There’s a part you’ll find in almost every mains powered switch mode power supply that might at first appear to have only one application. An optocoupler sits between the low …read more (https://hackaday.com/2025/10/29/2025-component-abuse-challenge-the-opto-flasher/)

FLOSS Weekly Episode 853: Hardware Addiction; Don’t Send Help
https://hackaday.com/2025/10/29/floss-weekly-episode-853-hardware-addiction-dont-send-help/

This week Jonathan and Rob chat with Cody Zuschlag about the Xen project! It’s the hypervisor that runs almost everywhere. Why is it showing up in IoT devices and automotive? …read more (https://hackaday.com/2025/10/29/floss-weekly-episode-853-hardware-addiction-dont-send-help/)

Supercon 2025 Badge Gets Vintage Star Trek Makeover
https://hackaday.com/2025/10/29/supercon-2025-badge-gets-vintage-star-trek-makeover/

There are still a few days before the doors open on this year’s Hackaday Supercon in Pasadena, but for the most dedicated attendees, the badge hacking has already begun…even if …read more (https://hackaday.com/2025/10/29/supercon-2025-badge-gets-vintage-star-trek-makeover/)

10 Cent Microcontroller Makes Tracker Music
https://hackaday.com/2025/10/29/10-cent-microcontroller-makes-tracker-music/

We are absurdly spoiled these days by our microcontrollers. Take the CH32V00X family– they’ve been immortalized by meme as “the ten cent micro” but with a clock speed of 48MHz …read more (https://hackaday.com/2025/10/29/10-cent-microcontroller-makes-tracker-music/)

Hello World in C Without Linking in Libraries
https://hackaday.com/2025/10/29/hello-world-in-c-without-linking-in-libraries/

If there’s one constant with software developers, it is that sometimes they get bored. At these times, they tend to think dangerous thoughts, usually starting with ‘What if…’. Next you …read more (https://hackaday.com/2025/10/29/hello-world-in-c-without-linking-in-libraries/)

Making RAM for a TMS9900 Homebrew Computer
https://hackaday.com/2025/10/29/making-ram-for-a-tms9900-homebrew-computer/

Over on YouTube [Usagi Electric] shows us how to make RAM for the TMS9900. He starts by remarking that the TI-99/4A computer is an excellent place to start if you’re …read more (https://hackaday.com/2025/10/29/making-ram-for-a-tms9900-homebrew-computer/)

How Simple Can A Superhet Be
https://hackaday.com/2025/10/30/how-simple-can-a-superhet-be/

If you cultivate an interest in building radios it’s likely that you’ll at some point make a simple receiver. Perhaps a regenerative receiver, or maybe a direct conversion design, it’ll …read more (https://hackaday.com/2025/10/30/how-simple-can-a-superhet-be/)

Why Sodium-Ion Batteries are Terrible for Solar Storage
https://hackaday.com/2025/10/30/why-sodium-ion-batteries-are-terrible-for-solar-storage/