2025 One Hertz Challenge: Estimating Pi With An Arduino Nano R4
https://hackaday.com/2025/08/09/2025-one-hertz-challenge-estimating-pi-with-an-arduino-nano-r4/

Humanity pretty much has Pi figured out at this point. We’ve calculated it many times over and are confident about what it is down to many, many decimal places. However, …read more (https://hackaday.com/2025/08/09/2025-one-hertz-challenge-estimating-pi-with-an-arduino-nano-r4/)

Desk Top Peltier-Powered Cloud Chamber Uses Desktop Parts
https://hackaday.com/2025/08/09/desk-top-peltier-powered-cloud-chamber-uses-desktop-parts/

There was a time when making a cloud chamber with dry ice and alcohol was one of those ‘rite of passage’ type science projects every nerdy child did. That time …read more (https://hackaday.com/2025/08/09/desk-top-peltier-powered-cloud-chamber-uses-desktop-parts/)

Hacking Printed Circuit Board to Create Casing and Instrument Panels
https://hackaday.com/2025/08/09/hacking-printed-circuit-board-to-create-casing-and-instrument-panels/

Over on Hackaday.io our hackers [Angelo] and [Oscarv] are making a replica of the PDP-1. That is interesting in and of itself but the particularly remarkable feature of this project …read more (https://hackaday.com/2025/08/09/hacking-printed-circuit-board-to-create-casing-and-instrument-panels/)

SparcStation 1+ Finally Gets Attention
https://hackaday.com/2025/08/09/sparcstation-1-finally-gets-attention/

We can’t throw stones. [Leaded Solder] picked up a SparcStation 1+ in 2018 and found it only produced illegal instruction errors. We’re sure he’s like us and meant to get …read more (https://hackaday.com/2025/08/09/sparcstation-1-finally-gets-attention/)

Cheap Thermal Camera Fits the Bill
https://hackaday.com/2025/08/10/cheap-thermal-camera-fits-the-bill/

If you want to save a little money on a thermal camera, or if you just enjoy making your own, you should have a look at [Evan Yu’s] GitHub repository, …read more (https://hackaday.com/2025/08/10/cheap-thermal-camera-fits-the-bill/)

Building a 7-Segment Shadow Clock
https://hackaday.com/2025/08/10/building-a-7-segment-shadow-clock/

There are plenty of conventional timepieces out there in the world; we’ve also featured a great many that are aesthetically beautiful while being unreadably esoteric. This neat “shadow clock” from …read more (https://hackaday.com/2025/08/10/building-a-7-segment-shadow-clock/)

A Solar-Only, Battery-Free Device That Harvests Energy from a BPW34 Photodiode
https://hackaday.com/2025/08/10/a-solar-only-battery-free-device-that-harvests-energy-from-a-bpw34-photodiode/