[Andrew Klein] knows the pain of building drawers from plywood. It can be a pain to get all of the pieces measured and cut just right. Then you have to line them up, glue them together, and clamp them perfectly. It’s time-consuming and frustrating. Then one day it hit him that he might be able to make the whole process much easier using a custom saw blade.
The the video below, [Andrew] does a great job explaining how the concept works using a piece of paper. The trick is that the plywood must be cut in a very specific shape. This shape results in the plywood just barely being held together, almost as if it’s hinged. The resulting groove can then be filled with wood glue, and the plywood is folded over on itself. This folding process leaves no gaps in the wood and results in a strong joint. Luckily this special shape can be cut with a specialized saw blade.
This new process removes the requirement of having five separate pieces for a drawer. Instead, only four cuts are needed on a single piece of square plywood. The corners are then removed with a razor blade and all four sides are folded up and into place. [Andrew] shows that his prototype blade needs a little bit of work, but he’s so hopeful that this new invention will be useful to others. Continue reading “Smarter-than-wood Saw Blade Makes Perfect Foldable Joints”
[Jim’s] technique for turning a wireless doorbell into a custom ringtone player is so simple. He manages to get the entire thing done using only a screwdriver and wire clippers as tools. But if you’re looking to use this over the long-term we’d recommend soldering the connections rather than relying only on the twisted wires.
Above you can see all the components used in the project. The wireless doorbell unit is no different from most battery-operated units on the market today. Inside the Radio Shack box is a recording module that lets you play up to 20 seconds of audio. This is powered by the 9V battery on the right. [Jim] removes the speaker from the doorbell and clips off one of the wires that connected it to the board. This is reused as the ground connection for the recording module. The other speaker wire is connected to the ‘Play’ button on the module’s PCB. That’s it, just record your custom sound and pack everything back into the doorbell’s case. You can see the entire hack and hear a demonstration after the break.
Continue reading “Simple hack plays any sound as your door chime”
As the most direct interface between computer and programmer, keyboards can be a deeply personal, sometimes almost religious thing. Some find solace in their vintage IBM Model M, or luxurious leather keyboard, but maker [Carol Chen] took things into her own hands, quite literally. [Carol]’s Maker Faire exhibit has a half dozen specimens of interesting commercial tactile and ergonomic options…but [Chen]’s personal keyboard, where she commits to her work as a full-time coder, has been made to her own exacting specifications.
Continue reading “BAMF2011: Keyboards built from scratch”
Wireless controller, more powerful custom-made motors, stronger frame, and with a name like DeathBlades, we can’t think of a single reason why you would prefer heel treads, well everyone was young at one time.
[Charleg] has been testing out a slightly new frame, despite having only half the motors necessary, and is getting great results hitting around 23Wh/mi. If you’re looking to build your own, his blog has a post for nearly every aspect of the design.
[Thanks Jerome Demers]
In this video from Maker Faire, [Jon Beck] of CLUE — the Columbia Laboratory for Unconventional Electronics — demonstrates the unexpected ease of creating custom electroluminescent (EL) displays using materials from DuPont and common t-shirt screen printing tools. Eagle-eyed reader [ithon] recognized the Hack a Day logo among the custom shapes, which escaped our notice at the time. Sorry, Jon! Very cool project, even if the setup is a bit steep. You’ll find links to materials at the project site.
If the interviewer seems especially sharp, that’s because it’s none other than [Jeri “Circuit Girl” Ellsworth], who makes transistors from scratch and designed the C64 DTV. We’re not worthy!
Okay, we lied, we totally want one of these too. The CMT 380X Blackbird is one wicked hybrid car!
Looking like it just rolled off the set of the next Batman film, the Blackbird is the brainchild of Electronic Arts Chief Creative Director [Richard Hilleman]. Starting from a kit car base — the Factory Five Racing GTM chassis — [Hilleman] created a unique 230 horsepower drive train combining a 30 kilowatt diesel turbine and 24 KWh lithium polymer battery pack.
As a purely plug-in electric car, the Blackbird has a range of 85 miles. In hybrid mode, range is extended to 500 miles. The car can accelerate from 0 to 60 in about 7 seconds. Come decelerating, the car makes use of regenerative braking.
It’s strictly a one-off for the time being, but several companies have approached [Hilleman] about possibly commercializing the design. A couple more choice pics follow the break…
Continue reading “BAMF2010: CMT 380X Blackbird”
[Hailrazer] is at it again with a new portable N64 build. He’s done the impossible by improving upon his last design. The LCD screen is now mounted flush for a cleaner and smaller case. The controls draw from a lot of different sources; a gamecube stick for durability, a 3rd party N64 controller for buttons, and a PlayStation controller for the shoulder buttons that serve as L, R, and Z (either hand). There is a breakout box that allows two controllers to be plugged in. Combine this with the TV out feature and it acts as a console or a handheld. His in depth demonstration is embedded after the break.
The build log (linked above) details every part of the hack so that you can try to do this yourself. The relocation of the expansion slot requires patience and solid soldering skills. The case work is an art in itself. We speculate that this commission comes somewhere close to $1000 but it’s hard to put a price on quality craftsmanship. We’ve seen smaller, but these features and finished look can’t be beat.
Continue reading “Gorgeous portable N64 built to order”