Engineezy hides a rolling circle beneath eight sliding dots
His mechanical illusion reveals the gears and magnets underneath, while a second upload explains a career-minded detour from Chrome Dino.
Engineezy
Story of Why this story? The channel's weekly summary: what went up this week, what is drawing views now, and where the channel stands among similar channels.
Interesting Mechanical Illusion
A red dot travels back and forth as Engineezy turns a crank. Add the other dots, and a circle seems to roll around the dial, even though each dot follows a straight path. Then he lifts the cover and gives the trick away.
"Interesting Mechanical Illusion," the most watched of his two new uploads, uses a gear rolling inside a ring exactly twice its size. Magnets beneath the solid panel drag the dots along above it. The arrangement is called a Tusi couple: rotational geometry doing something that looks almost suspiciously simple.
The demonstration has drawn about 427,000 views. In the comments, viewers debate the difference between the dots' paths and their rotation, with several suggesting patterned dots to make that movement easier to see. Others want to print a version themselves. Showing the mechanism gives them something more useful than a visual puzzle.
The other upload, "How to find an Engineering job you love," explains a job board Engineezy built while procrastinating on Chrome Dino. He says his first engineering job involved designing golf clubs, a neat example of the connection between an interest and a profession that prompted the project.
Chrome Dino remains the channel's main source of momentum. Its cactus-magazine installment is drawing the most daily views, with the mechanical scoreboard also among the active older uploads. Overall, daily viewing is running at roughly a third of its usual pace, while the subscriber total was unchanged over the week.
That slower spell still brought more weekly views than most nearby DIY channels, with 5MadMovieMakers having a particularly busy week. For Engineezy, the fresh attraction is smaller than a real-life arcade game: a covered gear, a handful of magnets, and straight lines that assemble themselves into a circle.
Published on Trari
Where next?
What viewers say
That's cool that you show how it was built.
@MeowCat-z4ySee it on YouTubeI'd love to 3d print this
@FarawayBrawlHacksSee it on YouTubeThis one's a classic, but I never thought I'd see the inverse of it
@OrangeToad22See it on YouTube
3 more comments
Even though this dot looks like it's moving back and forth in a straight line, it's actually oscillating in a straight line.
@georgedobbs9216See it on YouTubeWould have been nice to see the rotation of each dot by printing a design on it
@imcuredSee it on YouTubeWhen are you going to make another big project in a long video?
@arnverbelen4648See it on YouTube
Public comments from the video's page on YouTube
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The videos drawing views on Engineezy right now
- Channel
- Engineezy
- Subscribers
- 1,370,000
- Channel views, last 7 days
- 2,787,584
- Videos published this week
- 2
- Video published
- October 18, 2026
- Video views so far
- 427,110
- Views on its first day
- 317,299
The numbers
Here is how Engineezy's uploads and audience moved over the past week.
💡 Test your knowledge
What pulls the colored dots across Engineezy's solid panel?
Magnets on the hidden gear drag the dots across the panel as the mechanism turns.