Category Archives: Blog

Stealing 3D Models by Audio Recording a 3D Printer

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A bright professor at the University of California-Irvine discovered it’s possible to steal the design of a 3D model by simply doing an audio recording of the 3D printer printing it. Apparently, they have demonstrated a 90% accuracy of model reconstruction using this technique. Simply having an employee working at a manufacturing facility with a cell phone on them could invite the possibility of industrial espionage if they were to give such a recording to a competitor. Fascinating proof of concept!

1992 SouthLAN/MNWADA Joint Packet Radio Node Install at Faribault

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During much of 1991, the SouthLAN and MNWADA Packet Radio Clubs in Southern Minnesota planned and designed 3 high-speed packet radio nodes to be installed at Apple Valley, Faribault, and Dodge Center. The Faribault site, MNFBL:N0QVC-1, would have a 1200 baud user frequency on 145.01 MHz, a 9600 baud backbone towards Dodge Center on 430.95 MHz, and a 19.2 kilobaud backbone towards N0DAI-1 in Apple Valley on 430.55 MHz. This was one of the first high-speed amateur wireless data communications services in the upper midwest, and passed hundreds of messages between the Twin Cities Metro area and Rochester, MN throughout the 90s and early 2000s. All locations used WA8BXN’s MSYS bulletin board system and G8BPQ nodes, with a combination of Kantronics Data Engines and D4-10 radios. The N0QVC-1 Johnson RSDL VHF radio is still used as an APRS node on 144.39 in the Faribault area at this location as of 2016.

The video is a glimpse of the antenna and TNC install at the Faribault location on May 23, 1992.

October 21, 2015

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Well, it’s here! Tomorrow is the day where everyone in “Back to the Future II” were driving flying cars, cruising on hoverboards, and wearing jeans with their pockets turned inside out. Our “present” future might not be quite as exciting, but hey, at least we have the Internet!