LED Cube in an Elongated Cube be Jammin’

LED cube and drive electronics inside an acrylic case

We get a lot of tips about LED cubes. They’re a great build to explore a lot of different things, from the circuit design, to current source and sink, and of course there’s the firmware. Why don’t we see a million of them on the front page? Well, we have seen a lot, but most of what is sent our way doesn’t exhibit such a clean build. It’s obvious that [Justin] took a lot of pride in his work on this 4x4x4 single-color cube.

Hidden away under one of the protoboards is an Arduino that drives it. A lot of the components were salvaged from the e-waste bin at his University. This includes the 12V AC wall wart he uses to power the device. A bridge rectifier converts to DC, and in addition to powering the LEDs there are a couple of USB charging ports. After the break you can see and hear it in action. The cube pulses to the music but the flip of a switch will disconnect the speaker if you want some peace and quiet to go with the light show.

If you’re looking for a challenge, this 8x8x8 RGB offering is several orders of magnitude harder to pull off… block out a lot of extra time if you do decide to take the plunge. We also heard that [Benchoff] might try to make a cube with some of those through-hole ws2812 pixels.

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4-Minutes to Entry

If you think it’s too much work to write about your projects you’re simply wrong, and I’m going to prove it to you.

The first of this set of videos walks though the steps for submitting an official entry… I did it in under 4 minutes.  The second clip covers the extra details you need to post to meet the requirements for the first cutoff on August 20th.

This is the bare minimum needed for your project to be reviewed by the judging panel. But here’s the thing: get your basics down early, then refine as you go along. The Hackaday Prize celebrates the journey of developing interested connected devices. From now until November you should be working on the build and adding to infor to your project post as you go.

Did we mention your odds of winning this thing are really good?

Pwning Timberman with Electronically Simulated Touchscreen Presses

arduino-plays-timerman

What do you do if you suck at a smartphone game? Buy some in-game upgrades to pretend like you’re good? Screw that! [Valentin] did what any self-respecting hacker would: developed an automated system to play for him.

Granted, when you see the demo video embedded below you’ll realize there isn’t much strategy involved in this game. But that setup to simulate the touchscreen presses is pretty neat. We’re used to seeing mechanical touchscreen hacks but this one is electronic, using a couple of pads of copper foil tape and some relays to make it happen. Here’s the one caveat: you still need to be touching something with your hand. This just uses the relays to switch the connection between the pads and your body.

We’ve looked around for this before. Does anyone have a cheap, simple, and effective hack to fully automate presses on a modern touchscreen? Can we use a potato or something? Tell us below, but send it in to the tips line too!

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20,000 Hackers

20k-hackers

What a pleasant thing to wake up and realize that we now have more than 20,000 Hackers on Hackaday.io. It wasn’t even two months ago that we celebrated passing the 10k mark. While we’re talking numbers, how about 2,075 projects, and 148 hackerspaces?

But what’s in a number? It’s what this stands for that really gets us excited! You took the leap and decided to show off what you’re working on while you’re still working on it. This is the key to pollinating ideas. One concept can result in many awesome spin-off projects. So if you haven’t yet written about that killer idea bouncing around in your head, do it now and be the inspiration for the next iteration of amazing hacks.

Much more to come

Our crew has been refining an overhaul of how the feed works to make it easier to know when and how your favorite hackers are updating their builds. You should see that functionality live in August. We’re also working on improving interactivity so that you can better find others with similar interests whether it’s just for casual conversation or to undertake an epic build as a team.

We’re certainly not above pointing out our own weaknesses. The Stack never took off. The idea seemed like a good one, but we need your help figuring out how to make it shine. Leave a comment below telling us what you think The Stack should be and how you think it should work.

Red Bull Creation Winners: Maker Twins

This year’s Red Bull Creation theme “Reinvent the Wheel” was pretty broad, but the Maker Twins managed to incorporate it quite closely with their winning project which was completed in under 72 hours. They took the idea of urban farming and figured out one way to make farmer’s markets more feasible by helping to eliminate waste and spruce up the presentation of the produce.

The project amounts to a Ferris wheel. Instead of passenger compartments there are modular crates which are built with one wooden pallet each. The wheel itself is chain-driven and allows the system to track where each crate is in the rotation. This data is leveraged for a couple of different uses. One lets the customer select their produce on a tablet app and the crate will rotate into position so they may pick the individual items they want. The machine will also take care of automated watering to ensure the produce on display doesn’t get dried out. The icing on the cake is a separate station for washing and cutting the purchased veggies.

Thank you to Maker Twins for contributing some demonstration “b-roll” for use in this video.

New Round of Astronaut or Not: Most Outrageous Component

 

Round 2 Astronaut or Not Voting Results Graph

And so ends round 2 of Astronaut or Not. We asked you to vote for the projects “most likely to be used in other projects”. Again you didn’t disappoint. We had a mountain of votes, and happily gave away a Bukito portable 3D printer to one of the lucky voters.

You must vote at least once in this new round to be eligible for the voter lottery on Friday!

Vote for the project with “the most outrageous component”. Can’t figure out what we mean by that? Well, if you come across an entry that has a quarter-million-dollar hard drive in it… vote for that one.

Voter Lottery Prize:

BK Precision 1760AHow long have you been making do with a hacked together power supply?

Be sure you vote and you could kiss those days goodbye with this BK Precision 1760A bench supply. It has three channels; 0-30V 0-2A on the first two and 4-6.5V 0-5A on the third. We’re also throwing in some leads so that you can be up and running as soon as it arrives.

We’ll draw a random number on Friday morning. If you have voted at least one time in this current round (your participation in previous rounds doesn’t matter) and your hacker number is drawn you will win! But if your number is drawn and you haven’t voted… no bench supply for you.

Now for the results:

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Talking BeagleBoard with [Jason Kridner]

[Jason Kridner] is a member of the i3 Detroit hackerspace and during the Hackaday meet-up we were able to spend a few minutes talking about what’s going on with BeagleBoard right now. For those of you that don’t know, BeagleBoard is a non-profit foundation which guides the open hardware initiative of the same name. This includes BeagleBone which is the third iteration of the platform. [Jason's] a good guy to talk to about this as he co-founded the organization and has been the driving force in the community ever since.

Right now the organization is participating in the Google Summer of Code. This initiative allows students to propose open source coding projects which will help move the community forward. Students with accepted proposals were paired with mentors and are paid for the quality code which is produced. One of the projects this year is a 100 Megahertz, 14-channel Logic Analyzer which [Jason] is waving around in the video. It’s the GSoC project of [Kumar Abhishek] and you can learn more from his proposal.

Also of interest in the video is a discussion about the power of the BeagleBone’s PRUs, or Programmable Real-Time Units. They’re basically unused microcontrollers that have direct access to a lot of the processor’s features and are just waiting for you to bend them to your will. Having these is a huge boon for hardware hackers. If you haven’t played with them before, check out our earlier article on what PRUs are all about and then give it a whirl yourself.

After the break there’s a brief table of contents which maps the topics in the video above.

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