Spinners built into games of chance like roulette or tabletop board games stop on a random number after being given a good spin. There is no trick, but they eventually rest because of friction, no matter how hard your siblings wind up for a game-winning turn. What if the spinning continued forever and there was no programming because there was no controller? [Ludic Science] shows us his method of making a perpetual spinner with nothing fancier than a scrapped hard disk drive motor and a transformer. His video can also be seen below the break.
Fair warning: this involves mains power. The brushless motor inside a hard disk drive relies on three-phase current of varying frequencies, but the power coming off a single transformer is going to be single-phase AC at fifty or sixty Hz. This simplifies things considerably, but we lose the self-starting ability of the motor and direction control, but we call those features in our perpetual spinner. With two missing phases, our brushless motor limps along in whatever direction we initiate, but the circuit couldn’t be much more straightforward.
This is just the latest skill on a scrapped HDD motor’s résumé (CV). They will run with a 9V battery, or work backwards and become an encoder. If you want to use it more like the manufacturer’s intent, consider this controller.
Continue reading “Scrapped Motors Don’t Care About Direction”
[BarryAbrams] found some 90s speakers on the side of the road. At first he thought he might have made a real score, but his coworker who knows about this sort of thing (we all have one) let him know they were merely average. Undaunted, he removed the speakers from their MDF housing, fixed a small dent in one of the tweeters, and got to work.
He cut a new frame for the speakers out of plywood. He adorned the plywood box with maple and walnut from a local supplier. The box then got a coat of urethane. His skill at sign making showed in the final finish, and the wood looks very good. Our only complaint is the straight legs instead of the slightly angled and tapered ones common to mid-century modern furniture style.
The electronics are a Chinese amp and a Sonos knock-off. [Barry] only needed to control the volume and power for the speaker set. He came up with a clever 3D-printed knob and switch configuration. When the volume is turned all the way down the speaker set turns off.
The end result sounds and looks better than anything he could get for the $125 US Dollars he spent on the project. We certainly wouldn’t complain if this were a fixture in our living space.
Continue reading “Mid Century Modern Speaker From 90s Road Trash”
MetaFilter is reporting that Wired magazine (available on paper) has killed one of our favorite features. Found: Artifacts From the Future was a back page that asked artists and designers to create possible future products. While the magazine generally had a positive view, even in its sloppy use of infoporn, Found always seemed to have a comforting cynicism. Products appeared helpful on the surface, but still exhibited modern pitfalls: Even if you took the big leap to get a Bluetooth implant, it still required a two year contract. The Responsibeer could tell exactly how drunk you were, but did nothing to prevent localized debauchery. A Smart Windshield provided info on unsafe drivers… while obscuring your view.
The short of it is: Found was our kind of futurism. It was excited about new technology while emphasizing all the frustrations we currently have trying to get consumer products to do what we want. It’s sad to see something that got people thinking beyond the now go away. MeFi has conveniently assembled links to all the online Found features.