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17 Articles

Robotic Ball Bouncer Uses Machine Vision To Stay On Target

March 5, 2020 by 20 Comments

When we first caught a glimpse of this ball juggling platform, we were instantly hooked by its appearance. With its machined metal linkages and clear polycarbonate platform, its got an irresistibly industrial look. But as fetching as it may appear, it’s even cooler in action.

You may recognize the name [T-Kuhn] as well as sense the roots of the “Octo-Bouncer” from his previous juggling robot. That earlier version was especially impressive because it used microphones to listen to the pings and pongs of the ball bouncing off the platform and determine its location. This version went the optical feedback route, using a camera mounted under the platform to track the ball using OpenCV on a Windows machine. The platform linkages are made from 150 pieces of CNC’d aluminum, with each arm powered by a NEMA 17 stepper with a planetary gearbox. Motion control is via a Teensy, chosen for its blazing-fast clock speed which makes for smoother acceleration and deceleration profiles. Watch it in action from multiple angles in the video below.

Hats off to [T-Kuhn] for an excellent build and a mesmerizing device to watch. Both his jugglers do an excellent job of keeping the ball under control; his robotic ball-flinger is designed to throw the ball to the same spot every time.

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ArrBot Is A Fast Way To Get Out Standing In A New Field Of Robotics

December 14, 2019 by 19 Comments

[Junglist] correctly points out that agricultural robotics is fast on its way to being the next big thing (TM) and presents his easy to build ArrBot platform so others can get hacking fast. 

The frame is built out of the same brackets and aluminum tubing used to add handrails to stairwells on buildings. Not only is this a fast way to do it, the set-up can be guaranteed to be sturdy since hand rails are often literally standing between life and death. The high ground clearance allows for all sorts of sensors and devices to be mounted while still being able to clear the plants below. 

For motion hub motors driven by an ODrive were re-purposed for the task. He explored turning the wheels as well, but it seems like  differential steer and casters works well for this set-up. ROS on an Nividia Jetson runs the show and deals with the various sensors such as a stereoscopic camera and IMU.

We’re excited to see what hacks people come up with as research in this area grows. (Tee-hee!) For example, [Junglist] wants to see the effect of simply running a UV light over a field rather than spraying with pesticides or fungicides would have.

The Demise Of Pebble As A Platform

December 6, 2016 by 62 Comments

Despite owning five, including the original Pebble, I’ve always been somewhat skeptical about smart watches. Even so, the leaked news that Fitbit is buying Pebble for “a small amount” has me sort of depressed about the state of the wearables market. Because Pebble could have been a contender, although perhaps not for the reason you might guess.

Pebble is a pioneer of the wearables market, and launched its first smartwatch back in 2012, two years before the Apple Watch was announced. But after turning down an offer of $740 million by Citizen back in 2015, and despite cash injections from financing rounds and a recent $12.8 million Kickstarter, the company has struggled financially.

An offer of just $70 million earlier this year by Intel reflected Pebble’s reduced prospects, and the rumoured $30 to $40 million price being paid by Fitbit must be a disappointing outcome for a company that was riding high such a short time ago.

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Pips Help Everyone Around The House

July 21, 2016 by 10 Comments

Sometimes you start a project with every intention of using it in a specific way, or maybe your plan is to have a very well-defined set of features. Often, though, our projects go in a completely different direction than we might have intended. That seems to be the case with [Dave] and his Pips. These tiny devices were originally intended to be used by people with disabilities, but it turns out that they’re a perfect platform for this “Internet of Things” thing that we’ve been hearing so much about.

Built around the Bright Blue Bean microcontroller platform to take advantage of its low energy requirements, the Pips were originally intended to be placed around the house where they would light up to remind the user to perform some task. Once the button was pushed, the next Pip in the sequence would activate. While they are quite useful for people with cognitive or sensory impairments, they can also be used in a similar way to the Amazon Dash button or any other simple internet-enabled device. Especially when used in conjunction with a home automation setup, this device could be used in novel ways, such as automating your morning routine without having to add a weight sensor to your bed.

We are also pleased to see that all of the project files are available on GitHub for anyone looking to try this out. Its interesting when something that was originally intended to help out anyone with a disability finds a use somewhere else that it might not have originally been intended for. After all, though, the principle of using things in novel ways is kind of the entire basis of this community.

Atomic Arduino (and Other) Development

April 23, 2016 by 22 Comments

Even the most die-hard Arduino fan boys have to admit that the Arduino development environment isn’t the world’s greatest text editor (they’d probably argue that its simplicity is its strength, but let’s ignore that for now). If you are used to using a real code editor, you’ll probably switch to doing your Arduino coding in that and then use the external editor integration in the IDE.

That works pretty well, but there are other options. One we noticed, PlatformIO, extends GitHub’s Atom editor. That makes it cross-platform, powerful, and with plenty of custom plug ins. It also supports a range of platforms including Arduino, many ARM platforms, MSP430, and even desktop computers running Linux or Windows.

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Snake On A BBC Micro:bit

April 13, 2016 by 35 Comments

The first of the BBC Micro Bits are slowly making their ways into hacker circulation, as is to be expected for any inexpensive educational gadget (see: Raspberry Pi). [Martin] was able to get his hands on one and created the “hello world” of LED displays: he created a playable game of snake that runs on this tiny board.

For those new to the scene, the Micro Bit is the latest in embedded ARM systems. It has a 23-pin connector for inputs and outputs, it has Bluetooth and USB connectivity, a wealth of sensors, and a 25-LED display. That’s small for a full display but it’s more than enough for [Martin]’s game of snake. He was able to create a hex file using the upyed tool from [ntoll] and upload it to the Micro Bit. Once he worked out all the kinks he went an additional step further and ported the game to Minecraft and the Raspberry Pi Sense HAT.

[Martin] has made all of the code available if you’re lucky enough to get your hands on one of these. Right now it seems that they are mostly in the hands of some UK teachers and students, but it’s only a matter of time before they become as ubiquitous as the Raspberry Pi or the original BBC Micro.  It already runs python, so the sky’s the limit on these new boards.

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Top 5 Integrated Development Environments

August 24, 2010 by 185 Comments

So, you want to do some programming but don’t have the budget of a major corporation? This is just the thing for you because all of these development environments are free of charge! Many Integrated Development Environments are marketed towards companies who have money to pay for such expensive environments. Here are the Top 5 Integrated Development Environments that are most widely used and recognized. Some will be used when programming past and future tutorials. The following are listed in no particular order and all make an excellent development environment.

There are alot more IDE’s out there that were not mentioned but should have been.  We have posed the question at Hack A Day Answers “What are your Top 5 IDE’s?” Give us some feedback and we will be back with a revised list from the comments you give us!

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