One SMT Breakout To Rule Them All

April 16, 2016 by 33 Comments

You need to use surface-mount technology (SMT) parts in your design. But you also need to prototype. How to fit those little buggers into your breadboard?

[Simon] came up with a general-purpose SMT-to-breadboard solution. Now, there are already myriad adapter boards for the many-pin devices: SSOP-to-DIP adapters and so on. But what do you do when you just need to work that tiny SOT223 voltage regulator into a breadboarded circuit?

[Simon]’s solution fills that gap with one breadboardable design to handle all of your small-pin-count part needs. It accommodates SOT223, SOT323, and SOT23 three-pin parts like transistors or voltage regulators, and also has pads for all of the common two-terminal parts like resistors and capacitors from 0402 on up to 1206. You could build up a full voltage regulator circuit on one of these things. He’s even included some whitespace on the back for your notes.

SMT parts aren’t even the future any more. And with the right procedure, they’re not hard to hand-assemble. So the next time you have some extra space in a PCB order, toss in a couple of [Simon]’s breakouts and you’ll be ready for your next breadboarding session.

Automatic Book Scanner To Bring Knowledge To Ethiopian Students

April 15, 2016 by 35 Comments

In 2013 the dean of an Ethiopian university addressed Maker Faire Hannover and outlined one of his concerns; that the high price of developed-world textbooks was holding back the cause of education for universities such as his own in developing countries. He was there to ask for help from the maker community to solve his problem, and a group of his audience took up the challenge to create an affordable and accessible automatic book scanner.

Their scanner builds on the work of Google engineer [Dany Qumsiyeh], whose open source linear book scanner turns pages by traversing the opened book over a triangular prismic former such that pages are turned by vacuum as they pass over carefully designed slots in its surface. Their modification replaces the vacuum with the Coandă effect, to more gently tease open each page and it is hoped reduce the chance of damaging the volumes being scanned.

The whole machine is controlled by a Raspberry Pi, and the scanning is performed by linear scanning optics, sensors, and electronics taken from flatbed scanners.

An important design goal of the project was to ensure that the scanner could be built without special tools or expertise that might be difficult to find in a developing country, as well as that it should be as inexpensive as possible. The frame of the machine is off-the-shelf extruded aluminium, and the body is acrylic sheet which can be cut to shape with a hand saw if necessary. It is estimated that the device will cost in the region of 500 Euros (about $568) to build.

More information can be found at the project’s web site (German language, Google translate link), including a selection of videos such as the one below the break showing the device in operation.

Writing from the perspective of having been peripherally involved in a professional book scanning operation at a large publisher the benefits of this machine are immediately apparent. Removing the binding and automatically scanning each page as an individual sheet produces a very fast and high quality result, but by its very nature damages the volume being scanned. This machine promises to deliver a solution to the problem of book scanning that is considerably less intrusive.

It is also worth noting that the project does not address any copyright issues that might arise from scanning commercially published textbooks, though this is more of a concern for the end user in terms of what they scan with it than it is for the maker.

Continue reading “Automatic Book Scanner To Bring Knowledge To Ethiopian Students” →

Home Automation And Monitoring With Edison

April 15, 2016 by 9 Comments

[Tyler S.] has built a home automation and monitoring system dubbed ED-E, or Eddie. The name is an amalgam of its two main components, the Edison board from Intel, and some ESP8266 modules.

ED-E’s first job is to monitor the house for extraordinary situations. It does this with a small suite of sensors. It can detect flame, sound, gas, air quality, temperature, and humidity. With this array, it’s probably possible to capture every critical failure a house could experience, from burglars to water pipe leaks. It uploads all this data to Intel’s Analytics Cloud where we assume something magical happens to it.

ED-E can also sense the state of other things in the house, such as doors, with remote sensors. The door monitors, for example, are an ESP8266 and a momentary switch in a plastic case with a lithium ion battery. We’re not sure how long they’ll run, but presumably the Analytic Cloud will let us know if the battery is low via the aforementioned magic.

8728871444406519500_smallLastly, ED-E, can turn things in the house on and off. This is accomplished in 100% Hackaday-approved (if not UL-approved) style with a device that appears to be a lamp cable fed into a spray painted Altoids tin.

ED-E wins some style points for its casing. It’s a very well executed hack, and we’d not previously considered just how many awful situations can be detected with off the shelf sensors.

Chromecast Vintage TV Is Magic

April 15, 2016 by 19 Comments

When [Dr. Moddnstine] saw a 1978 General Electric TV in the trash, he just had to save it. As it turned out, it still worked! An idea hatched — what if he could turn it into a vintage Chromecast TV?

He opened up the TV and started poking around inside. We should note that old TV’s are pretty dangerous to open up if you’re not familiar with the components inside — high-voltages that could kill you linger on some capacitors. [Dr. Moddnstine] didn’t go into too much detail, so do a little extra research before you open up a TV.

Part of his goal for this project was to keep everything self-contained within the TV so all you would have to do is plug it into the wall in order to use it. Since the TV is so old, it doesn’t even have an analog RCA connections for a video input — just a VHF input. Because of this he needed to use three separate connection adapters to get the video signal to the TV.

Continue reading “Chromecast Vintage TV Is Magic” →

3D Printing Houses From Concrete

April 15, 2016 by 85 Comments

We’ve seen 3D-printed houses before, but most make use of prefabricated chunks. This hurricane and tornado resistant hotel suite in the Philippines was printed in one shot.

Sound familiar? This is the work of [Andrey Rudenko], who started by building a concrete 3D printer in his garage 2 years ago, moved on to 3D printing his kids a concrete castle in his backyard later that year and now appears to have a full-blown company offering commercial 3D printed houses. Way to go [Andrey]!

The building was designed in Sketchup no less, and the printer makes use of Pronterface for the control software. It’s absolutely fascinating to see this built at full-scale. We want one. Continue reading “3D Printing Houses From Concrete” →

128 LEDs, 5 Buttons, IR Comm, And A Few Hours: What Could You Create?

April 15, 2016 by 10 Comments

When the second band had played its last encore, before the legendary DJ took the stage, a cadre of hardware hackers climbed three steps with a twinkle in their eyes and glowing electronics in their hands. I’m surprised and relieved that the nugget of excitement that first led me to twiddle a byte in a microcontroller is still alive, and this moment — this crossroads of hacker family — stirred that molten hot center of adventure in everyone.

The badge hacking demoscene is a welcoming one. No blinking pixel is too simple, and no half-implemented idea falls short of impressing everyone because they prove the creativity, effort, and courage of each who got up to share their creation. How could we ever get together as a community and not do this?

It was after midnight before we began the demoparty. I somehow managed to come to the Hackaday | Belgrade conference without a USB webcam to use as a top-down camera. I also didn’t line up someone to record with a camera until minutes before. Please forgive our technical difficulties — we first tried to use a laptop webcam to project to the bigscreen. When that failed, focusing on the badges because tough for our ad-hoc camera operator. This video is a hack, but I think it’s worth looking past its tech problems.

The crowd gathered as close to the stage as possible and there was electricity in the audience as the wiles of the day were explained. Join me after the break for a brief rundown of each demo, along with a timestamp to find it in the video.

Continue reading “128 LEDs, 5 Buttons, IR Comm, And A Few Hours: What Could You Create?” →

Hackaday Dictionary: Ultrasonic Communications

April 15, 2016 by 27 Comments

Say you’ve got a neat gadget you are building. You need to send data to it, but you want to keep it simple. You could add a WiFi interface, but that sucks up power. Bluetooth Low Energy uses less power, but it can get complicated, and it’s overkill if you are just looking to send a small amount of data. If your device has a microphone, there is another way that you might not have considered: ultrasonic communications. Continue reading “Hackaday Dictionary: Ultrasonic Communications” →