Bullet Time With A Ceiling Fan

July 2, 2013 by 29 Comments

freaking awesome

Bullet time has been around since at least the first Matrix movie (actually there was a Gap ad before that), and despite it being an oft-used cinematic technique, it still hasn’t gotten old. [Jeremiah] wanted to tap into the awesomeness of bullet time, and managed to come up with a great camera rig using only a GoPro and a ceiling fan.

The build really relies on only two components: a GoPro camera and a ceiling fan. In [Jeremiah]’s videos, a ceiling fan is mounted between two trees on a sturdy piece of lumber. The GoPro is suspended from one of the fan blades with the help of a piece of wood, a hinge, and a short bit of cable. After [Jeremiah] wired up the fan to a dimmer switch he could control the speed of the fan and Bob’s your uncle.

This isn’t the first time a GoPro has been used for a bullet time rig. In fact, our buddy [Caleb] did a similar build by spinning the camera around on a lazy suzan. Gotta love the high frame rate available on the GoPro, huh?

Vidias after the break.

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USB Sniffing With The BeagleBoard-xM

July 2, 2013 by 21 Comments

[Matlo] wrote in to share his USB sniffing project using the BeagleBoard-xM. It builds on the Google Summer of Code project from 2010 that used the non-xM version of the hardware to build a pass through USB sniffer. [Matlo] couldn’t get it to work back then, but recently revisited the project. He’s cleaned up some scripts and generally made it a bit easier for others to pull off as well.

The ARM-based BeagleBoard seen above acts as man-in-the-middle. You connect your target USB device to the board and the board to a computer. The board emulates the target device, passing packets in either direction while also logging them. The captured data is in the correct format for display using WireShark, the de facto standard for making sense of captured communication packets.

This is great for figuring out how to use USB devices on non-standard systems, or vice versa.

The Definitive Guide To Solder Stencils

July 2, 2013 by 18 Comments

Yes, we’ve seen our share of tutorials for making solder paste stencils, but [Felix] hit it out of the park with this one. It’s the definitive guide to making solder stencils at home, with quality as good as you would find in any professionally made stencil.

The material for the stencils comes from the same source as so many other DIY solder stencils – aluminium cans. The interior plastic coating and the exterior paint job are both removed with heat, acetone, and patience. After laying out the cream layer of his board in a PDF file, [Felix] used a fairly interesting transfer medium to get the toner onto the aluminum; cheap vinyl shelving paper attached to a piece of paper apparently makes for an ideal surface to transfer toner.

After transfer, the board is etched with HCl and peroxide. [Felix] is getting some very good results with his method, including a few very fine pitch IC footprints. It’s just as good as a professionally made, laser cut stainless stencil, and you probably already have all the necessary ingredients lying around your house. That’s a win anytime.

Turning Grandpa’s O-scope Into A Clock

July 1, 2013 by 28 Comments

clock

Around 1960, [Aaron]’s grandfather decided to try his hand at a new career in electronics repair. It didn’t pan out, but before he gave up he built a beautiful Heathkit oscilloscope, a model OR-1. Grandpa’s electronics career never took off, but years later it would serve as the impetus for [Aaron]’s own career in electronics. Now [Aaron] has too many oscilloscopes, but still wanted a way to preserve his grandfather’s legacy. An oscilloclock was just the project to do that.

Of course to turn an oscilloscope into a clock requires some interesting control circuitry, and [Aaron] didn’t skimp on his build. He created a custom control board that is able to draw any shape on the CRT screen using just circles; squashing circles to draw a line, and cutting the beam entirely to slice a circle in half.

This isn’t [Aaron]’s first oscilloclock by a long shot. He previously created this amazing clock completely from scratch. Still, using Grandpa’s old tools is a great way to make this oscilloscope useful again, even if [Aaron] is already up to his gills in test equipment.

Hackaday Looking For A Good Home

July 1, 2013 by 195 Comments

hackaday

Below is a statement from [Jason Calacanis], the owner of hackaday ———————-

HackADay.com, an awesome maker community, is looking for a new home
——–

tl;dr: HackADay is a passionate community of hackers doing awesome stuff. It deserves more attention than I can give it right now, as I’m ultra-focused on the launch of Inside.com. So, we’re looking for a caring new owner with a stellar track record of not f@#$ing up brands to take it over.

——–

We created HackADay back in 2004 because one of Engadget’s awesome bloggers, Phil Torrone, wanted to do super-geeky projects every day and the Engadget audience wasn’t exactly into that frequency.

In a phone call with PT I said, “So you want to do a hack a day?”

He was like, “Yeah, a hack a day.”

And I was like, “OK, let’s do hackaday.com.”

When we sold Weblogs Inc. to AOL, we took HackADay out of the deal because it was doing stuff that a corporate parent’s legal arm might not feel comfortable with (e.g., hacking cable boxes!).

So, I bought it and kept it safe and warm inside of Mahalo.com for the past couple of years. However, since I’m super focused on the Inside.com launch, I need to find a new home for it.

It’s doing over $14k a month in advertising without a sales force (just AdSense mainly), and it’s got an amazing stable of bloggers. Given its 6m pageviews a month and with an advertising sales force doing a modest $15 RPM, Hackaday could do $90k a month.

We’ve got 5,674 members of our email list after just five months (should have started it 10 years ago, would have been at 100k+ by now!).

We’ve started doing some epic videos on YouTube. Collectively the videos have over 5m views and 31k subscribers: www.youtube.com/hackaday

This awesome video broke 1m views: http://youtu.be/LZkApleQQpk

Our Twitter handle has 29k followers.

We’re hoping someone like Maker, DemandMedia, InternetBrands, AOL (without Time Warner involved!), Gawker or another publisher can carry on this awesome, profitable and limitless brand.

If you’re interested, send a note to jason@inside.com.

Also, HackADay is looking for a new editor-in-chief. Please send sample projects, posts and whatever else you got to neweditor@hackaday.com.

Thanks for allowing me this and for your help with any new home ideas.

best @jason

Briefcase Mill

July 1, 2013 by 8 Comments

briefcase-mill

Take the machine shop with you; that’s the mantra which drove [Ryan] to build this CNC mill in a briefcase. That album will give you a taste of the final product. But you’ll want to dig through two pages of his forum thread starting with this post in order to behold the build process.

The image above is only part way through the fabrication, but we thought it gave the best overall view of his work. It’s missing the cables which connect to the control circuitry in the lid. The bed has also not been installed and this was before he fabricated the protective case for the PCBs.

Getting everything to fit inside of a folding case was quite a trick. Of course he used CAD to make sure it was possible. There are several places where the clearance when closed is about 2mm. We’re shocked by the build quality of the mill itself. It’s a novel idea to make it portable, but the accuracy and reliability of the machine didn’t suffer for the concept.

If you need a desktop mill that’s not quite as portable here’s a project which will dish out some inspiration.

Raspberry Pi Automates Your Tomato Farm

July 1, 2013 by 15 Comments

rpi-tomato-farming

Check out the tomato plants [Devon] grew using a monitoring system he built himself. It’s based around a Raspberry Pi. As far as grow controllers go it falls a bit short of full automation. That’s because the only thing it can actuate is the black water line seen hovering above the plants. But [Devon’s] work on monitoring and collecting sensor data should make it easy to add features in the future.

The moisture sensors pictured above monitor the soil in which the plants are growing. But he also has temperature and light sensors. These are very important when growing from seed and could be used in conjunction with a heating mat for plants that require higher soil temperatures (like pepper plants). The tomatoes are also pretty leggy. Now that he’s monitoring light levels it would be good to augment the setup with a grow light. A long term goal could even be a motorized bed which could raise the plants right up to the bulbs so they don’t reach for the light.

Don’t let the stars in our eyes distract you though. He’s done a ton of work on the project both with the physical build, and in plotting the data collected by the system. Great job!

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