The battle’s are done and the results are in — [AltaPowderDog]’s, aka [Carter Hurd], cardboard and foam armor, lightweight Krave robot beat its metal cousins in 2016 and fared well in 2017. How did a cardboard Krave cereal box and foam board robot do that you ask? The cardboard and foam outer structure was sliced, smashed and generally eaten while the delicate electronics, motors and wheels remained buried safely inside.
We covered the making of his 2016 version but didn’t follow-up with how it fared in that year’s Illinois Bot Brawl competition. As you can see in the exciting first video below, despite suffering repeated severe damage to its armor, it won first place in the 1 lb Antweight category!
Battery and RC receiver
Wheels, motors and speed controller
Finished Krave robot
For 2017 he made another one but managed to halve the weight — and so he made two of them! By starting them both within a twelve-inch by twelve-inch area, they were allowed to fight as a team. How did he make it lighter? Partly it was done by doing away with the ability to lift the metal lip in front, the wheels were reduced from four to two, and a smaller servo was used for opening and closing the mouth. The full build video is shown below along with a video of the 2017 battles wherein he won seventh place.
A couple of months ago, [Mike] started saving bones from all the fried chicken he had been eating. If that’s the opening line, you know it’s going to be good.
This Cyborg Chicken project grew out of [Mike]’s love for battlebots, and an immense dearth of battleborgs. The difference, though small, is distinct: a robot is simply a machine that carries out instructions either automatically or via remote control. A cyborg, on the other hand, contains both organic and biomechatronic body parts. Since [Mike] was saving chicken bones, he stumbled upon the idea of creating a cyborg out of trash, a few servos, an MSP430, and some other parts sitting around in his junk drawer.
A continuation of an earlier remote controlled food project, the capabilities of these chicken battleborgs are about what you would expect: they roll around on wheels and flail their drumsticks wildly. [Mike] has already built at least two of these devices, and the result is accurately described as Rock ’em Sock ’em Borgs. Check out the video below for the action.
On the hardware side of things, [Mike] picked up an MSP430, and whipped up a bit of code in Java. Three billion enterprise computing systems and, now, two cyborg chickens run Java. The motors and drivers come from Pololu, and control is provided over IR with a pair of Atari joysticks.
You can check out the videos of these cyborg chickens below. If you have to ask why, the answer is always, ‘because’.
The idea of purpose is one of great importance to many sentient beings; one can only imagine the philosophical terror experienced by a robot designed solely to pass butter. Perhaps wishing to create a robot with more reason to exist, [Micah “Chewy” Leibowitz] decided to build this battlebot armed with a flamethrower, named Flamewar.
In the video, we see it rather successfully facing off against a robot named T800, at least in the early part of the fight. T800 is armed with a spinning weapon, and while it is able to deliver a heavy thump thanks to stored kinetic energy, more often than not T800 seems to knock itself over rather than do any serious damage to Flamewar. Flamewar is repeatedly able to fire its primary weapon, as the flamethrower is built into its arms, far above the reach of T800’s armament. We won’t spoil the ending of the fight. Video below the break.
“DroneClash” is a competition to be held on December 4th (save the date!) in a hangar at Valkenburg airfield in the Netherlands. The game? Teams try to destroy each others’ quadcopters, navigate through a “Hallway of Doom, Death, and Destruction”, and finally enter a final phase of the game where they try to defend their “queen” drone while taking out those of their opponents.
This sounds like crazy and reckless fun. Surprisingly, it’s being sponsored by the Technical University of Delft’s Micro Air Vehicle (MAV) lab. The goal is to enable a future of responsible drone use by having the ability “to take them out if necessary”.
Drone development has grown hugely in recent years, and you can see the anti-drone industry growing too. Ideally, these developments keep each other in check and result in a safe and responsible incorporation of drones in our daily lives. We are organising DroneClash to generate new ideas in order to encourage this process.
We do have to ask ourselves why anyone would want to use another quadcopter to take out illegally operated quadcopters — there must be a million more effective means from a policing standpoint. On the other hand, if we were re-shooting “Hackers” right now, and looking for a futuristic sport, we would swap out rollerblading for drone combat. Registration opens this week. Gentlebots, start your engines.
I had a great time at Denver’s 3rd annual Mini Maker Faire, which was held inside the Denver Museum of Nature and Science. The official theme this year was “Building the Future” and looking back, I can tell you that they pulled the theme off well. There was a strong turnout in two categories that are crucial to building the future: the growth that comes from education at all ages and the physical places where learning becomes immersive.
The Really Fun Stuff
[Casey] from Caustic Creations were showing off Poison Arrow just in time for season 2 of the BattleBots reboot. Poison Arrow is 250-lb. drum spinner that destroys things at 9,000 RPM. Here’s a nice introductory video shot by their sponsor, Arrow Electronics. [Casey] told me that Poison Arrow will be on the June 30th episode, so set your DVR.
Who knew that Colorado had so many maker- and hackerspaces? Colorado Makerhub, that’s who. They provide a portal to everything maker-related in Colorado, and they were in attendance along with most of the ‘spaces within a 50-mile radius of the city. Denver’s own Denhac brought a huge multiplayer rig that they had built for Comic Con last year. It runs Artemis, a spaceship bridge simulator game that divides up the tasks necessary for successful intergalactic travel. Here’s a video of Denhac member [Radio Shack] describing the game and giving a tour of one of the consoles. The group landed a space in one of the darker areas of the museum, which made the blinkenlights irresistible, especially to boys of a certain age range.
If you want something spinning hard and fast, brushless is where it’s at. Brushless motors offer much better power-to-weight ratios compared to brushed DC motors, but some applications – like a large robot’s drivetrain – are less straightforward than others. One of the biggest issues is control. Inexpensive brushless motors are promising, but as [professor churlz] puts it, “hobby motor control equipment is not well suited for the task. Usually created for model airplanes, the controllers are lightly built, rated to an inch of the components’ lives using unrealistic methods, and usually do not feature reversing or the ability to maintain torque at low speeds and near-stall conditions, which is where DC motors shine.” Taking into account the inertia of a 243 lb robot is a factor as well – the controller and motor want to start moving immediately, but the heavy robot on the other side of it doesn’t. The answer was a mixture of hardware and firmware tweaking with a lot of testing.
Antweight combat robots are really lightweight. [Carter Hurd] used leftover materials to create a dustpan robot with a chomper (comically made from a Krave cereal box) to hold captured competitors in place. The main body is made of foam board. The only metal is in the front wedge which is lifted by a servo to help trap the other robot.
[Carter] fully expects the foam to be eaten by competitors during the match. This led him to position his electronics at the center of the robot to keep it from being damaged. We’ll have to see how well that works. He’s hoping for an advantage over vertical flip weapons since they may simply cut through the foam without getting enough purchase for a flip.
The electronics is on a modular board so it can be easily moved from one robot to another. All that is on the board is the RC receiver and two FingerTech Tiny Electronic Speed Controllers. A battery is slung underneath.
Best of luck for Krave ‘bot eating up the opposition. We’ve seen some other light weight designs in the cardboard competitors from the Columbia Gadget Works makerspace.