×7
×6
×12
×10×12
4
3
10
4
#105
Four-legged walkers 217
218 Four-legged walkers
Four-legged walkers 219
220 Six-legged walkers
Six-legged walkers
×2
×2
×6
×6
×5 ×4
×6
×14
×8
×185
×2
×2
×2
×2
9
7
#106
Six-legged walkers 221
222 Six-legged walkers
Six-legged walkers 223
5
224 Cool walkers
Cool walkers
×2
×2
×2
×2 ×2
×2
×4
×4
×2
×3
×3
×7
×2×2×2
×2
×12
3
4
7
#107
Cool walkers 225
226 Cool walkers
×2
×2
×2
×2
×2
×2
×2
×2
×2
×2
×4
×3
×3×4
×4
×4
×5
×15
×4
×5
5
×2
×2
×8×2
4
3
×9
×5
12
#108
Cool walkers 227
228 Cool walkers
Cool walkers 229
230 Cool walkers
×4
×4
×4
×2
×2
×2
×2
×2
×4
×2
×2
×4×2
×10
×4
×4
×6
×4
×4
×2
3
×12
#109
Cool walkers 231
232 Cool walkers
Cool walkers 233
234 Moving like an inchworm
Moving like an inchworm
×2
×2
×4 ×4
×2
×4
×4×4
×10
×2
×2
×4 ×2
×2 ×2
×6
×33
5
6
#110
Moving like an inchworm 235
236 Moving like an inchworm
×2
×6
×4
×4
×4
×2
×2
×10
×2×3
×3
×10
3
×2
×2
×2
4
5
6
8
×5
×4 ×4
×2×4
#111
Moving like an inchworm 237
238 Moving like an inchworm
Moving like an inchworm 239
240 Moving through vibration
Moving through vibration
×2
×2 ×2
×2
×2
×4
×2
×2 ×2
×2
×2
×2
×2
×11×6
×3
3
5
4
7
#112
Moving through vibration 241
242 Moving through vibration
×2
×2
×2
×2
×2
×2
×4
×2
×2
×2
×9
×2
×10
×2
×4
×2
×2
3
×2
5
#113
Moving through vibration 243
244 Moving in other ways
Moving in other ways
×2
×2
×2
×2
×2
×2
×2×2
×4
×4
×4
×4×4
×4
×2
×16
×13
×6
×2
×2
×2
×8
×8
×2
×2
×4
×3
3
5
4
7
6
#114
Moving in other ways 245
246 Moving in other ways
Moving in other ways 247
PART 3
Special Mechanisms
250
256
264
272
288
308
250 Intermittent motion
Intermittent motion
3×2
×5
×3
×3
6
4
#115
Intermittent motion 251
252 Intermittent motion
3
×2
×2
×2
×2
×2
×36
4
×3#116
Intermittent motion 253
254 Intermittent motion
3
×4
×3
×4×2
×2 ×2
×2
×2
4
7
5
#117
Intermittent motion 255
256 Smooth changes of rotation speed
Smooth changes of rotation speed
3
×2
×3
×2
×2×2
×2
×2 ×2
×2
6
×3
×3
×3
7
5
#118
Smooth changes of rotation speed 257
258 Smooth changes of rotation speed
×4
×2×2
×3
×29×2
×2 3
4
#119
Smooth changes of rotation speed 259
260 Smooth changes of rotation speed
×8×2
×3×4
×4
×2
×2
×2
×6
×2
×2
3
4
×2
×3
6
#120
Smooth changes of rotation speed 261
262 Smooth changes of rotation speed
3
×2
×2
6
×3
×2
×3
4
#121
Smooth changes of rotation speed 263
264 Switching rotational direction
Switching rotational direction
3
×6
×6
×8
×2
×2
×2 ×3
×3
×5
4
5
×2
×2
#122
Switching rotational direction 265
266 Switching rotational direction
×2×2
×13
×46
×3×3
×2
×2
7
5
#123
Switching rotational direction 267
268 Switching rotational direction
×4
×4
×2
×2
×3
×3
×2
×2
×2
×2
×3
×3
×6
×3
×16
×2
5
×2
×2
×6
×2
4
7
10
×2
#124
Switching rotational direction 269
270 Switching rotational direction
Switching rotational direction 271
272 Changeover mechanisms using a switch
Changeover mechanisms using a switch
3
×2×2
×2
×2
×2
×2
×2
×10
×3
×3
×5
×3
×54
5
4
×2×2
×2
×2
×2
×2
×2
#125
Changeover mechanisms using a switch 273
274 Changeover mechanisms using a switch
Changeover mechanisms using a switch 275
276 Changeover mechanisms using a switch
×4
×4×2
×3
×8
×2
×6 ×6
×4
×4
×4
×4
×3
×4
4
×6
×2
×22
×16
×10
6
8
#126
Changeover mechanisms using a switch 277
278 Changeover mechanisms using a switch
3
×2
×2
×2
×2
×2
×2
×17
×3
×3
×2
×2
4
5
×5
×2
×2
×2
×4
×4
7
#127
Changeover mechanisms using a switch 279
280 Changeover mechanisms using a switch
3
×6
×3
×18
×3
×3
4
4
×2
×2
×2
×2
#128
Changeover mechanisms using a switch 281
282 Changeover mechanisms using a switch
Changeover mechanisms using a switch 283
284 Changeover mechanisms using a switch
1 2
3
4
×26
×2
×6
×8
×8
×8
×4
×4
×4
×4×4
×4
×2
×2×2
×2
×2
×2
×26
×10
×5
6
7
3
×5
×4
×5
×9
4
5
#129
Changeover mechanisms using a switch 285
286 Changeover mechanisms using a switch
Changeover mechanisms using a switch 287
288 Transmissions
Transmissions
3
×2
×5
×3
×3
×2
4
5
8
×2
×2
10
#130
Transmissions 289
290 Transmissions
3
×2
×2
×2
×2
×4
×6×4 ×4
×2×2
×2
×19
×3
×3
×3 ×4
4
5
8
9
4
×2
×2
×2
×2
×2
×4
#131
Transmissions 291
292 Transmissions
Transmissions 293
294 Transmissions
3
×2
×2 ×2
×2
×4 ×2 ×2
×2
×2
×18
×6
×3
×2
×2
×2
4
×4
×2
×2
×2
×4×4
×4
6
7
×4#132
Transmissions 295
296 Transmissions
Transmissions 297
298 Transmissions
3
×3×5
×2
×2
×2
×20
×4
×3
×3
×3
×4
×2
×3
×2
×2
7
8
9
×2
×2
×2
4
×4
×2
#133
Transmissions 299
300 Transmissions
3
×2
×6
×4×3
×2×2
×2
×2
×4
×3
4
5
×2×2
6
#134
Transmissions 301
302 Transmissions
Transmissions 303
304 Transmissions
3
×4
×2
×2
×2
×14
×2
×3
×8
×5×44
×2×2
×2
×5
×3
×3
Eight speeds
#135
Transmissions 305
306 Transmissions
Transmissions 307
308 Changeover mechanisms using rotational direction
Changeover mechanisms using rotational direction
3
×2
×2
×2
×2
×2
×2
×2
×2
×2
4
×4
6
#136
Changeover mechanisms using rotational direction 309
310 Changeover mechanisms using rotational direction
×4
×2
×2×3
×3×2
×2
×3
×24 4
#137
Changeover mechanisms using rotational direction 311
312 Changeover mechanisms using rotational direction
×9
×2
×2
×2
×2
×2
×2
×3
×2
×2
×3
×2
4
3×3
×3
×4
#138
Changeover mechanisms using rotational direction 313
314 Parts list
3
4
5
6
7
8
9
10
12
4
8
×2 (×2)
×2 (×2)
×1 (×1)
×6 (×7)
×9 (×9)
×6 (×6)
×9 (×9)
×7 (×7)
×1 (×1)
×1 (×1)
×1 (×1)
×2 (×2)
×0 (×1)
×1 (×1)
×12 (×12)
×4 (×4)
×5 (×5)
×4 (×4)
×2 (×4)
×0 (×2)
×4 (×4)
×2 (×4)
×3 (×3)
Parts list This is the maximum number
of this part needed to build any
single model in this book.
This is the maximum number of this part needed
to build any single model in both volumes
of The LEGO Power Functions Idea Book
(Machines and Mechanisms and
Cars and Contraptions).
Parts list 315
×5 (×5)
×0 (×1)
×5 (×5)
×6 (×6)
×8 (×8)
×2 (×2)
×1 (×1)
×4 (×4)
×6 (×6)
×4 (×8)
×2 (×2)
×6 (×6)
×6 (×6)
×6 (×6)
×4 (×4)
×4 (×4)
×2 (×2)
×2 (×2)
×2 (×2)
×2 (×2)
×4 (×4)
×2 (×2)
×0 (×1)
×4 (×4)
×0 (×1)
×0 (×2)
×2 (×2)
×0 (×1)
×2 (×2)
×92 (×92)
×98 (×98)
×58 (×58)
×2 (×2)
×2 (×2)
×0 (×2)
×0 (×6)
×0 (×1)
×1 (×1)
×1 (×1)
×1 (×2)
×0 (×1)
×1 (×2)
×2 (×2)
×6 (×6)
×8 (×8)
×9 (×9)
×2 (×4)
×0 (×1)
316 Parts list
×1 (×1)
×1 (×1)
×4 (×4)
×12 (×12)
×7 (×9)
×42 (×42)
×1 (×1)
×4 (×4)
×10 (×10)
×0 (×2)
×6 (×6)
×0 (×2)
×14 (×14)
×5 (×5)
×2 (×4)
×2 (×2)
×3 (×4)
×2 (×3)
×0 (×1)
×0 (×2)
×1 (×2)
×4 (×4)
×1 (×4)
×18 (×18)
×22 (×22)
×20 (×20)
×26 (×26)
×0 (×8)
×2 (×4)
×0 (×4)
×8 (×8)
×4 (×4)
×10 (×10)
×8 (×8) ×13 (×13)
×13 (×13)
×4 (×9)
×4 (×4)
×3 (×3)
×2 (×2)
×6 (×6)
×0 (×2)
×1 (×4)
×0 (×1)
×0 (×2)
×1 (×2)
×5 (×5)
×4 (×4)
×1 (×1)
×0 (×1)
×2 (×3)
×4 (×8)
×4 (×10)
×4 (×10)
×4 (×4)
×0 (×2)
×6 (×10)
×4 (×4)
×4 (×4)
×8 (×8)
Parts list 317
×16 (×16)
×4 (×6)
×10 (×10)
×6 (×7)
×6 (×6)
×4 (×4)
×10 (×10)
×6 (×8)
×4 (×4)
×4 (×4)
×2 (×2)
×2 (×2)
×0 (×2)
×2 (×5)
×0 (×4)
×4 (×4)
×2 (×2)×4 (×4)
×2 (×2)
×6 (×6)
×2 (×2)
×4 (×4)×0 (×1)
×0 (×3)×0 (×2)
×2 (×2)
×0 (×2)
×2 (×2)
318 Parts list
×2 (×2)
×0 (×2)
×2 (×4)
×2 (×2)
×1 (×2)
×4 (×4)
×2 (×2)
×0 (×4)
×0 (×2)
×1 (×1)
×0 (×2)
×0 (×1)
×1 (×1)
×1 (×1)
×0 (×2)
×1 (×1)
×1 (×1)
×0 (×1)
×0 (×2)
×0 (×3)
×1 (×1)
×0 (×10)
×0 (×1)
×3 (×3)
×0 (×2)
T H E F I N E S T I N G E E K E N T E R TA I N M E N T ™
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This second volume of The LEGO ® Power Functions Idea Book, Cars and Contraptions, showcases small projects to build with LEGO Technic gears, motors, gadgets, and other moving elements. You’ll find hundreds of clever, buildable mechanisms, each one demonstrating a key building technique or mechanical principle.
You’ll learn to build four-wheel drive cars, adorable walking ‘bots, steerable tanks, robotic inchworms, and cars that can follow the edge of a table!
Each model includes a list of required parts and colorful photographs that guide you through the build without the need for step-by-step instructions. As you build, you’ll explore the principles of gear systems, power translation, differentials, suspensions, and more. cars and
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ImagIne. Create. Invent. now, what wIll you buIld?
yoshIhIto Isogawa
is a LEGO luminary with 46 years of building
experience. In addition to running Isogawa
Studio, Inc., he regularly holds LEGO work-
shops, lectures at schools and
science museums, and creates
LEGO models for events and
exhibitions. He is the author of the LEGO® Technic Idea
Book series and The LEGO® MINDSTORMS® EV3 Idea Book
(No Starch Press), as well as many Japanese-language
LEGO titles.
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