Have you ever looked at a small development board like an Arduino or an ESP8266 board and thought you’d like one with just a few different features? Well, [Kai] has …read more (https://hackaday.com/2025/11/10/rp2040-from-scratch-roll-your-own-dev-board-magic/)

The Strange Depression Switch Discovered Deep Inside The Brain
https://hackaday.com/2025/11/10/the-strange-depression-switch-discovered-deep-inside-the-brain/

As humans, we tend to consider our emotional states as a direct response to the experiences of our lives. Traffic may make us frustrated, betrayal may make us angry, or …read more (https://hackaday.com/2025/11/10/the-strange-depression-switch-discovered-deep-inside-the-brain/)

2025 Component Abuse Challenge: Playing Audio on a Microphone
https://hackaday.com/2025/11/10/2025-component-abuse-challenge-playing-audio-on-a-microphone/

Using a speaker as a microphone is a trick old enough to have become common knowledge, but how often do you see the hack reversed? As part of a larger …read more (https://hackaday.com/2025/11/10/2025-component-abuse-challenge-playing-audio-on-a-microphone/)

Testing Whether Fast Charging Kills Smartphone Batteries, and Other Myths
https://hackaday.com/2025/11/10/testing-whether-fast-charging-kills-smartphone-batteries-and-other-myths/

With batteries being such an integral part of smartphones, it’s little wonder that extending the period between charging and battery replacement has led to many theories and outright myths about …read more (https://hackaday.com/2025/11/10/testing-whether-fast-charging-kills-smartphone-batteries-and-other-myths/)

Investigating Soldering Iron Phantom Voltage
https://hackaday.com/2025/11/10/investigating-soldering-iron-phantom-voltage/

Just because you are paranoid doesn’t mean people aren’t out to get you. Do you think your soldering iron is after you? Well, [nanofix] asks (and answers): Is My Soldering …read more (https://hackaday.com/2025/11/10/investigating-soldering-iron-phantom-voltage/)

The Sanskrit Square Root Algorithm
https://hackaday.com/2025/11/10/the-sanskrit-square-root-algorithm/

Years ago, no math education was complete without understanding how to compute a square root. Today, you are probably just reaching for a calculator, or if you are writing a …read more (https://hackaday.com/2025/11/10/the-sanskrit-square-root-algorithm/)

Programming the 6581 Sound Interface Device (SID) with the 6502
https://hackaday.com/2025/11/10/programming-the-6581-sound-interface-device-sid-with-the-6502/

Over on YouTube, [Ben Eater] pursues that classic 8-bit sound. In this video, [Ben] integrates the MOS Technology 6581 Sound Interface Device (SID) with his homegrown 6502. The 6581 SID …read more (https://hackaday.com/2025/11/10/programming-the-6581-sound-interface-device-sid-with-the-6502/)