Pull-string most useless machine

The mechanical simplicity of this pull-string controlled most useless machine is delightful. You can see the metal gripper which is reaching up to tug on a light-fixture-style pull chain. This is how it turns itself off after you’ve pulled the string to power it up.

The device is [Alex555's] entry in the 7400 Logic competition. We do hope that he … Read the rest

Battling most useless machine gets an expressive upgrade

We suppose the only thing more useless than a most useless machine is giving it an emoticon face. But that’s exactly what has happened with this project. But you’ll want to seen the whole thing, as the presentation involves much more than an angry box that can shut itself off.

This is the second iteration of the angry box. … Read the rest

Most useless machine: building elevator edition

[Niklas Roy] calls it his Perpetual Energy Wasting Machine, but we know it for what it truly is: a building-sized most useless machine. You’ll remember that a most useless machine is a bobble that uses clever design to turn itself off once you have turned it on. This does the same thing with the elevator of the WRO … Read the rest

Rotating platform makes most useless machine concept useful

[Valentin] used a simple concept to build this auto-reversing rotating platform. The concept is extremely simple, the leads for the motor are attached to a double-pole double-throw switch which allow the polarity to be reversed. Flip the switch in one direction and it spins clockwise. Flip it in the other direction and it spins counter-clockwise.

In this case, he’s … Read the rest

Hackaday Links: February 8, 2012

Most useless machine

We love ‘em, and we hope you do too. Here’s [Phase2plus'] take on the most useless machine.

Scratching like it’s 1989

[Nick] spent three bucks at the thrift store and ended up buying days worth of fun with this cassette player. He hacked it to scratch like vinyl.

3D printed jawbone

This lady now has … Read the rest

Hackaday Links: October 16, 2011

Spinning DNA animation using sprites

[James Bowman] shows a way to use sprites to simulate parts of DNA moving in 3 dimensional space. The animations are driven by an Arduino board and Maple board, which allows a comparison of the processing differences between the two. [Thanks Andrew]

Tiny Pong

This Pong game is so small (translated), you’ll … Read the rest

Most useless machine upgrade — now with a button!

There’s a soft spot in our hearts for pointless projects, as long as they’re well executed. [Bertho] really hit the mark with his take on the most useless machine. We’ve seen several renditions of this concept, most of them hinging on a box that will turn a mechanical switch off whenever you turn it on. But this take … Read the rest