Sunday, April 20, 2014 - 21:33EGGS
Sunday, April 20, 2014 - 21:12The Egg Painter
The Easter tradition of dying eggs is practiced by people all over the world, but in Ciocanesti, a small village in Romania’s northern region of Bukovina, this tradition has evolved into an art form.
Sunday, April 20, 2014 - 20:23Underwater ROV at the Edinburgh mini Maker Faire
Sunday, April 20, 2014 - 19:33Making stuff with SplatForm at the Edinburgh mini Maker Faire
Sunday, April 20, 2014 - 19:00Blinky LED Necklace That Actually Looks Chic
[Agy] a fabric hacker in Singapore has made a chic light sensitive LED necklace, and written up the tutorial on her blog Green Issues by Agy. The lovely thing about this hack is that it doesn’t look like a breadboard round her neck, and most of the non-electronic components have been upcycled. [Agy] even used Swarovski crystals as LED diffusers for extra bling.
Using a LilyPad Arduino with a light sensor and a few LEDs, [Agy's] circuit is not complicated. She seems to be just branching out in to wearable tech, so it is nice that she learnt to program different modes for bright and low light (see video below). Her background in sewing, refashioning and upcycling does show through in her crafty use of an old pair of jeans and lace scraps for this project.
We love tech focused jewelry like [TigerUp's] LED matrix pendants or [Armilar's] Nixie-ify Me Necklace, but they do scream Geek. DIY electronically enhanced accessories are becoming more commonplace with the variety of micro-controller platforms expanding rapidly. Low energy wearable boards like MetaWear are making it easy for the tech to be discreet and easily connected to your smartphone. 3D printing is enabling us to create durable enclosures, settings and diffusers like the ones used for LED Stegosaurus Spikes. With all these things, hobby wearable projects can not only be functional and durable, but can also look great too.
Do you think this necklace would look out of place in a non-geeky gathering? Have you got any helpful tips for [Agy's] code? Have you tried using gems or crystals as diffusers and what were the results? Let us know in the comments below.
Filed under: wearable hacks
Sunday, April 20, 2014 - 18:24The Edinburgh Tool Library at the Edinburgh mini Maker Faire
You can't own every tool, and even if you're lucky enough to be a member of a hackspace or makerspace, you can't take them home if they do. Which is where the Edinburgh Tool Library comes in, it's a new charity that not only wants to lend you tools, but teach you how to use them.
Sunday, April 20, 2014 - 18:14Talpadk: Measuring printbed tempeartures on a RepRapPro Huxley
I have finally gotten around to measuring the surface temperature of my Huxley.
Method and instruments used
For measuring the temperature a Agilent U1233A with a U11186A (k type thermocouple) has used.
The ambient temperature has measured by waiting for the display to settle and the taking a readout.
The heat bed temperatures has measured on top of the aluminium print surface with the polyarmide tape left in place.
The thermocouple was held in place by another piece of polyarmide tape.
The thermocouple was left on the print bed for 1 minute for the temperature to stabilize, the temperature was then measured on the multimeter using the “avg” function after a 2 minute sampling period.
The temperatures were measured at the centre and approximately 1cm from the edge.
The center temperature was measured an additional time at the end of the measurement cycle.
The print bed was in its forward position with the print head to the left at the end stop (cooling fan running)
The ambient temperature was measured as 22.1C at start of the surface scan, and 24.4C at the end.
The heat bed has maintained at 85C using the 3d printer firmware.
NA 71.2C 75.8C 77.6C 71.1C
75.2C 75.6C 77.1C 72.8C
After this the thermocouple was reapplied using a fresh piece of polyarmide tape at the centre of the print bed and left there.
The print bed set point was then reduced and the surface temperature measured.
Set point [C] Measured [C] Percentage 85 76.2 90 70 63.1 90 55 50.2 91 40 37.8 95
Some of the variances in the measurements across the bed might be related probe mounting relative to the surface and cooling to ambient.
Using a piece of foam or another insulator might improve this.
The lower measurement points may simply be caused by a bad thermal contact to the print bed.
Heat sink compound could perhaps have alliviated some of this as well (and made a lot of mess).
Also even though the measurements was taken as a 2 minute average, the temperature swings of the heat bed regulation may have contributed with some noise.
Also a thermal camera would have made this much easier and quicker, too bad they are so expensive.
(And that Fluke VT02/VT04 visual thermometers has such a bad resolution)
I would consider the bed temperature constant across the print bed within the uncertainty of my measurements.
At “higher” temperatures the surface temperature seems to be roughly 90% of the set point.
Sunday, April 20, 2014 - 16:21What should I see at the Edinburgh mini Maker Faire?
Sunday, April 20, 2014 - 16:00The Computer Without A CPU
[Jeff Laughton] was contacted by a customer that was interested in adding some automated functions to a printing press. Before eventually settling on a microcontroller for the job, [Jeff] went old school and started looking at logic gates, counters, and flip-flops. This lead him to the Motorola 14500 industrial control unit, a minimal processor with only 16 instructions. After a few ‘back of the napkin’ sketches, he came up with an extremely minimal computer that doesn’t use a microprocessor. It’s an interesting design notable not only for its electronic brevity, but also because it only uses one instruction.
The only instruction this computer will ever execute is an input test, the result of which controls a two-way branch. Instructions consist of an input address, output address, and a single bit of data. If the data bit is true, the computer jumps to one location in ROM, and if the data bit is false, a jump to another location is executed.
A computer really isn’t a computer without some form of memory, and this design is no exception. [Jeff] managed to add two bits of data between the 8-bit latch and 8-bit multiplexer in the design. This is enough to call a few subroutines which test the I/O-mapped memory to decide what the next instruction should be.
It’s a truly bizarre design, but actually much closer to a true Turing machine than the computers in your pocket, on your wrist, on your desk, and in your car.
Thanks [James] for the tip!
Filed under: misc hacks
Sunday, April 20, 2014 - 14:58Co2 detecting and display in an outlet with an OLED
Co2 detecting and display in an outlet with an OLED. timv1 in the Adafruit customer support forums writes-
Concerning the monitoring of the CO2 I’ll share an idea for displaying it.
Wanted to keep it all inside an outlet that could be used to power a solenoid connected to the CO2 tank. Due to space limitations I decided on using a little OLED… A place like OshPark can make you up a board SUPER inexpensive if you’re interested in such things. Anyhow, here are some pictures of the what I did to get the little OLED into the outlet.
Sunday, April 20, 2014 - 14:51Internet of Things – When phoning home breaks everything
Adafruit is working on a few Internet of Things products, services and more – we’re thinking carefully about the best and open way to do this as you’d expect. We started with an Internet of Things Bill of Rights.
We believe Internet of Things devices should all come with a well established expectation of what they will and will not do with consumer’s data. In the article we put together the start of what we hope will help this effort – Minimizing Risk Is Easy: Adopt a Bill of Rights
- Open is better than closed; this ensures portability between Internet of Things devices.
- Consumers, not companies, own the data collected by Internet of Things devices.
- Internet of Things devices that collect public data must share that data.
- Users have the right to keep their data private.
- Users can delete or back up data collected by Internet of Things devices.
Today we saw that Samsung’s data center caught on fire and their products check Samsung.com before being able to get online. You can see how this would usually be a good idea, if the device cannot reach Samsung.com then the device likely isn’t online… except when Samsung.com is offline, then everything breaks. Someone reverse engineered what their TV was trying to do.
For “Internet of Things” devices and services, there should be more checks than a single point of failure.
Sunday, April 20, 2014 - 14:50Wall-E the Edinburgh mini Maker Faire
Sunday, April 20, 2014 - 13:41The Darwin Toolbox at the Edinburgh mini Maker Faire
I talked to Philip Boeing from UCL about the Darwin Toolbox—an affordable biotechnology laboratory in a compact toolbox-size container that should allow you to get started doing real DIY genetics at home.
Sunday, April 20, 2014 - 13:28Honda’s Dancing Humanoid Robot
Even in today’s rapidly evolving world of technology, there are few things that make your jaw drop when you see them in real life. Honda’s ASIMO is one of those things.
Sunday, April 20, 2014 - 13:00Make a 3D Scanner for 60€ Using Old Hardware
[Till Handel] just put the finishing touches on a paper he wrote about how to build a cheap 3D scanner — mostly out of spare parts.
Using parts from old printers and notebooks, he’s cobbled together this rather rough-looking laser scanner. But don’t be fooled by its looks! It’s capable of scanning 360° around itself at distances from 0.3 – 5m, making it an excellent candidate for scanning rooms.
It uses a line laser and a webcam mounted on an arm driven by a stepper motor, which looks like it’s out of an old optical drive. An Arduino Uno and an A4988POW stepper driver control the system. The paper (Caution: PDF) is very detailed and published under GPLv3 (a general public license).
It works the same as many 3D scanners — a line laser provides a 2D profile/outline of the object being scanned that the camera picks up. As the system (or object) rotates, new profiles are recorded and sewn together to form a complete 3D image.
To increase the resolution and accuracy of the scanner, you can always put a better camera on the end!
Filed under: laser hacks
Sunday, April 20, 2014 - 11:00Roll up, roll up for the Edinburgh mini Maker Faire
Sunday, April 20, 2014 - 10:00Filament Extruder Pumps Out 1kg/hour!
3D printers are awesome, and while the plastic filament may not be as much as a rip off as printer ink (yet), it’s still marked up at least 500%! If you really want to break free, you’re going to need your own filament extruder.
ABS, a typical printing material, will run you about $30 USD per kilogram. Don’t get us wrong, that will go a long way — but did you know ABS pellets (technically processed MORE than filament) can be as cheap as $3-4/kg?
What if you could buy the pellets, and make your own filament with them? If you do a lot of printing, this could save you a lot of money. We’ve seen lots of different filament extruders here on Hackaday, and here’s yet another iteration — capable of extruding at an extremely fast rate of 1kg per hour! [Ian McMill] was inspired by [Xabbax's] Low Cost Filament Extruder, and has put together an excellent Instructable guide on how to make your own — with his own flair of course.
Take a look!
Filed under: 3d Printer hacks
Sunday, April 20, 2014 - 09:00Pyro Board: 2D Rubens’ Tube
Rubens’ Tube is an awesome demo and here we take it to the next level with a two-dimensional ‘Pyro Board’. This shows unique standing wave patters of sound in the box.
The pressure variations due to the sound waves affect the flow rate of flammable gas from the holes in the Pyro Board and therefore affect the height and colour of flames. This is interesting for visualizing standing wave patterns and simply awesome to watch when put to music. Thank you to Sune Nielsen and everyone at Aarhus for sharing this demonstration with me! And thanks for having me at your conference.
Sunday, April 20, 2014 - 08:00The IRS explains their use of computers, circa 1961
Imagine the uproar when the IRS went to computers back in the 1960s. In their short film Right on the Button, the IRS tries to convince the public to get with the times. via Network World:
From today’s National Archives blog on the topic: “When the IRS began using computers in 1961, many people were horrified. An article in Harper’s Magazine titled, “The Martinsburg Monster: A True Horror Story for Taxpayers,” described how computers limited the possibilities for refunds. A tax expert then envisioned a scenario in which erroneous notices forced people to overpay, or $100 million dollars in unwarranted refund checks were issued.
The shift towards computer technology also made Internal Revenue Commissioner, Mortimer Caplin, a well-known and controversial figure. One reporter accused Caplin of “bringing Big Brother into everyone’s life in the form of the Martinsburg Monster.” In February 1963, Caplin was the cover story of Time magazine, in which he supported the changes made under his administration. Controversy surrounding the IRS computers was not limited to water cooler conversations, it was reflected in the mass media.”
The National Archives says of the film: “Right on the Button attempts to combat these technology driven fears. The film highlights the benefits of a computerized system: Computers could speed up processing times, discover errors taxpayers make against themselves, and verify that all citizens pay a fair amount. Additionally, the film emphasizes the IRS employees who maintain and check the ADP system. This was likely an attempt to quell fears that computers would replace human jobs. Viewers today are more likely captivated by the refrigerator-size computers and 1960s hairdos.”
Sunday, April 20, 2014 - 07:00Flexible Arduino Sure to Be A Hit
Wearable, lightweight hacks have long been dominated by the Lilypad. This will probably change with the introduction of the Printoo. Using printable circuit technology, the Printoo takes a modular approach to enable hackers, makers, and engineers alike to construct flexible circuits that can be put on almost anything, including paper!
Powered by the all too familiar ATmega328, the Printoo core module is fully compatible with the Ardunio IDE. The modular design enables functionality with several other printed devices including displays, batteries, sensors and even LED strips to make many different projects possible. One of the most interesting modules is the 1.5 volt, 500 micron thick electrochromic display.
Be sure to check out their Kickstarter, which has a nice video that demonstrates the project. If funded, they will be available in October in case you want to get your hands on one. Or feel free to make your own. Just be sure to let us know if you do!