Day: December 4, 2018

Go Up A Creek Without A Paddle

December 4, 2018 by 31 Comments

Kayaks are a some of the most versatile watercraft around. You can fish from them, go on backpacking trips, or just cruise around your local lake for a few hours. They’re inexpensive, lightweight, don’t require fuel, and typically don’t require a license or insurance to operate. They also make a great platform for a solar-powered boat like this one with only 150 watts of panels and a custom-built motor with parts from an RC airplane.

[William Frasier] built his solar-powered kayak using three solar panels, two mounted across the bow of the boat using pontoons to keep them from dipping into the water, and the other mounted aft. Separating the panels like this helps to prevent all three of them being shaded at once when passing under bridges. They’re all wired in parallel to a 12V custom-built motor which is an accomplishment in itself. It uses custom-turned parts from teak, a rot-resistant wood, is housed in an aluminum enclosure, and uses an RC airplane propeller for propulsion.

Without using the paddles and under full sun, the kayak can propel itself at about 4 knots (7 kmh) which is comparable to a kayak being propelled by a human with a paddle. With a battery, some of the shading problems could be eliminated, and adding an autopilot to it would make it almost 100% autonomous.

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Hackaday Visits The Electric City

December 4, 2018 by 23 Comments

Much to the chagrin of local historians, the city of Scranton, Pennsylvania is today best known as the setting for the American version of The Office. But while the exploits of Dunder Mifflin’s best and brightest might make for a good Netflix binge, there’s a lot more to the historic city than the fictional paper company. From its beginnings as a major supplier of anthracite coal to the introduction of America’s first electrically operated trolley system on its streets, Scranton earned its nickname “The Electric City” by being a major technological hub from the Industrial Revolution through to the Second World War.

Today, the mines and furnaces of Scranton lie silent but not forgotten. In the 1980’s, the city started turning what remained of their industrial sites into historic landmarks and museums with the help of State and Federal grants. I recently got a chance to tour some of these locations, and came away very impressed. They’re an exceptional look into the early technology and processes which helped turn America into an industrial juggernaut.

While no substitute for visiting these museums and parks for yourself, hopefully the following images and descriptions will give you an idea of what kind of attractions await visitors to the modern day Electric City.

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Teensy Liberates The ThinkPad Keyboard

December 4, 2018 by 39 Comments

[Frank Adams] liked the keyboard on his Lenovo ThinkPad T61 so much that he decided to design an adapter so he could use it over USB with the Teensy microcontroller. He got the Trackpoint working, and along the way managed to add support for a number of other laptop boards as well. Before you know it, he had a full-blown open source project on his hands. Those projects can sneak up on you when you least expect it…

The first step of the process is getting your laptop keyboard of choice connected up to the Teensy, but as you might expect, that’s often easier said than done. They generally use a flexible printed circuit (FPC) “ribbon cable” of some type, but may also be terminated in any number of weirdo connectors. [Frank] goes over the finer points of getting these various keyboards connected to his PCB, from searching the usual suspects such as Aliexpress and Digikey for the proper connector to throwing caution to the wind and cutting off problematic nubs and tabs to make it fit.

You might be on your own for figuring out the best way to connect your liberated keyboard up, but [Frank] has done his part by designing a few PCBs which handle routing the appropriate connections to the Teensy LC or 3.2 microcontroller. He’s such a swell guy he’s even written the firmware for you. As of right now there’s currently a dozen keyboards supported by his software and hardware setup, but he also gives tips on how to get the firmware modified for your own board if you need to.

It should come as no surprise that it was a Thinkpad keyboard that got [Frank] going down this path; as we’ve documented over the years, hackers love their Thinkpads. From fitting them with more modern motherboards to going full on matryoshka and putting a second computer inside of one, it’s truly the laptop that launched a thousand hacks.

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Getting Started With Free ARM Cores On Xilinx

December 4, 2018 by 13 Comments

We reported earlier about Xilinx offering free-to-use ARM Cortex M1 and M3 cores. [Adam Taylor] posted his experiences getting things working and there’s also a video done by [Geek Til It Hertz] based on the material that you can see in the second video, below.

The post covers using the Arty A35T or Arty S50 FPGA boards (based on Artix FPGAs) and the Xilinx Vivado software. Although Vivado will allow you to do conventional FPGA development, it also can work to compose function blocks to produce CPUs and that’s really what’s going on here.

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