Kritik sah

[Applied Science] has a new demo of an old 1970s patent for a portable generator that is both interesting and terrifying. The generator uses sodium and water, which, if you remember your old chemistry classes, will combust spontaneously. Turns out, though, it won’t if you draw power from it fast enough. Don’t draw enough power? BOOM, apparently. Check it out in the video below. Of course, lithium-ion batteries might catch fire, too, but this looks a lot more likely. The patent made some wild claims about how much you could draw from the device, but the video shows that practical results are somewhat less. Mechanically, a spinning metal disk has a sodium electrode extremely close to it. Water flows through the tiny gap, and electricity will flow between the two electrodes. This seems to be the only practical device built on this principle that is available to the public. We presume the original inventor built something, but there’s no record of it. The mechanical c...

[Michael H Thiesen] had a couple of Elgato Key Lights in his home streaming setup. The only problem was that they would stop responding regularly, requiring a power cycle to get them going again. He never quite pinned down where the problem lay; instead, he set about replacing the light controllers wholesale to provide more reliable functionality. In place of the original controllers, a pair of ESP32-C3 boards were substituted in. The original design simply had a Realtek controller chip wired into a PCA9635 LED controller, so the swap was as easy as plucking one out and wiring the new microcontroller in its place. The capable ESP32-C3 offers native Matter support, which enabled the new controllers to join [Michael’s] Apple Home setup natively. Running a firmware coded in Rust, the controllers offer power, brightness, and colour-temperature control right in Apple Home. As a bonus, there was no need to use Homebridge to get the lights hooked up to the smarthome setup anymore, elimi...

[The Mike Stuff] has an interesting proposition. He asserts that ancient people like the Greeks could have built a form of radio that was purely mechanical . We aren’t sure we agree, but even if it were possible, we are sure it would have sounded awful. You can see the details in the video below. The idea is that you can compress air with a waterwheel, blow it through a rotating disk with slots in it, and a valve to amplitude modulate the airflow through the disk. Horns like an old gramophone speaker would amplify the signal at both ends. The demodulation is straightforward and doesn’t even require power, like compressed air. This is a fun idea, but even [Mike] notes it wouldn’t be very good. We suspect you’d just hear a 10 kHz buzz. On the other hand, this would be pretty easy to build if you wanted to test it. Use an electric motor to spin the disk — after all, we’ll stipulate that you could turn a disk with water power, even if speed control is ...

The Nintendo Game Boy is quite possibly the most popular console in the international chiptune community. You might have seen musicians cranking out tunes with LSDJ or Nanoloop, but now there’s a new option for writing bangers on the DMG. It’s Drum Machina Go! , put together by [audiowanderer]. The original Game Boy has a four-bit audio engine with two pulse channels, one waveform channel, and a noise channel. To that end, DMGo! gives you those four channels to play with, each with a 16-step sequencer. There’s also an FX section, ADSR controls, and various filtering options to make your sound juicier, richer, or grainier, depending on your taste. There are also helpful sync options via the link port, such as for use with other Game Boys, or you can use PULSE OUT sync to hook up to your Teenage Engineering Pocket Operators or KORG Volcas if you have them. There are also fun features like the MANGLING FX which lets you decay and destroy your musical creations live by p...