Stealth Camper Van

January 23, 2014 by 84 Comments

Sometimes you need to sleep where you’re not supposed to. In this case, [MisterE] wanted to cut the costs associated with his climbing trips. He took a 2001 GMC Savana cargo van and turned it into a stealthy mobile living space. The project is from back in 2008 and we almost waved off from featuring it. But when you start to look at all of the creative space-saving solutions in the hack we think you’ll agree it’s worth a look.

Since he’s a climber that means time in the mountains, which can be quite cold. The sides and floor of the van were insulated to about R19 before the build work itself started and there’s a small wall-mounted heater. For comfort, a fouton was a must for sleeping but also for its double use as a sofa. For style the only choice here was bead-board to cover all of the walls. There is a small kitchenette that is mainly just a sink (we’ve seen running water in vehicles before). A couple of extra batteries power all of the electronics: audio, laptop, etc. When asked, [MisterE] confirms that he added hidden storage areas for his more pricey gear. Total cost on the project came it at $11,500. About nine for the van and the rest for improvements.

He mentions he blew an inverter because of grounding issues while starting the van. As long as he turns it off before start-up he’s fine. Shouldn’t there be a better way to build protection into this? Please leave a comment after the break and let us know what you’d do differently.

[Thanks Mac]

Touring Deezmaker, The First *Good* 3D Printer Store In The World

January 23, 2014 by 24 Comments

When we visited the Crash Space hackerspace earlier this week, it came to our attention we were staying mere blocks away from Deezmaker, a 3D printer store in beautiful Pasadena that is home base for the Bukobot and Bukito printers, an awful lot of awesome printed plastic things, and [Rich] a.k.a [whosawhatsis], creator of the RepRap Wallace and all this stuff. Obviously a tour was in order.

Inside Deezmaker is a treasure trove of printed baubles and a fishbowl full of a herringbone planetary gear systems free for the taking. They have printers running all the time, a very nice lab for [whosawhatsis], and enough work space to host a few workshops every week.

In the video below, [Diego], the big cheese of Deezmaker takes us around the shop showing off his wares. [whosawhatsis] also makes an appearance showing off his latest invention, the Bukito printer. It’s a very small and incredibly portable printer that can be powered by batteries. They’re using a 3-cell 5000mAh lipo battery when they take the Bukito camping. I didn’t catch how long the battery lasts, but it’s more than enough to squirt out a few of the gear systems they give away.

Video after the break.

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The Gathering: Huge Success!

January 23, 2014 by 21 Comments

In case you haven’t heard, Hackaday put on a little shindig in downtown LA this past Tuesday. It was awesome.

And we had a few very awesome visitors: [Eliot], senior editor of Hackaday for the first five years made a showing, as did former co-editor [Jack Buffington]. Eminent LA-area hackers came out, including [charliex] of Null Space Labs, the guys from Deezmaker, and the long-haired hippie who can be found in a few NASA videos for the Curiosity rover.

Aside from the free drinks and the awesome people, there was some really cool tech on display. The mezzanine of the bar had a laser graffiti rig, and everyone who came received a super collectible NFC card that allowed them to vote on what Hackaday is doing for our next main event (the quadcopter option won but the vote was non-binding so we’ll keep you updated).

On a personal note, this was one of the few times I’ve interacted with Hackaday readers without the use of a keyboard. You guys are awesome. Thanks for coming out, and if you have any pics from the party, post a link to an album in the comments, or share your stories with us on Twitter via #HaDLA, Google+, and/or Facebook.

Pics below. These were taken by [Edward de la Torre]

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LIDAR With LEDs For Under $100

January 23, 2014 by 99 Comments

If you need some sort of distance sensor for your robot, drone, or other project, you have two options: a cheap ultrasonic sensor with limited range, or an expensive laser-based system that’s top of the line. LIDAR-Lite fills that gap by stuffing an entire LIDAR module onto a small board.

In traditional LIDAR systems, a laser is used to measure the time of flight for a light beam between the sensor and an object. The very accurate clock and laser module required for this system means LIDAR modules cost at least a few hundred dollars. LIDAR-Lite gets around these problems by blinking a LED with a ‘signature’ and looking for that signature’s return. This tech is packaged inside a SoC that reduces both the cost and size of a traditional laser-based LIDAR system.

As for the LIDAR-Lite specs, it can sense objects out to 40 meters with 5% 95% accuracy, communicates to any microcontroller over an I2C bus, and is small enough to fit inside any project.

Considering the existing solutions for distance measurement for robots and quadcopters, this sensor will certainly make for some very awesome projects.

Edit: One of the guys behind this posted a link to their spec sheet and a patent in the comments

AVR Barn Door Tracker For Astrophotography

January 23, 2014 by 16 Comments

zzjBarnDoorTracker

[ZigZagJoe’s] first foray into astrophotography is this impressive AVR barn door tracker, which steps up his night sky photo game without emptying his bank account. If you’ve never heard of astrophotography, you should skim over its Wikipedia page and/or the subreddit. The idea is to capture images otherwise undetectable by the human eye through longer exposures. Unfortunately, the big ball of rock we all inhabit has a tendency to rotate, which means you need to move the camera to keep the night sky framed up.

Most trackers require precision parts and fabrication, which was out of [ZigZagJoe’s] grasp. Instead, he found a solution with the Cloudbait Observatory model, which as best as we can tell looks vaguely similar to the tracker we featured last year. Unlike last year’s build—which uses an ATmega32u4 breakout board— [ZigZagJoe’s] tracker uses an ATTiny85 for the brains, running a pre-configured table that determines step rate against time.

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The Butt Lamp: Light From Where The Sun Don’t Shine

January 23, 2014 by 28 Comments

[Trent] is one of those guys who can make things happen. A friend of his gifted him a  mannequin derriere simply because he knew [Trent] would do something fun with it. “Something fun” turned out to be sound reactive LED butt. At first blush, this sounds like just another light organ. This butt has a few tricks up its …. sleeve which warrant a closer look. The light comes from some off the shelf 5050 style RGB LED strip. The controller is [Trent’s] own design. He started with the ever popular MSGEQ7 7 Band Graphic Equalizer Display Filter, a chip we’ve seen before. The MSGEQ7 performs all the band filtering and outputs 7 analog levels corresponding to the amplitude of the input signal in that band. The outputs are fed into an ATTiny84, which drives the RGB strip through transistors.

The ATTiny84 isn’t just running a PWM loop. At startup, it takes 10 samples from each frequency band. The 10 samples are then averaged, and used to create a noise filter. The noise filter helps to remove any ambient sound or distortions created by the microphone. Each band is then averaged and peak detected. The difference between the peak and the noise is the dynamic range for that band. The ATTiny84 remaps each analog sample to be an 8 bit value fitting within that dynamic range. The last step is to translate  the remapped signal values through a gamma lookup table. The gamma table was created to make the bright and dark colors stand out even more. [Trent] says the net result is that snare and kick drum sounds really pop compared to the rest of the music.

Without making this lamp the butt of too many jokes, we’d like to say we love what [Trent] has done. It’s definitely the last word in sound reactive lamps. Click through to see [Trent’s] PCB, and the Butt Lamp in action.

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Capacitance Measurement With The Arduino Uno

January 22, 2014 by 25 Comments

CapTestBoard1

Have you ever found the need to measure the capacitance of a capacitor? No multimeter handy (for shame)? Well, as it turns out you can actually measure capacitance using your Arduino Uno, with no external components, and only ~20 lines of code.

[Jonathan Nethercott] does an excellent job explaining a capacitance test circuit which uses a reference capacitor to calculate the unknown capacitance. He further explains that, with the Arduino Uno, you can remove the reference capacitor from the circuit, and simply use the stray capacitance present in the board and microcontroller, which can be calculated. This results in the test circuit being as simple as plugging in your capacitor to pins A0 and A2. Continue reading “Capacitance Measurement With The Arduino Uno” →