Just Who Makes Tubes These Days?

For most of us, electronic technology comes in the form of solid state devices. Transistors, integrated circuits, microcontrollers. But for the first sixty years or so of the field existing, these devices either hadn’t been invented yet or were at too early a stage in their development to be either …read more

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Aesthetic DIY Bluetooth Speakers

DIY Bluetooth speaker projects are always a staple here at Hackady. In our latest feature of DIY audio builds, we have [Patrick’s] vinyl cylindrical speaker.

He found a pretty inexpensive Bluetooth audio amplifier on AliExpress. However, the amplifier module oddly enough had a few missing components that were critical to …read more

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3D Printed Speaker Uses DSP For Ultimate Performance

Speaker design used to be as much about woodwork as it was about advanced acoustic mathematics. In recent decades, technologies such as digital signal processing and 3D printing have changed the game significantly. Leaning heavily on these techniques, [ssashton] developed a design called Mr. Speaker.

The speaker contains a 3″ …read more

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This Tube Preamp Has A Nixie Volume Display

The pursuit of audiophile hi-fi is one upon which many superlatives and perhaps a little too much money are lavished. But it’s also a field in which the self-builder can produce their own equipment that is as good or often better than that which can be bought, so it provides …read more

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Voice recorder matches audio with notes taken with smart pen

When you write notes on paper while recording audio with Reco, it not only records the audio but also matches the audio with your writing,

About five years ago, NeoLab Convergence released a stylish smart pen designed to write like a normal pen, but also transferred notes to a phone or tablet over Bluetooth. Now the company has launched a Kickstarter for a recording device that works with its Smartpen to match written notes with what’s being recorded.

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Category: Mobile Technology, Technology

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ESP32 Becomes Music Player In Under 40 Lines of Code

The demo code for [XTronical]’s ESP32-based SD card music player is not even 40 lines long, though it will also require a few economical parts before it all works. Nevertheless, making a microcontroller play MP3s (and other formats) from an SD card is considerably simpler today than it was years …read more

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