PIC32 DMA SPI

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Sep 272016
 


[Mike] wanted to drive several SPI peripheral from a PIC32. He shows how much latency his conventional interrupt handlers were taking away from his main task. He needed something more efficient. So he created the SPI channels using DMA. He also made a video (see below) with a very clear…
Source: PIC32 DMA SPI

Shop Made Squareness Comparator

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Sep 272016
 


[Stefan Gotteswinter] has a thing for precision. So it was no surprise when he confessed frustration that he was unable to check the squareness of the things he made in his shop to the degree his heart desired. He was looking enviously at the squareness comparator that [Tom Lipton] had…
Source: Shop Made Squareness Comparator

Restoring a vintage Xerox Alto day 8: it boots!

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Sep 262016
 


We’ve been restoring a Xerox Alto from the 1970s for several months, and we finally got it to boot and run some programs! There’s still some hardware debugging ahead of us, since the Alto drops into the debugger for many programs, but we’re quite happy to see the system running.…
Source: Restoring a vintage Xerox Alto day 8: it boots!

Reverse engineering a server CPU voltage regulator module

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Sep 262016
 


Andy Brown wrote an article on reverse engineering a CPU voltage regulator: A recent ebay fishing expedition yielded an interesting little part for the very reasonable sum of about five pounds. It’s a voltage regulator module from a Dell PowerEdge 6650 Xeon server. I originally bought this because I had…
Source: Reverse engineering a server CPU voltage regulator module

Electronic Message In a Bottle

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Sep 262016
 


We remember going to grandfather’s garage. There he would be, his tobacco pipe clenched between his teeth, wisps of smoke trailing into the air around him as he focused, bent over another of his creations. Inside of a simple glass bottle was something impossible. Carefully, ever so carefully, he would use his custom tools to twist wire. He would…
Source: Electronic Message In a Bottle

Ig Nobel Prizes: GoatMan, Volkswagen, and the Personalities of Rocks

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Sep 262016
 


Every year, the Journal of Improbable Research issues its prizes for the craziest (published) scientific research: the Ig Nobel Prize. The ceremony took place a couple nights ago, and if you want to see what you missed, we’ve embedded the (long) video below. (Trigger warning: Actual Nobel laureates being goofy.)…
Source: Ig Nobel Prizes: GoatMan, Volkswagen, and the Personalities of Rocks

Hackaday Prize Entry: Raspberry Pi Thermal Imaging

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Sep 262016
 


High up on the list of desirable technologies that are edging into the realm of the affordable for the experimenter is the thermal camera. Once the exclusive preserve of those with huge budgets, over the last few years we’ve seen the emergence of cameras that are more affordable, and most…
Source: Hackaday Prize Entry: Raspberry Pi Thermal Imaging

Hackaday Links: September 25, 2016

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Sep 262016
 


So you like watching stupid stuff? Here you go, a scene from Bones that tops the infamous ‘IP backtrace with Visual Basic’ or ‘four-handed keyboard’ scenes from other TV shows. Someone hacked the bones by embedding malware in a calcium fractal pattern. Also, when she uses the fire extinguisher, she doesn’t spray…
Source: Hackaday Links: September 25, 2016

Air-Powered Top Only Possible on a 3D Printer

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Sep 252016
 


One of the major reasons anyone would turn to a 3D printer, even if they have access to a machine shop, is that there are some shapes that are not possible to make with conventional “subtractive manufacturing” techniques. There are a few more obvious reasons a lot of us use 3D…
Source: Air-Powered Top Only Possible on a 3D Printer

Sending Music Long Distance Using A Laser

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Sep 252016
 


This isn’t the first time we’ve seen DIYers sending music over a laser beam but the brothers [Armand] and [Victor] are certainly in contention for sending the music the longest distance, 452 meter/1480 feet from their building, over the tops of a few houses, through a treetop and into a…
Source: Sending Music Long Distance Using A Laser

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