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Last Build Date: Sat, 20 Jan 2018 00:00:09 +0000

 



A Modern Take on the Crystal Radioxtal3dwd5gnr1

Sat, 20 Jan 2018 00:00:05 +0000

We’ll admit that [3DSage] has a pretty standard design for a crystal radio. What we liked, though, was the 3D printed chassis with solderless connections. Of course, the working pieces aren’t 3D printed — you need an earphone, a diode, and some wire too. You can see the build and the finished product in the video below.

Winding the coil is going to take awhile, and the tuning is done with the coil and capacitance built into the tuning arrangement so you won’t have to find a variable capacitor for this build. There is a picture of the radio using …read more


Media Files:
http://2.gravatar.com/avatar/873254e5b4d82165d02a6c077328d23c?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96




Build a Sandblasting Rig for $6md-blaster-800cornbreadninja

Fri, 19 Jan 2018 21:00:28 +0000

Let’s get something out of the way: yes, this assumes you already own or have access to a compressor. So if you do, and know what you’re getting into, why not build a cheap sandblasting rig? That’s what [adamf135] did after seeing someone do it on YouTube. He seriously doubted it would work, but the results are pretty impressive.

This one doesn’t require much more than an empty 20oz bottle, a cheap air gun/nozzle, and an adapter. The hardest part of this hack seems to be cutting a groove in the nozzle for the blasting material without severing it …read more


Media Files:
http://0.gravatar.com/avatar/f217db2e735fe6534dc9aa760dc2ab9e?s=96&d=https%3A%2F%2F0.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96




A Keyboard To Stomp Onmain450lewinday

Fri, 19 Jan 2018 19:30:00 +0000

Macros are useful things. They allow one to execute a series of commands with a single keypress. There exists a wide variety of hardware and software solutions to create and use macros to improve your workflow, and now [Evan] has brought the open-source ManyKey into the fray, along with a build tutorial to boot.

The tutorial acts as a great introduction to ManyKey, as [Evan] walks through the construction of a macro keyboard designed to be operated by the feet. Based around the Arduino Leonardo and using off-the-shelf footswitches commonly used in guitar effects, it’s accessible while still hinting at …read more


Media Files:
http://2.gravatar.com/avatar/bd5c88e8a4514eaa4ed39fe55eeeca3d?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96




Space Escape: Flying A Chair To Lunar OrbitLESSbrianbenchoff

Fri, 19 Jan 2018 18:01:06 +0000

In the coming decades, mankind will walk on the moon once again. Right now, plans are being formulated for space stations orbiting around Lagrange points, surveys of lava tubes are being conducted, and slowly but surely plans are being formed to build the hardware that will become a small scientific outpost on our closest celestial neighbor.

This has all happened before, of course. In the early days of the Apollo program, there were plans to launch two Saturn V rockets for every moon landing, one topped with a command module and three astronauts, the other one containing an unmanned ‘LM …read more


Media Files:
http://hackadaycom.files.wordpress.com/2018/01/lunarflyer-retheme.png




Make A Better, Spring-Loaded SMT Tape Strip HolderTape holder Featureddp2cnk

Fri, 19 Jan 2018 16:30:00 +0000

Every so often, a project is worth some extra work to see if the idea can go any further. [JohnSL] has been busy doing exactly that with his spring-loaded SMT tape holder project. Having done the original with 3D printing, he has been working on designing for injection molding. This isn’t a motorized feeder, it’s still a manual tool but it is an improvement over the usual workshop expedient method of just sticking segments of tape down to the desktop. Tape is fed into the holders from one end and spring tension holds the tape firm while a small slot …read more


Media Files:
http://hackadaycom.files.wordpress.com/2018/01/tape-holder-square.jpg?w=250




Linux Fu: Custom Bash Command Completiontux-on-htop-featuredwd5gnr1

Fri, 19 Jan 2018 15:01:44 +0000

If you aren’t a Linux user and you watch someone who knows what they are doing use Bash — the popular command line interpreter — you might get the impression they type much faster than they actually do. That’s because experienced Linux users know that pressing the tab key will tend to complete what they are typing, so you can type just a few characters and get a much longer line of text. The feature is very smart so you may not have realized it, but it knows a good bit about what you could type. For example, if you …read more


Media Files:
http://hackadaycom.files.wordpress.com/2018/01/bash-icon.png?w=250




Long-Range RFID Leaflets2018-01-16 RFID Feature imageengineermcevoy

Fri, 19 Jan 2018 12:55:25 +0000

Pick a card, any card. [Andrew Quitmeyer] and [Madeline Schwartzman] make sure that any card you pick will match their NYC art installation. “Replantment” is an interactive art installation which invites guests to view full-size leaf molds casts from around the world.

A receipt file with leaf images is kept out of range in this art installation. When a viewer selects one, and carries it to the viewing area, an RFID reader tells an Arduino which tag has been detected. Solid-state relays control two recycled clothing conveyors draped with clear curtains. The simple units used to be back-and-forth control but …read more


Media Files:
http://0.gravatar.com/avatar/6a9f616ccbceceeffabb8b93bafd8cab?s=96&d=https%3A%2F%2F0.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96