Category Archives: robots hacks

Delta Bot Plucks Out Tunes on a Mandolin

Is there no occupation safe from the scourge of robotic replacement? First it was the automobile assemblers, then fast food workers, and now it’s the — mandolin players?

Probably not, unless [Clayton Darwin]’s mandolin playing pluck-bot has anything to say about it. The pick-wielding delta-ish robot can be seen in action in the video below, plucking out the iconic opening measures of that 70s prom-theme favorite, “Colour My World.” The robot consists of two stepper motors connected to a hinged wooden arm by two pushrods. We had to slow the video down to catch the motion, but it looks like …read more

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Posted in delta, kinematics, mandolin, musical hacks, pick, plectrum, robots hacks, stepper, string instrument | Leave a comment

Smooth Moves from Cheap Motors

Building an electric motor isn’t hard or technically challenging, but these motors have very little in the way of control. A stepper motor is usually employed in applications that need precision, but adding this feature to a motor adds complexity and therefore cost. There is a small $3 stepper motor available, but the downside to this motor is that it’s not exactly the Cadillac of motors, nor was it intended to be. With some coaxing, though, [T-Kuhn] was able to get a lot out of this small, cheap motor.

To test out the motors, [T-Kuhn] built a small robotic arm. …read more

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Posted in arm, cheap, controller, ESP32, inverse kinematics, motor, robot, robots hacks, stepper | Leave a comment

Robot Never Misses Leg Day

We have heard bipedal walking referred to as a series of controlled falls, or one continuous fall where we repeatedly catch ourselves, and it is a long way to fall at 9.8m/s2. Some of us are more graceful than others, but most grade-schoolers have gained superior proficiency in comparison to our most advanced bipedal robots. Legs involve all kinds of tricky joints which bend and twist and don’t get us started on knees. Folks at the Keio University and the University of Tokyo steered toward a robot which does not ride on wheels, treads, walk or tumble. The …read more

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Posted in ameoba, bio-inspired, Biomimetics, biomimicry, mimic, news, organism, robot, robots hacks, single-cell | Leave a comment

Welding Robot Takes on a Hot, Dirty, Dangerous Job

They used to say that robots would take over the jobs too dirty or dangerous for humans. That is exactly what [Joel Sullivan] had in mind when he created this welding robot. [Joel] designed the robot for the OSB industry. No, that’s not a new operating system, it’s short for Oriented Strand Board. An engineered lumber, OSB is made of strands (or chips) of wood. It’s similar to plywood but doesn’t require large thin sheets of lumber. To make a panel of OSB, a 5-inch thick matt of wood chips is mixed with glue and compressed down to 5/16″ at …read more

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Posted in lumber, oriented strand board, osb, robotics, robots hacks, welder, welding | Leave a comment

SMORES Robot Finds Its Own Way To The Campfire

Robots that can dynamically reconfigure themselves to adapt to their environments offer a promising advantage over their less dynamic cousins. Researchers have been working through all the challenges of realizing that potential: hardware, software, and all the interactions in between. On the software end of the spectrum, a team at University of Pennsylvania’s ModLab has been working on a robot that can autonomously choose a configuration to best fit its task at hand.

We’ve recently done an overview of modular robots, and we noted that coordination and control are persistent challenges in this area. The robot in this particular demonstration …read more

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Posted in Dtto, modlab, modular robot, modular robotics, robotics, Robotics Module, robots hacks, SMORES, U Penn, university of pennsylvania | Leave a comment

Low-cost Autonomous Rover will Drive your Projects

[Miguel] wanted to get more hands-on experience with Python, so he created a small robotic platform as a testbed. But as such things sometimes go, it turns out the robot he created is a worthy enough project in its own right.

There’s nothing wrong with starting a project just for the experience of it. It’s an excellent way to learn about hardware or software you’ve been meaning to gain some practical experience with, and if you end up having a bit of fun along the way, even better. Getting too bogged down on the “why” can sometimes get in the …read more

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Posted in autonomous, HC-SR04, obstacle avoidance, python, Raspberry Pi, robot, robots hacks | Leave a comment

Robot + Trumpet = Sad Trombone.mp3

[Uri Shaked] is really into Latin music. When his interest crescendoed, he bought a trumpet in order to make some energetic tunes of his own. His enthusiasm flagged a bit when he realized just how hard it is to get reliably trumpet-like sounds out of the thing, but he wasn’t about to give up altogether. Geekcon 2018 was approaching, so he thought, why not make a robot that can play the trumpet for me?

He scoured the internet and found that someone else had taken pains 20 years ago to imitate embouchure with a pair of latex lips (think rubber …read more

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Posted in air pressure, latex lips, musical hacks, robots hacks, servo, trumpet | Leave a comment

Teardown: Sony’s New Aibo goes Under the Knife

In a complete surprise, Sony has moved to release the latest version of their robotic dog series, Aibo, in North America. The device is already out in Japan, where there are a number of owner’s clubs that would rival any dedicated kennel club. Thanks to the [Robot Start] team, we now have a glimpse of what goes into making the robotic equivalent of man’s best friend in their teardown of an Aibo ERS-1000.

According to Yoshihiro of Robot Start, Aibo looks to be using a proprietary battery reminiscent of the Handycam camcorders. Those three gold contacts are used for charging …read more

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Posted in Aibo, electomechanical, robots, robots hacks, sony, teardown | Leave a comment

SandBot Happily And Tirelessly Rolls Patterns In Sand

The patience and precision involved with drawing geometric patterns in sand is right up a robot’s alley, and demonstrating this is [rob dobson]’s SandBot, a robot that draws patterns thanks to an arm with a magnetically coupled ball.

SandBot is not a cartesian XY design. An XY frame would need to be at least as big as the sand table itself, but a SCARA arm can be much more compact. Sandbot also makes heavy use of 3D printing and laser-cut acrylic pieces, with no need of an external frame.

[rob]’s writeup is chock full of excellent detail and illustrations, …read more

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Posted in ball bearing, drawbot, laser cut, robots hacks, sand, sand lines, sandbot, scara | Leave a comment

Hybrid Robot Walks, Transforms, And Takes Flight

[Project Malaikat] is a 3D printed hybrid bipedal walker and quadcopter robot, but there’s much more to it than just sticking some props and a flight controller to a biped and calling it a day. Not only is it a custom design capable of a careful but deliberate two-legged gait, but the props are tucked away and deployed on command via some impressive-looking linkages that allow it to transform from walking mode to flying mode.

Creator [tang woonthai] has the 3D models available for download (.rar file) and the video descriptions on YouTube contain a bill of materials, but beyond …read more

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Posted in biped, cc3d, cc3d atom, drone hacks, flight controller, malaikat, robot, robots hacks, Transformers (Sci-Fi), walking, walking robot | Leave a comment