By Brian Lesko
Exploring the intersection between asset allocation and engineering.
Non Retirement Portfolio Growth
(just one of my portfolio's)
Hello fellow journeymen,
— Brian Lesko (@TheBrianLesko) March 4, 2025
This weekend, I brushed up on my CAD skills and designed a compact planetary gearbox for 4006 series brushless DC motors. The entire assembly, including the motor, stands at just 4cm tall and delivers an 8:1 gearing ratio for higher torque and finer… pic.twitter.com/O8TQkytnee
Greetings fellow journeymen,
— Brian Lesko (@TheBrianLesko) March 18, 2025
This week, I jumped back into CAD to design a harmonic gear reducer to fit onto the planetary gearbox I made recently. Like last time, the box is designed for 4006 series brushless DC motors, and with the extra reduction jumping twenty fold to… pic.twitter.com/i4V8NagPRg
Fellow Journeymen! This week, I revisited the compact planetary gearbox I designed last weekend. This segment, just 13mm tall, achieves an 8:1 gear ratio. Metal gears are coming soon pic.twitter.com/WzKWhIahUz
— Brian Lesko (@TheBrianLesko) March 11, 2025
ROBOTICS JOURNEYMAN BLESKO REPORTING IN
— Brian Lesko (@TheBrianLesko) February 25, 2025
Massively reduced the turning radius of my wheeled robot thanks to the addition of four wheel steering.
Im using two metal gear servos and a CNC'd fixture bolted to the back bumper. The fit on this fixture is so tight that I didnt feel… pic.twitter.com/7P4DAX5yI4
The simplest robot is just two joints. https://t.co/QJwZ8jq0am pic.twitter.com/ghrExD3kF5
— Brian Lesko (@TheBrianLesko) November 20, 2024
ROBOTICS JOURNEYMEN!
— Brian Lesko (@TheBrianLesko) November 25, 2024
This is my wheeled robot. It will drive itself using the power of a raspberry pi and microcontroller. My first goal is an autonomous steering program.
This week I implemented the depth-pro model released by apple. The idea is to use depth-pro to label video… pic.twitter.com/vIrM6K4SkP
Watch this fast-paced AutoCAD Timelapse where I design a floorplan to renovate a historic 1920's duplex by adding a bathroom in the existing kitchen space. pic.twitter.com/FBnuKyQ8WU
— Brian Lesko (@TheBrianLesko) March 16, 2025
What is your estimate on this remodel?
— Brian Lesko (@TheBrianLesko) February 22, 2025
- House is 42 feet in length 14 feet wide.
- Ohio pic.twitter.com/GIGkZpq3oE
Completed the first-floor layout of my duplex near Ohio State University. This place has great potential as a long-term rental property. Meanwhile, I'll renovate it myself, possibly adding a bathroom or bedroom by reconfiguring the kitchen. https://t.co/g0SEAPkywS pic.twitter.com/af5ng3IA7o
— Brian Lesko (@TheBrianLesko) March 16, 2025
27 degree of freedom human hand vs 12 degree of freedom robotic hand with 4 fingers. pic.twitter.com/WuRZH3mP0q
— Brian Lesko (@TheBrianLesko) August 25, 2025
Roll pitch and yaw thrust vector control with WASD over HTTP. - Longer video pic.twitter.com/8Ng3dx9cpq
— Brian Lesko (@TheBrianLesko) August 19, 2025
How real men do cad https://t.co/Z7tBr9kND5
— kache (@yacineMTB) August 13, 2025
Motion study in fusion360 pic.twitter.com/Z1bzbHAk70
— Brian Lesko (@TheBrianLesko) July 22, 2025
— Brian Lesko (@TheBrianLesko) July 16, 2025
Hello Journeymen,
— Brian Lesko (@TheBrianLesko) May 20, 2025
This week I built a palm for my humanoid finger design. pic.twitter.com/oU1AXAx67W
Updated my landing page for rental property applications this morning pic.twitter.com/ibeNDzRONr
— Brian Lesko (@TheBrianLesko) February 22, 2025
111 simulated vehicles accelerating or braking. Here's the error in each LTI approximation.
— Brian Lesko (@TheBrianLesko) August 10, 2023
I'll use the models for quick and accurate longitudinal velocity control at Ohio State.
Next steps are to automatically interpolate LTI parameters. 🚗🚗🚗
Check out my GitHub portfolio… pic.twitter.com/hv6cixGA8M
View's great from the top of the #kaggle leaderboard. #WishYouWereHere https://t.co/Dndnk3AFYU
— Brian Lesko (@TheBrianLesko) April 25, 2023
Floor 2. It's so over https://t.co/g0SEAPkywS pic.twitter.com/3GfHsu9TNC
— Brian Lesko (@TheBrianLesko) March 23, 2025
Hello fellow robotics enthusiasts,
— Brian Lesko (@TheBrianLesko) March 25, 2025
I spent the afternoon in CAD designing a servo actuated finger for use in a human-like hand. The gear reduction involved allows for a 2:1 increase in force and mimics the range of a human finger joint, about 90 degrees. https://t.co/opJfY0gdRy pic.twitter.com/y4vf5oGZTS
While traveling for work this week, I assembled my design for a humanoid finger. The assembly is mostly 3d printed and features tiny bearings for smooth joint movement and a pair of double helix gears, printed in carbon fiber nylon. pic.twitter.com/ifbCArC5Xn
— Brian Lesko (@TheBrianLesko) April 8, 2025
Hello fellow journeymen,
— Brian Lesko (@TheBrianLesko) April 22, 2025
This week I tested the fit of my planetary gearbox design with 4041 alloy steel gears. https://t.co/tWZqVOujBz pic.twitter.com/8UZsLh9f8V
Bearings are great. With just two, my tiny 8:1 planetary gearbox becomes easily back-drivable. https://t.co/Rfi163Ndr6 pic.twitter.com/TilCmgRgvY
— Brian Lesko (@TheBrianLesko) April 29, 2025
Hello fellow journeymen,
— Brian Lesko (@TheBrianLesko) March 4, 2025
This weekend, I brushed up on my CAD skills and designed a compact planetary gearbox for 4006 series brushless DC motors. The entire assembly, including the motor, stands at just 4cm tall and delivers an 8:1 gearing ratio for higher torque and finer… pic.twitter.com/O8TQkytnee
Greetings fellow journeymen,
— Brian Lesko (@TheBrianLesko) March 18, 2025
This week, I jumped back into CAD to design a harmonic gear reducer to fit onto the planetary gearbox I made recently. Like last time, the box is designed for 4006 series brushless DC motors, and with the extra reduction jumping twenty fold to… pic.twitter.com/i4V8NagPRg
Fellow Journeymen! This week, I revisited the compact planetary gearbox I designed last weekend. This segment, just 13mm tall, achieves an 8:1 gear ratio. Metal gears are coming soon pic.twitter.com/WzKWhIahUz
— Brian Lesko (@TheBrianLesko) March 11, 2025
ROBOTICS JOURNEYMAN BLESKO REPORTING IN
— Brian Lesko (@TheBrianLesko) February 25, 2025
Massively reduced the turning radius of my wheeled robot thanks to the addition of four wheel steering.
Im using two metal gear servos and a CNC'd fixture bolted to the back bumper. The fit on this fixture is so tight that I didnt feel… pic.twitter.com/7P4DAX5yI4
The simplest robot is just two joints. https://t.co/QJwZ8jq0am pic.twitter.com/ghrExD3kF5
— Brian Lesko (@TheBrianLesko) November 20, 2024
ROBOTICS JOURNEYMEN!
— Brian Lesko (@TheBrianLesko) November 25, 2024
This is my wheeled robot. It will drive itself using the power of a raspberry pi and microcontroller. My first goal is an autonomous steering program.
This week I implemented the depth-pro model released by apple. The idea is to use depth-pro to label video… pic.twitter.com/vIrM6K4SkP
Watch this fast-paced AutoCAD Timelapse where I design a floorplan to renovate a historic 1920's duplex by adding a bathroom in the existing kitchen space. pic.twitter.com/FBnuKyQ8WU
— Brian Lesko (@TheBrianLesko) March 16, 2025
What is your estimate on this remodel?
— Brian Lesko (@TheBrianLesko) February 22, 2025
- House is 42 feet in length 14 feet wide.
- Ohio pic.twitter.com/GIGkZpq3oE
Completed the first-floor layout of my duplex near Ohio State University. This place has great potential as a long-term rental property. Meanwhile, I'll renovate it myself, possibly adding a bathroom or bedroom by reconfiguring the kitchen. https://t.co/g0SEAPkywS pic.twitter.com/af5ng3IA7o
— Brian Lesko (@TheBrianLesko) March 16, 2025
27 degree of freedom human hand vs 12 degree of freedom robotic hand with 4 fingers. pic.twitter.com/WuRZH3mP0q
— Brian Lesko (@TheBrianLesko) August 25, 2025
Roll pitch and yaw thrust vector control with WASD over HTTP. - Longer video pic.twitter.com/8Ng3dx9cpq
— Brian Lesko (@TheBrianLesko) August 19, 2025
How real men do cad https://t.co/Z7tBr9kND5
— kache (@yacineMTB) August 13, 2025
Motion study in fusion360 pic.twitter.com/Z1bzbHAk70
— Brian Lesko (@TheBrianLesko) July 22, 2025
— Brian Lesko (@TheBrianLesko) July 16, 2025
Hello Journeymen,
— Brian Lesko (@TheBrianLesko) May 20, 2025
This week I built a palm for my humanoid finger design. pic.twitter.com/oU1AXAx67W
Real Estate Portfolio
10% Cash on Cash Return post renovation
Every complex idea can be broken into straightforward components.
That's why I taught myself to code, and how I made this webpage.
About
Whether it's the linear algebra behind robotics, the psychology of running a family business, or the polymer science at my day job, I optimize for understanding everything from the ground up.
I've always thought college wasn't worth it—you can learn almost anything online for free and faster. But I decided to go for it, earning both bachelor's and master's degrees in Mechanical Engineering from Ohio State.
I got hooked on investing back in high school during a finance class, where I started tracking tech companies like Tesla, Nvidia, and Google. That early start paid off. It helped me buy a rental property during college.
currently being updated.
Contact
Whether it's engineering consulting, real estate guidance, or investment strategy - let's discuss your project.
