03 |  November |  2022

06 | November | 2022

Public transport benches have a rough life. Withstanding a number of wear cycles that would make your sofa weep, it takes a beating and should still look presentable. When trains and buses stop, where do the old seats go? A team from the MIT Hobby Shop investigated what was happening to the seats from the retired MBTA Red Line cars and Recycle them into stylish chairs.

After some snooping and many emails, the MBTA gave up a number of old subway seats for the team. Since subway benches do not have legs, wood from old church benches were used to create the plinths. It took one final brace to create each set of legs, which were cut out on the bandsaw. The old dark stain was removed, and the bases were finished with three coats of gel topcoat, letting the natural beauty of the old oak shine through.

We love seeing old things give new life here at Hackaday. If you want to see more recycled furniture, check this out tire tablethis is Recycled jeans chairor these Best practices for making box forts.

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Remember the chip shortage? We definitely do, because as far as we can tell, it’s still going, at least based on the fact that you can’t get a Raspberry Pi for love or money. But this must be just noise, because according to Report in the Straits Times, not only has the chip shortage ended, but its trajectory has been reversed enough that there is now an abundance of semiconductors. The article claims that the root cause of this is slowing demand for products like smartphones, an industry that is seeing wave after wave of orders for semiconductor manufacturers like TSMC being scrapped. PC chips seem to be in abundance now, too, as the panic attack over buying a machine for remote work during the pandemic is fading away. Automakers are still upset, though, to the point that Toyota now only ships one smart key Two new cars instead of the usual two. So there seems to be some way to go before the market is rebalanced, but whatever it is – just contact us when Amazon doesn’t have to offer it Finance 8 GB Pay.

Continue reading Hackaday links: November 6, 2022

At the budget end of the vibrational range lie the so-called sine ranges. About the size of a deck of cards, it combines a microcontroller and an LCD screen to make an instrument with bandwidths in the tens of kilohertz and performance that doesn’t shine much. It’s a game, but then again, if all that is required is a simple range of sound frequencies, they make an acceptable choice in a small package. Currently [jgpeiro] I made a game that predates game groups by light years, Using Raspberry Pi Pico and 100MHz ADC and trying to design a better input circuit.

At its simplest, this could be a direct op-amp and ADC circuit feeding a Pico, but instead it has multiple stages carefully designed to deliver the full bandwidth, with gain, offset and actuation settings tuned by a series of DAC chips under program control. . That plus decent bandwidth makes this oscilloscope more viable, and we’d love to see further development.

in comparison, We took a look at the best of the competition a few years ago.

The University of Chicago announced that it has created a course It behaves like plastic but behaves like metal. They also say they don’t fully understand why it has worked just yet. Usually, good conductors like metals have highly organized atomic structures, something that plastics don’t have.

The substance is based on nickel, carbon and sulfur. The resulting material was conductive and stable. However, the atomic structure is not as structured as a conventional conductor.

Continue reading Connecting plastic can replace metal

For those who haven’t heard, ultrasonic hovering is a process by which two or more ultrasonic transducers are set opposite each other and excited in such a way as to create a standing wave between them. Sound, as the name implies, is ultrasonic – outside the range of human hearing – but powerful enough that small light objects can be placed and held in mid-air where there is minimal pressure in the standing wave. [Olimex] created small Ultrasound lifting kit that embody this phenomenon.

The kit itself is manufactured using through-hole components, with the ATTiny85 as the primary microcontroller to power the TCT40-16T ultrasonic amplifiers, and the MAX232 to provide the USB interface. Two slotted rectangular PCB pieces attached to the main board, providing a base so the device will stand upright when assembled. The entire device is powered by a USB connection, and ultrasonic amplifiers output in the 40 kHz range provides enough power to levitate small Styrofoam balls.

The project, by design, is an exercise in its simplicity, providing an easily assembled assembly, and providing code that can be easily flashed on the device, inspected, and modified. All design files, including BOM, KiCAD plans and source code It is provided under an open source hardware license to allow anyone who wants to know how such a project works, or extend it themselves, ample opportunity. [Olimex] He also has kit for sale For those who don’t want to get boards and parts themselves.

We have offered ultrasonic lifting devices before, from bare bones System driven by NE555 to me Huge phased arrays.

Supercon enters the final stage: It’s Sunday! But it’s not over yet: there is a file Huge variety of conversations Today, starting at 9:30 a.m. PT, we Streaming the main stage live From start to the Badge Breakthrough Awards Ceremony at 5:30pm. And if you want to join the conversation, head over to hack chat or the discord.

On Friday we kicked off a full day of badge piracy, workshops, food, drink and music. What was previously a late afternoon pre-record has grown into the early morning hours, and has given people a wonderful opportunity to make up after two years of remote situation.

Saturday was filled with supercon, and the talks were exceptional. We’ve taped interviews, taken loads of photos, and of course taped the conversations that were given at the DesignLab stage, and we’ll get them out to you over the coming weeks. (it’s a Many.)

In addition to all the conversations, we Announcing the winners of the 2022 Hackaday Prize! It was a big year for small scale energy generation and recycling, and all the winning projects were smart, well tested and easily replicable. Check them out.

Now that you’re all caught, settle in for a jam-packed Sunday. See you on the live stream if not in real life!


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