Open Source Tracked Robot Supports STEM In Africa

October 18, 2015 by Al Williams 16 Comments

A lot of hacker projects start with education in mind. The Raspberry Pi, for example, started with the goal of making an affordable classroom computer. The Shrimp is a UK-based bare-bones Arduino targeted at schools. We recently saw an effort to make a 3D printed robotic platform aimed at African STEM education: The Azibot.

Azibot has 3D printed treads, a simple gripper arm, and uses an Arduino combined with Scratch. Their web site has the instructions on how to put together the parts and promises to have the custom part of the software available for download soon.

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Sandy Poems Drawn By A Robot Named Skryf

October 15, 2015 by James Hobson 14 Comments

If you were lucky at the 2015 World Maker Faire you may have stumbled upon strange writings of poetry on the ground — written in sand. While at first confusing, if you followed the poetry along you also caught a glimpse of Skryf, a draw bot by [Gijs van Bon].

The creator was asked to perform poems for a festival about transition and letting go. Naturally, building a robot to write poetry in sand was the downright obvious answer to the question.

I was asked to perform 40 poems during a 10 day festival, and the poems were about transition and letting go. And then I thought the obvious thing to do as an artist is to make a machine that writes those poems with sand. I started writing them, and when the third poem was written, the first one was completely gone, and it was such a beautiful thing.

The robot uses a laptop for input, which is connected to the bicycle carriage. One servo controls the left-to-right movement, and another releases the sand. Forward and back is controlled by the main drive train, which must have been fun to account for (they aren’t servos!)

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The World’s First Android Smartphone

October 8, 2015 by Brian Benchoff 38 Comments

For one reason or another, someone decided smartphones should have personalities. iPhones have Siri, Windows phones have Cortana, but these are just pieces of software, and not a physical representation of a personality. This may soon change with Sharp, with help from famous Japanese roboticist [Tomotaka Takahashi], releasing RoBoHoN, the first robotic smartphone.

RoBoHoN is by any measure a miniature humanoid robot; it can walk on two legs, it can wave its arms, and it can fit into excessively large pockets. This robot is also a phone, and inside its cold soulless chassis is a 2.0″ LCD, camera, pico projector to display movies and pictures on flat surfaces, and the electronics to turn this into a modern, mid-range smartphone.

In the video for RoBoHoN, this friendly little phone can do everything from hail a cab, add stuff to a shopping list, and be the life of the party. According to Akihabara News, Sharp should be releasing this tiny robot sometime in early 2016 but no word yet on price.

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Camera Dolly Uses Makeblock

October 8, 2015 by Al Williams 9 Comments

We’d call it a robot, but [Eric Buijs] calls it a dolly. [Eric] bought a Makeblock starter robot kit last year, but never did anything with it. He recently wanted a camera dolly to help shoot project videos and the Makeblock hardware fit the bill.

[Eric] found that one of Makeblock’s example videos showed off a camera dolly but had no construction details. He cracked open the kit and got to work replicating what he had seen. Two 6V motors combined with a reduction gear, a belt, and some wheels, and the dolly now moves under computer control!

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Robot Cheats At Rock Paper Scissors

October 6, 2015 by Al Williams 15 Comments

It is hard enough to beat computers at games like chess. Now robotics engineers at the Ishikawa Watanabe Laboratory in Japan have created a janken robot that wins every time (if you didn’t know, janken is the Japanese name for rock-paper-scissors). How can it win every time? Easy. It cheats.

The janken robot evolved through three different versions. In the first version, the robotic hand would note the human player’s hand with a high-speed camera and then move the hand to a winning counter play with about a 20 millisecond delay. In the second version, the delay was greatly reduced.

However, in the third version, the robot uses a scanning technique to capture an entire field of view and determines what play the human is making. Again, a winning counter play is instantly produced by the robotic hand.

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Take Your Robots Tubing

October 6, 2015 by Al Williams 16 Comments

When you think of a robot, you might think of one with wheels, tracks, or even legs. But today’s robots are as likely to have wings, props, or even some way to propel it through the water. If you are bored with quadcopters and want to build a water-going robot, you should check out Jalcboat, an open source robot/boat. Although the project is under development, the videos (see below) show that they’ve made a good bit of progress.

As you might expect, 3D printing is a key ingredient and the files are available on Thingiverse linked above. In addition, the robotic boat has a Raspberry Pi onboard to control brushless motors. The main web site is more of a discussion forum and some of it is in Spanish, so you might want to keep Google translate handy.

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Juggling Robot Deftly Handles Balls

October 5, 2015 by Brian Benchoff 22 Comments

A well-designed robot can do any action a human can do. Whether this is an acrobatic performance, or just writing with a pen, there’s a robot out there for any single action a human can perform. This includes juggling, but never before has the human action of juggling been replicated at this scale. [Nathan] built a robot that can juggle seven balls simultaneously. That’s more balls in the air than any other juggling robot.

While the original plan was to build a low-cost version that could juggle balls by throwing them up in the air, this proved to be very difficult. Instead of giving up, [Nathan] simplified the problem by rolling the balls up a ramp. The entire build is documented in an imgur gallery, and there’s some interesting tech going on here. The 3D printed arms are controlled by beefy stepper motors running at 60V. To stop the balls from bouncing around in the arms, [Nathan] included and electromagnet to hold the balls in place for a fraction of a second during each cycle.

Juggling seven balls is amazing, but how about eight? This is the question every builder of a juggling robot will get, and it’s not quite as simple as adding another ball. The motion of juggling an even number of balls is completely different from juggling an odd number. That being said, [Nathan]’s robot does have four balls under its belt. It should probably get that looked at.

This isn’t [Nathan]’s first amazing 3D printed robot, and it probably won’t be the last, either: he recently built a Skittles sorting machine for the next time Van Halen comes to town. There’s an amazing amount of skill in all his projects, and he’s certainly an asset to the entire hackaday.io community.

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