Trinket Everyday Carry Contest Roundup: Sniffing Trinket and Portable Trollmaster 3000!

Hackaday’s  Trinket Everyday Carry Contest is heating up. In just one week we’ve already got over 30 entries! Many of the contenders are completely new open source projects based on the Pro Trinket. Our first drawing will be tonight, at 9pm EST. The first giveaway prize is a BLINK(1) MK2 from the Hackaday store. Make sure you have at least one project log and a photo up to be eligible for this week’s giveaway!

sniffingtrinketWe can’t help but mention how awesome some of the entries are.  [Georg Krocker] is taking on the problem of indoor air quality – not with a central sensor, but with a personal sensor that goes where you do. Sniffing Trinket is designed to monitor the air around the user. If the air quality drops, it will alert the user to open a window – or get the heck out. [Georg] has a few sensors in mind, but he’s starting with the MQ135 gas sensor and a DHT11 temperature/humidity sensor. If air quality starts to drop, 3 WS2812b LEDs will alert the user that there is a problem. The system can also be connected to a PC with USB for more accurate readings and logging.

[Georg] has an aggressive schedule planned, with a custom “Trinket Shield” PCB being laid out and ordered next week. January 2 is fast approaching, so hurry up and get those boards designed!

trololo[Dr Salica] is taking a more humorous approach to personal space. The Portable Trollmaster 3000 is designed to surround its wearer in a bubble of  “I Am Glad, ‘Cause I’m Finally Returning Back Home” aka “The Trololol song” as sung by Eduard Khil. [Dr Salica] plans to pair the Pro Trinket with the popular Sony MMR-70 FM transmitter. The Trinket is capable of playing back short audio clips, so with a bit of I2C magic, [Dr. Salica] will be able to hijack any nearby FM receiver, creating his own personal trollbox.

Do you have an idea for a great wearable or pocketable project? Check out the Trinket Everyday Carry Contest, and get hacking!


Announcing The Trinket Everyday Carry Contest

Now that we’ve recovered from our Munich party and the awarding of The Hackaday Prize, we’re ready to announce our latest contest. We’ve been having a lot of fun with our Trinket Pro boards, both the 10th anniversary edition and the new branded models.  While we were soldering, compiling, and downloading, a contest idea took root. Trinket Pro really excels when used in small projects, the kind which would fit in a pocket. To that end we’re holding the Trinket Everyday Carry Contest, a showcase for small, pocketable projects which are useful everyday. ‘Useful everyday’ is a bit of a broad term, and we intended it that way. Tools are useful of course , but so are jewelry pieces. It’s all in the eye of the builder and users. We’re sure our readers will take this and run with it, as they have with our previous contests.

There are some great prizes in store for the entrants, including a brand new Rigol DS1054Z  oscilloscope! The top 50 entrants will get custom Trinket Everyday Carry Contest T-shirts. Check out the contest page for a full list. 

submit-project-to-trinket-edcWe know you all love to procrastinate with your entries, so we’re going to be offering a few perks to those who enter early and update often. Each week, we’ll throw all the entrants who have published at least one project log full of details into a drawing for a special prize from The Hackaday Store. To be considered you must officially submit your project which is accomplished through a drop-down list on the left side of your project page.

Remember, the contest isn’t just about winning a scope, a meter, or any of the other prizes. It’s about creating new Open Hardware designs that nearly anyone can build. So grab those soldering irons, load up those copies of the Arduino IDE, AVR-GCC, or WinAVR, and get hacking!

You can view the all of the contest entries in this list.

Build a Better Something During the Deconstruction 2014

Couldn’t make it to Detroit for the Red Bull Creation Contest? Its founder, [Jason Naumoff], has a separate event called The Deconstruction and 2014 marks the second year of this lively, worldwide competition.

The Deconstruction is taking place November 14-16th and will be broadcast live online. That’s right, you can participate from anywhere in the world, and your team’s progress will be live streamed from The Omni Commons in Oakland, CA. Registration began October 16th and the friendly competition is absolutely free to enter.

Creativity is the name of this game. The idea is to build something awesome using what you already have access to, including teamwork skills. Ideally, what you build will be a deconstruction of something you’d like to see rethought, though there is no stated topic. There are no age limits, no boundaries, and very few rules. A number of great things came out of last year’s event, more of which you can check out at their site. What are you waiting for? Go show the world how you’d make it better.

Build an Efficient Inverter, Win a Million Dollars

Little Box Challenge

Google and the IEEE are giving away a million dollar prize to an individual or team, that can build the most efficient and compact DC to AC inverter. The goal is to design and build a 2kW inverter with a power density greater than 50W per cubic inch. To put that in perspective, conventional solar string inverters have power densities around 0.5-3W per cubic Inch, and microinverters around 5W per cubic Inch. So in other words, an order of magnitude more efficient than what we have now.

For the challenge, the inverter needs to convert 450VDC, with a 10 ohm series resistor simulating a solar array, to 240VAC @ 60Hz. Testing will consist of powering various resistive, inductive and capacitive loads ranging from 0-2kVA. The inverter is expected to regulate voltage within 5%, and frequency within 0.05%, while keeping the enclosure below 60 degrees C, and conforming to FCC Part 15 B (Unintentional radiators).

If you and/or your team can figure out the most efficient topology, switching frequency, novel use of high power wide bandgap (WBG) semiconductors, physically reduce the size of the input and output filters, and keep the whole thing running cool. Then get registered before the September 30, 2014 deadline. Inverters need to be functional and the results of this test procedure (PDF warning) sent in before July 22, 2015, then 18 finalists will be chosen to bring their inverters in person to a testing facility in the United States by October 21, 2015. The grand prize winner will be announced sometime in January, 2016

[Thanks for the tip Dmytro]

This Arduino power inverter would need a serious upgrade to enter. And speaking of entering challenges, it’s still not too late to enter our very own Hackaday Prize!

Hackaday Reader [David] Wins a Camera from Make and Nikon


Make the shot fixed[David Schwarz] whipped up this moving time-lapse camera rig and won himself a sweet Nikon setup. You might remember our post about the Nikon Make:The Shot Challenge. [David] saw our post, and started thinking about what he wanted to enter. Like a true engineer, he finally came up with his idea with just 3 days left in the contest.

[David] wanted to build a moving time-lapse rig, but he didn’t have the aluminum extrusion rails typically used to build one. He did have some strong rope though, as well as a beefy DC motor with a built-in encoder. [David] mounted a very wide gear on the shaft of the motor, then looped the rope around the gear and two idler pulleys to ensure the gear would have a good bite on the rope. The motor is controlled by an Arduino, which also monitors the encoder to make sure the carriage doesn’t move too far between shots.

[6__pulley_systemDavid] built and tested his rig over a weekend. On Monday morning, he gave the rig its first run. The video came out pretty good, but he knew he could get a better shot. That’s when Murphy struck. The motor and controller on his rig decided to give up the ghost. With the contest deadline less than 24 hours away, [David] burned the midnight oil and replaced his motor and controller.

Tuesday morning, [David] pulled out his trump card – a trip to Tally Lake in Montana, USA. The equipment worked perfectly, and nature was cooperating too. The trees, lake, and the shadows on the mountains in the background made for an incredible shot. Once the time-lapse photos were in the can, [David] rushed home, stitched and stabilized the resulting video. He submitted his winning entry with just 2 hours to spare.

Click past the break for more on [David’s] time-lapse rig, and to see his final video.

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Astronaut Or Astronot: Givin’ Away Scopes

Remember how we said we’d give away an oscilloscope to a random person on if they have voted on projects for The Hackaday Prize? Last week we tried that and no one won. This week we tried it and no one won. Then, because we’re awesome, we picked another person at random on [Rafael] is the winner, with a very nice oscilloscope heading to his doorstep. We’re going to need some contact info, hacker no. 13951, and if anyone has any advice on sending expensive electronics to Brazil, I think we’re going to need it.

We’re doing this again next week, so head on over to and vote. Also, pay no attention to the people who say voting is too hard and complicated and ill planned: they are wrong, and if you suck up enough the Prime Overlord will command that t-shirts and stickers be sent out to you.

Star Wars Training Droid Uses The Force

Star Wars Training Droid

We all know the scene, Obi-Wan Kenobi gives Luke a helmet with the blast shield down. He tells Luke “Your eyes can deceive you. Don’t trust them. Stretch out with your feelings!” Easy for Obi-Wan to say – he doesn’t have a remote training droid flying around and shooting at him. [Roeland] and his team are working to create a real-life version of the training droid for Hackday’s Sci-Fi contest.

The training droid in Star Wars may not have had the Force on its side, but it was pretty darn agile in the air. To replicate this, the team started with a standard Walkera Ladybird micro quadcopter. It would have been simple to have a human controlling the drone-turned-droid, but [Roeland and co] wanted a fully computer controlled system. The Ladybird can carry a small payload, but it just doesn’t have the power to lift a computer and sensor suite. The team took a note from the GRASP Lab and used an external computer with a camera to control their droid.

Rather than the expensive motion capture system used by the big labs, the team used a pair of Wii Remote controllers for stereo vision. A small IR LED mounted atop the droid made it visible to the Wii Remotes’ cameras. A laptop was employed to calculate the current position of the droid. With the current and desired positions known, the laptop calculated and sent commands to an Arduino, which then translated them for the droid’s controller.

Nice work guys! Now you just have to add the blaster emitters to it!

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