Oh, so getting the defusable alarm clock!
Raspberry pi coming to the world of iBeacon.
Oh it is so shiny – it draws you in.
Thanks Hackaday and Instructibles for brining this to light! Brilliant project –
To keep the design simple, [SilverJimmy] opted for a fixed cutting table, which meant moving the cutting head and the X-Axis as a unit along the Y-Axis. The solution was to take inspiration from gantry cranes. He snagged a couple of stepper motors with threaded shafts, designed the parts in Inkscape, then fired up his full-size cutter to carve out the pieces. An Arduino Uno and the relays for the laser and fans sit on the MicroSlice’s bottom platform, and two EasyDriver motor controllers sit above them on the next layer.
Swing by the Instructables for more details including the source code, and to see a video of the engraver below. [SilverJimmy] sourced his laser from eBay, but check out the engraver from earlier this year that used a DVD diode.
Always good to have OS alternatives for 123Catch at hand.
Good collection of board under $100
Yesterday, we noticed this article in EDN.
I have to say that this is a well-written and very accurate article, which uses the proper terminology unlike the bombastic article posted by Linux.com a few weeks ago, which was named “Top 10 Open Source Linux Boards Under $200” and 7 out of 10 boards quoted inside this article were not Open Source Hardware at all but closed source.
This often causes confusion – people assume that if a board runs Linux, it is open source but this is not the case. If this were true, I should call my laptop, which runs Ubuntu, Open Source Laptop which is obviously incorrect!
There is a very clear definition as to what Open Source Hardware is.
Open source hardware is hardware whose design is made publicly available so that anyone can study, modify, distribute, make, and sell the design or…
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From the ESA Image of the Day – this is a truly remarkable image. Taken from the ESA XMM-Newton Space Telescope, as it shifts its gaze from one X Ray object to another – it shows some notable celestial objects. Its a mosaic of 73,178 individual images adjusted for the Galactic projection/ plane lying across the centre of the image.
Bright object on the right: Vela supernova, 150 x larger than a full moon. On the left is Cygnus Loop, an expanding shock wave caused by a star ending in a supernova <15k years ago. At the centre is Scorpius X-1 – the first object/source to be discovered through X-Rays alone, at 9000 light years from the Earth and is the strongest source of X-Rays apart from our own Sun. My eyesight fails me to recognise the Small and Large Magellanic Clouds – dwarf galaxies neighbours within the Milky Way.
This image covers 62% of the sky and these 1200 individual slews were recorded just between 2011-12. Links to the ever expanding database from XMM-Newton at: