You don’t have two ears by accident. [Stoppi] has a great post about this, along with a video you can see below. (The text is in German, but that’s what …read more (https://hackaday.com/2021/11/16/binaural-hearing-modeled-with-an-arduino/)

Jigglypuff Sensor Breathes CO2 So You Don’t Have To
https://hackaday.com/2021/11/16/jigglypuff-sensor-breathes-co2-so-you-dont-have-to/

We’ve seen a lot of environmental monitoring projects here at Hackaday. Seriously, a lot. They usually take the form of a microcontroller, a couple sensors, and maybe a 3D printed …read more (https://hackaday.com/2021/11/16/jigglypuff-sensor-breathes-co2-so-you-dont-have-to/)

Quick and (Not Very) Dirty Negative Voltage Supply
https://hackaday.com/2021/11/16/quick-and-not-very-dirty-negative-voltage-supply/

There comes a time in every hardware hacker’s career during which they first realize they need a negative voltage rail in their project. There also comes a time, usually ~10ms …read more (https://hackaday.com/2021/11/16/quick-and-not-very-dirty-negative-voltage-supply/)

Hacking Multiplication with Karatsuba’s Algorithm
https://hackaday.com/2021/11/16/hacking-multiplication-with-karatsubas-algorithm/

People tend to obsess over making computer software faster. You can, of course, just crank up the clock speed and add more processors, but often the most powerful way to …read more (https://hackaday.com/2021/11/16/hacking-multiplication-with-karatsubas-algorithm/)

Cramming a DS Inside a Gameboy
https://hackaday.com/2021/11/16/cramming-a-ds-inside-a-gameboy/

Many holiday recipes and console hacks share a common theme: cramming a thing inside another thing. Whether it’s turducken or a Nintendo DS inside a Gameboy, the result is always …read more (https://hackaday.com/2021/11/16/cramming-a-ds-inside-a-gameboy/)

NTP, Rust, and Arduino Make a Phenomenal Frequency Counter
https://hackaday.com/2021/11/17/ntp-rust-and-arduino-make-a-phenomenal-frequency-counter/

Making a microcontroller perform as a frequency counter is a relatively straightforward task involving the measurement of the time period during which a number of pulses are counted. The maximum …read more (https://hackaday.com/2021/11/17/ntp-rust-and-arduino-make-a-phenomenal-frequency-counter/)

Arduino Library Makes Digital Rain Like It’s 1999
https://hackaday.com/2021/11/17/arduino-library-makes-digital-rain-like-its-1999/

There’s going to be a new Matrix movie in theaters next month, and you know what that means: we’re about to see a whole new generation get obsessed with the …read more (https://hackaday.com/2021/11/17/arduino-library-makes-digital-rain-like-its-1999/)

Russian Anti-Satellite Weapon Test Draws Widespread Condemnation
https://hackaday.com/2021/11/17/russian-anti-satellite-weapon-test-draws-widespread-condemnation/