gzumwalt
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My basement in Oklahoma, US
Joined February 1st, 2017
246
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Our grandkids keep me busy!
Greg Zumwalt
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Instructables (246)
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Discussions (1.5K)
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Chop Saw Stop Block
2
264
Inductive Angel Tea Lamp
2
257
Windup Animated Christmas Music Box
24
1.5K
Angel Tea Light
82
Lighted Christmas Tree, 2025
1
373
Marblevator Christmas Tree, 2025
52
3.5K
Marblevator, Halloween 2025.
2
553
Marblevator, Rube Goldberg Style, II
3
487
Runaway Escapement Mechanism With Optional Windup Car
29
3.3K
Marblevator, Keychain.
321
Marblevator, Rube Goldberg Style.
70
9.9K
Marblevator, Buckets.
83
7.1K
Marblevator, Striker
7
1.1K
Executive Desktop Toy 2
341
Executive Desk Toy
3
816
Marblevator, My Fastest Yet.
3
878
Marblevator, Take the Stairs!
1
760
Two Bar Vertical Lift, Water Feature.
43
4.4K
Two Bar Vertical Lift
43
5.2K
Happy Valentines Day 2025!
2
579
Marblevator, Marbles Go Round or Back and Forth?
130
22K
Marblevator, Rotary Wave.
8
911
Hula Hooper
34
4.2K
The Grinch's Christmas Tree.
8
881
Snake in a Basket
22
3.8K
Darth, Pumpkin.
1
863
Whirligig, Hummingbird.
13
1.5K
Whirligig, Butterfly.
15
1.4K
Whirligig, Pterodactyl.
59
6.0K
A "Honeydew" Towel Hook
1
359
Self Reversing Screw Mechanism, Walking!
15
1.7K
Self Reversing Screw Mechanism, Slinky!
33
6.4K
Marblevator, Self Reversing Screw Lift.
41
4.5K
Piranha Plant
40
2.9K
Geneva Clock
165
14K
Penguin on Ice
56
6.0K
Marblevator, Loop 2.
55
5.2K
Marblevator, Marble Launch Mechanism.
2
1.5K
Christmas Tree, 2023.
10
1.8K
Marblevator, Simple, Halloween
3
790
Marblevator, Less Simple, Less PLA.
39
3.3K
Marblevator, Simple.
132
11K
Pinwalker Penguin
7
1.7K
Penguin at the Pole.
22
2.8K
A "Do Nothing" Dominoes Box.
58
5.3K
Marblevator, Clown.
13
2.3K
Marblevator, Floating Tracks.
7
749
Marblevator, Tracks.
20
2.3K
A Playing Card Holder for Lora.
7
825
Marblevator, Line Follower.
47
6.7K
Marblevator, Emoji.
23
2.0K
Marblevator, Grippers
61
6.0K
Marblevator, Hill Climb (and Descent)!
14
2.3K
Marblevator Pick and Place, Version 4.
162
10K
A Case and Calculator for the Lilygo T-Display-S3 Touch Development Board.
7
3.3K
Marblevator, Paddle Lift.
109
8.8K
For My Valentine, 2023.
16
1.9K
T-Display-S3 NTP Clock
12
6.8K
A Simple 3D Printed Whitworth Quick Return Mechanism
9
1.9K
A Simple 3D Printed Scotch Yoke Mechanism.
9
3.1K
A 3D Printed Kinetic Marble Machine.
162
14K
A 3D Printed Dancing Snowman
9
1.6K
A 3D Printed Dancing Christmas Tree
7
1.7K
Marblevator, Clouds.
39
4.4K
A 3D Printed Windup Car Using a "Runaway Escapement" Speed Regulator.
86
8.6K
Marblevator, "The Ferris Wheel at the Pumpkin Patch"
49
4.1K
A 3D Printed Slinky Machine
74
6.0K
Marblevator, Golf
51
4.9K
A New Marblevator.
21
2.1K
Marblevator, Pick and Place, Version 3
85
6.7K
Marblevator, Pick and Place, Version 2.
94
8.5K
Marblevator, Perpetual?, Cradle.
70
7.4K
Marblevator, Perpetual?, Version 2.
132
11K
Marblevator, Pick and Place
203
15K
"Walk N' Roll!"
67
9.3K
Sink Stopper
773
Wacky Walker
108
9.6K
Crayon Car Mechanism.
138
14K
Butterfly Automaton
89
7.5K
Marblevator, Caterpillars
78
7.4K
Marblevator, Perpetual?
136
14K
MicroWave
59
5.4K
Marblevator, Wave
161
33K
Valentine Heart Pinwalker.
31
5.1K
A 3D Printed GT2 Profile TPU Belt With PLA Sprockets.
19
7.5K
Marblevator, Circus
115
10K
Rack and Pinion, 3 to 1 Stroke.
100
12K
Marblevator, Halloween.
11
1.9K
Marblevator, Christmas Tree.
36
7.0K
Marblevator, Wheel and Spirals
5
1.1K
Marblevator, Spiral Disk.
40
3.1K
Marblevator, Spirals.
11
1.8K
Marblevator, Wheels, Vertical
51
4.8K
Marblevator, Wheels
16
1.7K
A 3D Printed Seven Segment Electro-Mechanical Single Motor Driven Display.
121
9.9K
A 3D Printed Balloon Powered "Jet" Car With Inflator.
43
4.2K
3D Printed Rope Puzzler
19
2.7K
Darth 3.0: a 3D Printed Animated Darth Vader Helmet.
72
11K
A 3D Printed Simple Mechanical Frog 2.0.
9
2.2K
A 3D Printed Simple Mechanical Frog.
1
1.7K
A (mostly) 3D Printed Air Pump.
16
7.9K
Darth 2: a 3D Printed Animated Darth Vader Helmet.
166
37K
A 3D Printed Animated Valentine Heart for My Valentine!
208
17K
A 3D Printed Snake Automaton.
116
14K
3D Printed "Pegs and Jokers" Game.
12
3.7K
3D Printed Christmas Billboard.
60
15K
A 100% 3D Printed Linear Snap Action Mechanism.
124
27K
A 3D Printed Animated Angel Christmas Tree Topper.
16
4.7K
Last Date.
8
3.9K
Cycloidal Disk Electro Mechanical Timer.
41
6.6K
Designing a 3D Printable Hexagonal "Twisty Vase" Using FreeCAD.
1
2.7K
FreeCAD Design of the Base of My "Refrigerator Rover" Model.
4
1.8K
Refrigerator Rover
31
4.1K
Designing a Simple 3D Printed Rubber Band Car Using FreeCAD
10
3.3K
A Simple 3D Printed "Walking" Mechanism.
110
11K
"Bolt Box", a Simple to Print But Hard to Solve 3D Puzzle
31
4.7K
A Trio of "Keychain Puzzles".
60
5.0K
"Rarity", a 3D Printed Automaton
80
6.5K
Levitation, a 3D Printed Automaton Illusion.
58
9.6K
"Lora and I", a Simple 3D Printed Automaton.
12
3.9K
Life Is a (Boundless Supply Of) Cabernet!
20
3.2K
3D Printed Magnetic Tensegrity Model
25
3.5K
3D Printed "Tensegrity" Model
18
4.7K
The "Calamari Kid".
130
14K
Mac N' Cheese
107
10K
The "Magic Chef", a 3D Printed Automata.
75
10K
Geared Heart Version 2.0
61
9.4K
How I Designed a 3D Printable Valentine Heart Gift Box Using Autodesk Fusion 360
2
4.8K
"Batman" Themed Picture Frame
1
1.8K
"No Fall" Toy Mechanism
128
12K
Robotic Nutcracker Pin Walker
37
13K
Robotic Cam Steered Vehicle
50
5.4K
Robotic Christmas Teapot Multi-Color With Single Extrusion
798
Robotic Christmas Teapot
11
3.7K
Hopper.
70
8.4K
Carousel II
14
3.9K
The "Nuts and Bolts" of How I Design, 3D Print and Prepare Nuts and Bolts.
16
8.1K
Snowman Pin Walker
10
3.0K
Motorized, Articulated T Rex(ish) Pin Walker
211
19K
Autodesk Fusion 360 Parametric Table
38
11K
Happy Halloween "Somewhat Stretchy" Bracelet.
1.1K
Marblevator, Magnetic Tracks
90
7.6K
Halloween Happy Ghost Pin Walker.
22
3.4K
Ultimaker Robot "Pin Walker".
22
4.4K
RIP Skeleton
54
11K
Walking Pumpkin II
27
6.2K
Fab Lab Tulsa Trophy and Dancing Robots
32
5.4K
Pink and Green Domino Machine II
233
30K
Six Medals.
1
1.6K
Designing a Cosplay Dagger Using Autodesk Fusion 360.
1
2.3K
Hummingbirds.
94
17K
3D Printed Bowl
2
2.8K
Simple Ball Bearing Car
44
6.4K
3D Printing Maker Design Lab's Silhouette Vase.
17
2.8K
Three Candles
2
1.6K
Inductive Candle
82
19K
How I Designed a Simple Threaded Container With Autodesk Fusion 360.
10
5.9K
3D Printed Print in Place Plate Holder
8
7.2K
DuckBunny
10
2.6K
Perpetual Motion Da Vinci Style IV
36
5.1K
Perpetual Motion Da Vinci Style III
83
11K
Perpetual Motion Davinci Style II
166
21K
ESP32 NTP Temperature Probe Cooking Thermometer With Steinhart-Hart Correction and Temperature Alarm.
56
16K
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
20K
Designing a Simple 3D Printed Rubber Band Car Using Autodesk Fusion 360
116
22K
Windup Bunny 2 With a PLA Spring Motor and Floating Pinion Drive
41
4.9K
Floating Pinion Demonstrator 2
16
4.3K
PLA Spring Motor Demonstrator 2
74
13K
Geared Heart Message Pendant
25
3.5K
Parametric Print in Place Hinge
33
18K
Valentine Heart Pendant
999
Designing a Parametric Parametric "Print in Place" Hinged Container
303
27K
Darth
70
23K
Ping Pong Popper
90
10K
Digital Auto Correcting Clock With Chimes and Daylight Savings Time
17
2.8K
3D Printed Mantel Style Auto Correcting Clock With Chimes and Daylight Savings Time
43
7.2K
3D Printed Snowman Tea Light
3
1.1K
Stepper Motor Test Fixture
17
10K
'Antique' Auto Correcting Analog Clock
46
7.3K
Bell Ornament With Stand
13
1.7K
Simple Secret Box V: Gift Box Edition
33
5.0K
Animated & Illuminated Happy Ghost
42
5.5K
Tea Light Ghost Lamp
3
1.5K
Simple Secret Box IV: Jack O'Lantern Coin Box
15
2.7K
Red Baron II: Hand Launched Biplane Glider
56
5.9K
Simple Secret Box II: Coin Bank
43
8.0K
Red Baron Hand Launched Glider
48
6.3K
Complaint Button II: Hammer Time
65
7.3K
WiFi Propeller Boat II
71
6.7K
3D Printed Replacement Lamp Knob
1
3.1K
WiFi Propeller Boat
69
7.3K
Ping Pong Trophy
1
2.6K
WiFi Paddle Boat.
202
24K
Fab Lab Tulsa 1 (FLT1)
89
8.1K
Fab Lab Tulsa Paddle Boat
3
1.6K
Apple Coin Bank
33
5.2K
Marblevator Mini, Loop.
183
15K
Marblevator, Mechanisms.
30
6.8K
Complaint Button.
91
12K
Horse, Prototype
164
21K
Hummingbird 25mm Motor Adapter
6
2.2K
Hummingbird
368
58K
Best Dressed Leprechaun Trophy
1.9K
XOXO
1.0K
WiFi Kit 32 NTP Clock
46
29K
Heltech WiFi Kit 32 Based Network Scanner
27
17K
Money Maker!
131
26K
Santa Sleigh, Wifi Edition
3
2.6K
Motorized WiFi Controlled Chassis
52
6.0K
Model Aircraft Styled Air Engine, Experimental
35
9.5K
Lady Buggy, WiFi Edition
76
7.6K
3D Printed "Wobbler" Style Air Engine
34
6.6K
Intelligrill®, Powered by Feather.
94
10K
Scissor Jack O'Lantern
27
2.4K
Pseudo Secret Ring Box
25
3.6K
Single Cylinder Air Engine, Experimental
107
11K
Four Cylinder Air Engine, Experimental
163
20K
Flying Pumpkin (Balloon)
46
7.9K
Ballerina in Petals
22
4.7K
Butterfly, Animated.
101
10K
Lora's Giraffe
3
1.5K
Bantam Biplane
9
1.1K
Marblevator Air
137
11K
Pterodactyl, Pseudo Style
80
5.9K
Perseverance Petite, Motorized
26
3.7K
Perseverance, Petite
92
8.4K
SS OhNo
14
3.2K
Two Balancing Bats
9
2.0K
From the Earth to the Moon
9
3.2K
Saber 2
88
10K
The Design of "Cylinder Notes MHALL.stl".
37
3.1K
Two Air Pumps
61
8.8K
Four Whistles Version 2
231
21K
Balloon Powered Single Cylinder Air Engine Open Chassis
107
11K
Four Whistles
36
5.5K
Balloon Powered Single Cylinder Air Engine Toy Train
103
13K
Single Cylinder Air Engine Balloon Powered Rolling Chassis
273
64K
Dual Mode Windup Car
190
21K
Pencil Puzzler Revisited
120
34K
Single Cylinder Air Engine Smaller Edition
42
8.4K
Marblevator Baby Steps Revisited
37
4.8K
Tabletop Pull Back Tri-Mode Spring Motor Rolling Chassis
191
20K
Single Cylinder Air Engine
277
33K
Twin Tops
18
2.6K
A Message From the Heart
18
1.8K