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My basement in Oklahoma, US
Joined February 1st, 2017
235
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1,847,467
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Our grandkids keep me busy!
Greg Zumwalt
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Instructables (235)
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Marblevator, Buckets.
3
171
Marblevator, Striker
5
551
Executive Desktop Toy 2
120
Executive Desk Toy
3
478
Marblevator, My Fastest Yet.
3
629
Marblevator, Take the Stairs!
546
Two Bar Vertical Lift, Water Feature.
37
3.9K
Two Bar Vertical Lift
36
4.8K
Happy Valentines Day 2025!
2
494
Marblevator, Marbles Go Round or Back and Forth?
110
11K
Marblevator, Rotary Wave.
5
698
Hula Hooper
32
3.9K
The Grinch's Christmas Tree.
7
631
Snake in a Basket
22
3.6K
Darth, Pumpkin.
1
766
Whirligig, Hummingbird.
12
1.3K
Whirligig, Butterfly.
13
1.2K
Whirligig, Pterodactyl.
58
5.8K
A "Honeydew" Towel Hook
1
287
Self Reversing Screw Mechanism, Walking!
15
1.5K
Self Reversing Screw Mechanism, Slinky!
33
6.1K
Marblevator, Self Reversing Screw Lift.
39
4.2K
Piranha Plant
40
2.8K
Geneva Clock
164
14K
Penguin on Ice
57
5.8K
Marblevator, Loop 2.
54
5.1K
Marblevator, Marble Launch Mechanism.
2
1.4K
Christmas Tree, 2023.
10
1.7K
Marblevator, Simple, Halloween
3
741
Marblevator, Less Simple, Less PLA.
36
3.2K
Marblevator, Simple.
130
11K
Pinwalker Penguin
7
1.5K
Penguin at the Pole.
22
2.7K
A "Do Nothing" Dominoes Box.
57
5.1K
Marblevator, Clown.
13
2.3K
Marblevator, Floating Tracks.
6
658
Marblevator, Tracks.
18
2.2K
A Playing Card Holder for Lora.
7
719
Marblevator, Line Follower.
47
6.6K
Marblevator, Emoji.
22
1.9K
Marblevator, Grippers
60
5.9K
Marblevator, Hill Climb (and Descent)!
14
2.2K
Marblevator Pick and Place, Version 4.
160
10K
A Case and Calculator for the Lilygo T-Display-S3 Touch Development Board.
7
3.0K
Marblevator, Paddle Lift.
109
8.7K
For My Valentine, 2023.
16
1.9K
T-Display-S3 NTP Clock
12
6.4K
A Simple 3D Printed Whitworth Quick Return Mechanism
8
1.6K
A Simple 3D Printed Scotch Yoke Mechanism.
9
2.6K
A 3D Printed Kinetic Marble Machine.
158
14K
A 3D Printed Dancing Snowman
9
1.6K
A 3D Printed Dancing Christmas Tree
7
1.6K
Marblevator, Clouds.
39
4.3K
A 3D Printed Windup Car Using a "Runaway Escapement" Speed Regulator.
84
7.8K
Marblevator, "The Ferris Wheel at the Pumpkin Patch"
49
3.9K
A 3D Printed Slinky Machine
74
5.8K
Marblevator, Golf
51
4.8K
A New Marblevator.
21
2.1K
Marblevator, Pick and Place, Version 3
84
6.5K
Marblevator, Pick and Place, Version 2.
93
8.3K
Marblevator, Perpetual?, Cradle.
70
7.2K
Marblevator, Perpetual?, Version 2.
129
11K
Marblevator, Pick and Place
202
14K
"Walk N' Roll!"
66
9.2K
Sink Stopper
664
Wacky Walker
107
9.4K
Crayon Car Mechanism.
138
14K
Butterfly Automaton
88
7.2K
Marblevator, Caterpillars
77
7.3K
Marblevator, Perpetual?
133
13K
MicroWave
57
5.2K
Marblevator, Wave
159
33K
Valentine Heart Pinwalker.
31
5.0K
A 3D Printed GT2 Profile TPU Belt With PLA Sprockets.
19
6.5K
Marblevator, Circus
114
10K
Rack and Pinion, 3 to 1 Stroke.
99
11K
Marblevator, Halloween.
11
1.9K
Marblevator, Christmas Tree.
35
6.3K
Marblevator, Wheel and Spirals
5
1.0K
Marblevator, Spiral Disk.
39
3.0K
Marblevator, Spirals.
11
1.6K
Marblevator, Wheels, Vertical
50
4.7K
Marblevator, Wheels
15
1.6K
A 3D Printed Seven Segment Electro-Mechanical Single Motor Driven Display.
121
9.4K
A 3D Printed Balloon Powered "Jet" Car With Inflator.
43
4.1K
3D Printed Rope Puzzler
19
2.6K
Darth 3.0: a 3D Printed Animated Darth Vader Helmet.
72
11K
A 3D Printed Simple Mechanical Frog 2.0.
8
2.1K
A 3D Printed Simple Mechanical Frog.
1
1.6K
A (mostly) 3D Printed Air Pump.
16
7.4K
Darth 2: a 3D Printed Animated Darth Vader Helmet.
167
37K
A 3D Printed Animated Valentine Heart for My Valentine!
208
16K
A 3D Printed Snake Automaton.
115
13K
3D Printed "Pegs and Jokers" Game.
12
3.5K
3D Printed Christmas Billboard.
60
15K
A 100% 3D Printed Linear Snap Action Mechanism.
122
26K
A 3D Printed Animated Angel Christmas Tree Topper.
16
4.5K
Last Date.
8
3.9K
Cycloidal Disk Electro Mechanical Timer.
41
6.4K
Designing a 3D Printable Hexagonal "Twisty Vase" Using FreeCAD.
1
2.5K
FreeCAD Design of the Base of My "Refrigerator Rover" Model.
4
1.7K
Refrigerator Rover
30
3.9K
Designing a Simple 3D Printed Rubber Band Car Using FreeCAD
10
3.1K
A Simple 3D Printed "Walking" Mechanism.
110
11K
"Bolt Box", a Simple to Print But Hard to Solve 3D Puzzle
30
4.6K
A Trio of "Keychain Puzzles".
60
4.8K
"Rarity", a 3D Printed Automaton
78
6.3K
Levitation, a 3D Printed Automaton Illusion.
57
9.5K
"Lora and I", a Simple 3D Printed Automaton.
12
3.7K
Life Is a (Boundless Supply Of) Cabernet!
20
3.1K
3D Printed Magnetic Tensegrity Model
25
3.4K
3D Printed "Tensegrity" Model
18
4.4K
The "Calamari Kid".
128
14K
Mac N' Cheese
104
10K
The "Magic Chef", a 3D Printed Automata.
75
9.9K
Geared Heart Version 2.0
61
9.0K
How I Designed a 3D Printable Valentine Heart Gift Box Using Autodesk Fusion 360
2
2.7K
"Batman" Themed Picture Frame
1
1.6K
"No Fall" Toy Mechanism
127
11K
Robotic Nutcracker Pin Walker
37
13K
Robotic Cam Steered Vehicle
50
5.3K
Robotic Christmas Teapot Multi-Color With Single Extrusion
761
Robotic Christmas Teapot
11
3.7K
Hopper.
69
8.2K
Carousel II
13
3.6K
The "Nuts and Bolts" of How I Design, 3D Print and Prepare Nuts and Bolts.
15
7.5K
Snowman Pin Walker
10
3.0K
Motorized, Articulated T Rex(ish) Pin Walker
211
18K
Autodesk Fusion 360 Parametric Table
38
11K
Happy Halloween "Somewhat Stretchy" Bracelet.
1.1K
Marblevator, Magnetic Tracks
90
7.3K
Halloween Happy Ghost Pin Walker.
22
3.3K
Ultimaker Robot "Pin Walker".
22
4.2K
RIP Skeleton
54
11K
Walking Pumpkin II
27
6.0K
Fab Lab Tulsa Trophy and Dancing Robots
32
5.3K
Pink and Green Domino Machine II
233
30K
Six Medals.
1
1.5K
Designing a Cosplay Dagger Using Autodesk Fusion 360.
1
2.2K
Hummingbirds.
94
16K
3D Printed Bowl
2
2.7K
Simple Ball Bearing Car
44
6.1K
3D Printing Maker Design Lab's Silhouette Vase.
17
2.7K
Three Candles
2
1.5K
Inductive Candle
83
19K
How I Designed a Simple Threaded Container With Autodesk Fusion 360.
10
5.6K
3D Printed Print in Place Plate Holder
8
6.6K
DuckBunny
10
2.4K
Perpetual Motion Da Vinci Style IV
36
4.8K
Perpetual Motion Da Vinci Style III
84
10K
Perpetual Motion Davinci Style II
165
21K
ESP32 NTP Temperature Probe Cooking Thermometer With Steinhart-Hart Correction and Temperature Alarm.
54
15K
ESP32 Capacitive Touch Input Using "Metallic Hole Plugs" for Buttons
54
16K
How I Designed a 3D Printed Windup Car Using Autodesk Fusion 360.
111
19K
Designing a Simple 3D Printed Rubber Band Car Using Autodesk Fusion 360
115
22K
Windup Bunny 2 With a PLA Spring Motor and Floating Pinion Drive
41
4.8K
Floating Pinion Demonstrator 2
16
4.1K
PLA Spring Motor Demonstrator 2
74
13K
Geared Heart Message Pendant
25
3.4K
Parametric Print in Place Hinge
33
17K
Valentine Heart Pendant
938
Designing a Parametric Parametric "Print in Place" Hinged Container
305
27K
Darth
70
23K
Ping Pong Popper
90
10K
Digital Auto Correcting Clock With Chimes and Daylight Savings Time
17
2.7K
3D Printed Mantel Style Auto Correcting Clock With Chimes and Daylight Savings Time
43
7.0K
3D Printed Snowman Tea Light
3
1.0K
Stepper Motor Test Fixture
17
9.8K
'Antique' Auto Correcting Analog Clock
46
7.2K
Bell Ornament With Stand
13
1.7K
Simple Secret Box V: Gift Box Edition
33
4.8K
Animated & Illuminated Happy Ghost
42
5.3K
Tea Light Ghost Lamp
3
1.4K
Simple Secret Box IV: Jack O'Lantern Coin Box
15
2.7K
Red Baron II: Hand Launched Biplane Glider
56
5.8K
Simple Secret Box II: Coin Bank
43
7.8K
Red Baron Hand Launched Glider
48
6.1K
Complaint Button II: Hammer Time
65
7.1K
WiFi Propeller Boat II
71
6.5K
3D Printed Replacement Lamp Knob
1
2.9K
WiFi Propeller Boat
69
7.1K
Ping Pong Trophy
1
2.4K
WiFi Paddle Boat.
202
24K
Fab Lab Tulsa 1 (FLT1)
89
8.0K
Fab Lab Tulsa Paddle Boat
3
1.5K
Apple Coin Bank
32
5.1K
Marblevator Mini, Loop.
181
14K
Marblevator, Mechanisms.
28
6.4K
Complaint Button.
91
12K
Horse, Prototype
162
20K
Hummingbird 25mm Motor Adapter
5
2.1K
Hummingbird
363
56K
Best Dressed Leprechaun Trophy
1.8K
XOXO
954
WiFi Kit 32 NTP Clock
46
29K
Heltech WiFi Kit 32 Based Network Scanner
27
17K
Money Maker!
132
25K
Santa Sleigh, Wifi Edition
3
2.5K
Motorized WiFi Controlled Chassis
52
5.9K
Model Aircraft Styled Air Engine, Experimental
34
8.8K
Lady Buggy, WiFi Edition
76
7.4K
3D Printed "Wobbler" Style Air Engine
34
6.5K
Intelligrill®, Powered by Feather.
94
10.0K
Scissor Jack O'Lantern
27
2.3K
Pseudo Secret Ring Box
25
3.5K
Single Cylinder Air Engine, Experimental
105
11K
Four Cylinder Air Engine, Experimental
162
20K
Flying Pumpkin (Balloon)
46
7.8K
Ballerina in Petals
21
4.6K
Butterfly, Animated.
99
9.8K
Lora's Giraffe
3
1.4K
Bantam Biplane
9
1.0K
Marblevator Air
137
11K
Pterodactyl, Pseudo Style
78
5.7K
Perseverance Petite, Motorized
25
3.6K
Perseverance, Petite
92
8.3K
SS OhNo
14
3.1K
Two Balancing Bats
9
1.9K
From the Earth to the Moon
9
3.2K
Saber 2
86
10K
The Design of "Cylinder Notes MHALL.stl".
37
3.1K
Two Air Pumps
60
8.5K
Four Whistles Version 2
229
20K
Balloon Powered Single Cylinder Air Engine Open Chassis
106
11K
Four Whistles
36
5.3K
Balloon Powered Single Cylinder Air Engine Toy Train
103
13K
Single Cylinder Air Engine Balloon Powered Rolling Chassis
272
63K
Dual Mode Windup Car
190
21K
Pencil Puzzler Revisited
120
34K
Single Cylinder Air Engine Smaller Edition
41
8.1K
Marblevator Baby Steps Revisited
37
4.7K
Tabletop Pull Back Tri-Mode Spring Motor Rolling Chassis
189
19K
Single Cylinder Air Engine
274
32K
Twin Tops
18
2.5K
A Message From the Heart
18
1.7K