A few years after we all tire of our remote control BB-8 droids we’ll all have personal human robots designed specifically for human interaction. We’re not there yet, but [Poh Hou Shun] out of Singapore is working on a robot like this for the Hackaday Prize. It’s called OSCAR, the Omni Service Cooperative Assistance Robot.
As with any robotics platform, the use case defines the drive system; you’ll want knobby tires or treads if you’re building a sumo bot, and a strange articulating suspension if you’re driving over alien terrain. OSCAR is built for humans, and this means a humanoid chassis is required. Legs, however, aren’t. Instead of a complex system of motors and joints, OSCAR is balancing on a ball. No, it won’t go up stairs, but neither will many other robots either.
So far, [Poh Hou Shun] has built the basics of a drive system, and it’s surprisingly similar to the BB-8 droids we’re still not tired of yet. On the bottom is a large ball held in place with a spring-loaded retainer. On top of this are three stepper motors, each holding an omni wheel. It will work, there’s no doubt about that, and with the right humanoid chassis, some sensors, and a lot of software, this could be a very cool social robot.
A month before the Bay Area Maker Faire, there were ominous predictions the entire faire would be filled with BB-8 droids, the cute astromech ball bot we’ll be seeing more of when The Force Awakens this December. This prediction proved to be premature. There were plenty of R2 units droiding around the faire, but not a single BB-8. Perhaps at the NYC Maker Faire this September.
Regarding ball bots, we did have one friendly rolling companion at Maker Faire this year. It was a project by UC Davis students [Henjiu Kang], [Yi Lu], and [Yunan Song] that rolls around, seeking out whoever is wearing an infrared ankle strap. They team is calling it Project Naughty Ball, but we’re going to call it the first step towards a miniature BB-8 droid.
The design of the Naughty Ball is somewhat ingenious; it’s set up as a two-wheel balancing bot inside a clear plasic sphere. A ton of batteries work well enough as the ballast, stepper motors and machined plastic wheels balance and steer the ball bot, and the structure on the top hemisphere of the ball houses all the interesting electronics.
There is a BeagleBone Black with WiFi adapter, a few motor drivers, an IMU, and a very interesting 3D printed mount that spins the robot’s eyes – infrared cameras that spin around inside the ball and track whoever is wearing that IR transmitting ankle band.
As far as robotics project go, you really can’t do better at Maker Faire than a semi-autonomous ball bot that follows its owner, and the amount of work these guys have put into this project sends it to the next level. You can check out a video description of their project below.
Yes, the new Star Wars film coming out in December has x-wings, dogfights through the engines of star destroyers, space battles, a dead Jar Jar, and [R2D2]. It will also have the coolest droid yet, [BB-8], the rolling sphere protagonist that will surely be sold as a remote control toy by Christmas 2016.
[James] of XRobots doesn’t want to wait until the [BB-8] toys arrive, so he’s building his own. Right now, it’s just a prototype, but it’s the beginnings of the mechanics and control system of a very, very cool droid.
We’ve seen the first BB-8 droid that was basically putting some magnets on a Sphero robot, but this bot doesn’t exactly have the same functionality of the real-life [BB-8]. The real [BB-8] is actually two parts, a remote control ball-body, and a separate remote-controlled head. [James] is focusing on the head for his prototype, replacing the remote-controlled body with a dummy stand in, a big styrofoam ball.
The head of [James]’ [BB-8] is 3D printed, with some especially clever design features. The electronics are just four DC motors, an Arduino, and some motor drivers. In the future [James] will probably be looking at either steppers or servo motors, but for now his [BB-8] bot can stand up straight and serves as a great platform for testing out control schemes.
All the code and parts are available on Github, with some videos below.
Continue reading “The BB-8 Builds Begin”
Hackaday forum member [machinelou] says he’s been fascinated with remote controlled hamster balls for quite some time. Inspired by a ball bot he saw on a BBC show, he finally picked up a 12″ plastic ball and got to work.
He used a small drill to provide the power required to roll the ball, and an Arduino is used as the brains of the device. This is his first major project outside of simple I/O and servo control, so he’s taking things slowly. While all this is a bit new to him, he already has things up and running to a degree as you can see in the video below. In its current state, the ball is programmed to roll forward and backwards for a few seconds before going back to sleep.
His future plans include adding a servo-controlled weight to allow him to steer the ball as well as using a pair of Zigbee modules in order to control the ball remotely.
It’s a neat little project, and definitely one that would be a fan favorite among kids. Stick around to see a quick video of his bot’s progress thus far.
Continue reading “Ball bot constructed from power tools and pet toys”