2025 Component Abuse Challenge: A Transistor As A Voltage Reference
https://hackaday.com/2025/11/01/2025-component-abuse-challenge-a-transistor-as-a-voltage-reference/

For our 2025 Component Abuse Challenge there have been a set of entries which merely use a component for a purpose it wasn’t quite intended, and another which push misuse …read more (https://hackaday.com/2025/11/01/2025-component-abuse-challenge-a-transistor-as-a-voltage-reference/)

Building a PV Solar-Powered Quadcopter
https://hackaday.com/2025/11/01/building-a-pv-solar-powered-quadcopter/

One of the most frustrating parts about flying a quadcopter is having to regularly swap battery packs, as this massively limits what you can do with said quadcopter, never mind …read more (https://hackaday.com/2025/11/01/building-a-pv-solar-powered-quadcopter/)

An Audio Brick For Your Smart Home
https://hackaday.com/2025/11/01/an-audio-brick-for-your-smart-home/

If you’ve ever wanted to pump sound to all the rooms of your house, you might use any one of a number of commercial solutions. Or, you could go the …read more (https://hackaday.com/2025/11/01/an-audio-brick-for-your-smart-home/)

Multitasking On The Humble Z80 CPU
https://hackaday.com/2025/11/01/multitasking-on-the-humble-z80-cpu/

Multitasking is something we take for granted these days. Just about every computer we use, from our desktops to our phones, is capable of multitasking. It might sound silly to …read more (https://hackaday.com/2025/11/01/multitasking-on-the-humble-z80-cpu/)

Building a Xenon Lamp for Spectroscopy
https://hackaday.com/2025/11/02/building-a-xenon-lamp-for-spectroscopy/

Before a spectrometer can do any useful work, it needs to be calibrated to identify wavelengths correctly. This is usually done by detecting several characteristic peaks or dips in a …read more (https://hackaday.com/2025/11/02/building-a-xenon-lamp-for-spectroscopy/)

Building A DIY Ryzen-Based PC!
https://hackaday.com/2025/11/02/building-a-diy-ryzen-based-pc/

https://www.youtube.com/watch?v=9TmLN8_jEKs
" data-image-caption="" data-medium-file="https://hackaday.com/wp-content/uploads/2025/10/Screenshot-From-2025-10-23-16-57-27.png?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2025/10/Screenshot-From-2025-10-23-16-57-27.png?w=800">This project gives a whole new meaning to DIY PC. We don’t know how capable you were as a teenager, but could you have designed your own Ryzen-based mini PC? Whilst …read more (https://hackaday.com/2025/11/02/building-a-diy-ryzen-based-pc/)

Building a Rubik’s Cube That Solves Itself
https://hackaday.com/2025/11/02/building-a-rubiks-cube-that-solves-itself/