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Marwa ElDiwiny

@MarwaEldiwiny • 6,441 subscribers

Founder of Sunflower Robotics @sunflowerrobo

Shorts

The hinge mechanism in Samsung’s Galaxy Z Fold2 is an interesting engineering solution. The foldable screen needs a certain amount of curvature; otherwise, the screen can break. The hinge uses a special CAM structure with two ridge-shaped parts that interlock in stages, helping keep the device unfolded for Flex Mode. The Galaxy Z Fold2 also has stronger retention force, keeping the device unfolded at 180° and preventing it from accidentally closing. Because of the larger form factor, the Fold2 uses more CAM structures and springs than the Galaxy Z Flip, while still maintaining a small and intricate design

The hinge mechanism in Samsung’s Galaxy Z Fold2 is an interesting engineering solution. The foldable screen needs a certain amount of curvature; otherwise, the screen can break. The hinge uses a special CAM structure with two ridge-shaped parts that interlock in stages, helping keep the device unfolded for Flex Mode. The Galaxy Z Fold2 also has stronger retention force, keeping the device unfolded at 180° and preventing it from accidentally closing. Because of the larger form factor, the Fold2 uses more CAM structures and springs than the Galaxy Z Flip, while still maintaining a small and intricate design

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Objects with encoded information… auxetic metamaterials.

Objects with encoded information… auxetic metamaterials.

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A Geneva mechanism converts continuous rotary motion into intermittent motion.
0:43
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A Geneva mechanism converts continuous rotary motion into intermittent motion.

Marwa ElDiwiny

4,078,458 views • 3 months ago

Nord-Lock washers use clever geometries to secure nuts and bolts and maintain a steady clamp load
2:21
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Nord-Lock washers use clever geometries to secure nuts and bolts and maintain a steady clamp load

Marwa ElDiwiny

1,333,052 views • 8 months ago

It blows me away to think that in the 18th century, tiny screws could be made by forcing a plain steel rod through a screw plate, such an ingenious manufacturing process.
2:57
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It blows me away to think that in the 18th century, tiny screws could be made by forcing a plain steel rod through a screw plate, such an ingenious manufacturing process.

Marwa ElDiwiny

310,793 views • 2 months ago

I'm curious what happened here..
0:21
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I'm curious what happened here..

Marwa ElDiwiny

324,215 views • 5 months ago

Hahn’s Calculating Machine ... 1770s. It was one of the first calculators to perform arithmetic operations. Hahn’s machine could add, subtract, multiply, and divide, with an 11-digit capacity. Each decimal position was represented by numbered wheels and interconnected gears. The machine used cylinders and stepped drums to carry out calculations... no electricity, no electronics. Only a small number were made because each required immense craftsmanship to build. An incredible piece of 18th-century engineering built entirely with mechanical precision, without CAD or modern manufacturing tools.
1:37
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Hahn’s Calculating Machine ... 1770s. It was one of the first calculators to perform arithmetic operations. Hahn’s machine could add, subtract, multiply, and divide, with an 11-digit capacity. Each decimal position was represented by numbered wheels and interconnected gears. The machine used cylinders and stepped drums to carry out calculations... no electricity, no electronics. Only a small number were made because each required immense craftsmanship to build. An incredible piece of 18th-century engineering built entirely with mechanical precision, without CAD or modern manufacturing tools.

Marwa ElDiwiny

122,859 views • 2 months ago

Ghost Circuits… Machines That Think Without Code. What if intelligence doesn’t come from code at all? Computing comes from the tunability of materials and geometries. I sit down with Thrishantha Nanayakkara to share his journey of writing Ghost Circuits, it took him five years.
2:36
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Ghost Circuits… Machines That Think Without Code. What if intelligence doesn’t come from code at all? Computing comes from the tunability of materials and geometries. I sit down with Thrishantha Nanayakkara to share his journey of writing Ghost Circuits, it took him five years.

Marwa ElDiwiny

202,343 views • 4 months ago

I still find this machine genius... I can't stop thinking about it. The stepped drum, invented by Gottfried Wilhelm Leibniz around 1673, stayed in use for nearly 300 years. A single rotating cylinder with staggered tooth lengths solved the entire problem of variable counting. I was looking for a good animation of the interior mechanism to explain it...this one shows really well how the stepped drum converts the set digit into rotation through its gear-and-drum setup.
1:07
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I still find this machine genius... I can't stop thinking about it. The stepped drum, invented by Gottfried Wilhelm Leibniz around 1673, stayed in use for nearly 300 years. A single rotating cylinder with staggered tooth lengths solved the entire problem of variable counting. I was looking for a good animation of the interior mechanism to explain it...this one shows really well how the stepped drum converts the set digit into rotation through its gear-and-drum setup.

Marwa ElDiwiny

96,185 views • 2 months ago

Passive dynamic stability. Intelligence in mechanism: no sensors, no feedback control.
3:09
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Passive dynamic stability. Intelligence in mechanism: no sensors, no feedback control.

Marwa ElDiwiny

214,344 views • 6 months ago

Rosheim Joint.... a linkage-heavy wrist / spherical joint with a ±90° range of motion, developed in 1989. A brilliant invention by Mark Rosheim, often overlooked, Shoutout to David Kindlon at Apple for bringing this to my attention, must-know for anyone into robotics design!
0:36
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Rosheim Joint.... a linkage-heavy wrist / spherical joint with a ±90° range of motion, developed in 1989. A brilliant invention by Mark Rosheim, often overlooked, Shoutout to David Kindlon at Apple for bringing this to my attention, must-know for anyone into robotics design!

Marwa ElDiwiny

199,600 views • 7 months ago

Claude is ~2 years old now with spatial awareness. The original Cursor idea was CAD autocomplete, but a CAD kernel is fairly complicated, and there’s also a lack of CAD data.
2:42
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Claude is ~2 years old now with spatial awareness. The original Cursor idea was CAD autocomplete, but a CAD kernel is fairly complicated, and there’s also a lack of CAD data.

Marwa ElDiwiny

103,706 views • 6 months ago

Structural engineering portable training system This is such an awesome way to visualize structural stresses (compression, shear, and more) Source:
0:38
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Structural engineering portable training system This is such an awesome way to visualize structural stresses (compression, shear, and more) Source:

Marwa ElDiwiny

81,010 views • 7 months ago

Cams act as the mechanical memory of the machine.. Jacques de Vaucanson realized that by placing hundreds of tiny, precisely shaped cams onto a single rotating cylinder , he could create a complex mechanical code I wish we had been introduced to cams differently back in college
1:31
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Cams act as the mechanical memory of the machine.. Jacques de Vaucanson realized that by placing hundreds of tiny, precisely shaped cams onto a single rotating cylinder , he could create a complex mechanical code I wish we had been introduced to cams differently back in college

Marwa ElDiwiny

59,030 views • 5 months ago

Omni-Wrist VII.. cables replaced with rotating shafts. Singularity-free design. Mark Rosheim
1:06
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Omni-Wrist VII.. cables replaced with rotating shafts. Singularity-free design. Mark Rosheim

Marwa ElDiwiny

58,132 views • 6 months ago

Möbius gears, first time hearing about them. They don’t seem to be used in real products, but I wonder if there are real advantages in this design.
0:26
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Möbius gears, first time hearing about them. They don’t seem to be used in real products, but I wonder if there are real advantages in this design.

Marwa ElDiwiny

71,159 views • 8 months ago

Omni-Wrist IV .. Singularity-free motion. Zero backlash. Mark Rosheim
0:43
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Omni-Wrist IV .. Singularity-free motion. Zero backlash. Mark Rosheim

Marwa ElDiwiny

53,094 views • 6 months ago

1968: Kawasaki brings Unimate to Japan Licensing the American-made first industrial robot and kickstarting Japan’s robotics journey.
1:10
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1968: Kawasaki brings Unimate to Japan Licensing the American-made first industrial robot and kickstarting Japan’s robotics journey.

Marwa ElDiwiny

42,859 views • 7 months ago

Humanoid robots aren’t just an AI problem. A lot of it is a body problem and materials science. My conversation with Jerry Pratt Persona AI .. worth watching if you’re building humanoids.
3:50
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Humanoid robots aren’t just an AI problem. A lot of it is a body problem and materials science. My conversation with Jerry Pratt Persona AI .. worth watching if you’re building humanoids.

Marwa ElDiwiny

31,179 views • 6 months ago

New generation of Constant Velocity Joints from Hoki Joints... Their unique internal geometry reduces friction and minimizes vibration, and the joints are shown via a 3D model in PTC CREO Parametric with kinematic analysis. Interesting to see another player in the joints space!
0:21
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New generation of Constant Velocity Joints from Hoki Joints... Their unique internal geometry reduces friction and minimizes vibration, and the joints are shown via a 3D model in PTC CREO Parametric with kinematic analysis. Interesting to see another player in the joints space!

Marwa ElDiwiny

28,337 views • 7 months ago

The pollen wrist solution, why that’s an elegant design! Hugging Face LeRobot Humanoid Scott
4:58
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The pollen wrist solution, why that’s an elegant design! Hugging Face LeRobot Humanoid Scott

Marwa ElDiwiny

47,909 views • 1 year ago

The Utah/MIT Dextrous Hand ... 1982 A groundbreaking robot hand rarely talked about! Watching this old demo is pure gold!
2:30
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The Utah/MIT Dextrous Hand ... 1982 A groundbreaking robot hand rarely talked about! Watching this old demo is pure gold!

Marwa ElDiwiny

19,495 views • 7 months ago