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/

Normally when you think solar projects, you think of big photovoltaic cells. But a photodiode is just an inefficient, and usually much smaller, PV cell. Since [Pocket Concepts]’s Solar_nRF has …read more (https://hackaday.com/2025/08/10/a-solar-only-battery-free-device-that-harvests-energy-from-a-bpw34-photodiode/)

Coping with Disappearing Capacitance in a Buck Converter
https://hackaday.com/2025/08/10/coping-with-disappearing-capacitance-in-a-buck-converter/

Designing a circuit is a lot easier on paper, where components have well-defined values, or lacking that, at least well-defined tolerances. Unfortunately, even keeping percentage tolerances in mind isn’t always …read more (https://hackaday.com/2025/08/10/coping-with-disappearing-capacitance-in-a-buck-converter/)

2025 One Hertz Challenge: Using Industrial Relays to Make a Flasher
https://hackaday.com/2025/08/10/2025-one-hertz-challenge-using-industrial-relays-to-make-a-flasher/

These days, if you want to flash some LEDs, you’d probably grab a microcontroller. Maybe you’d go a little more old-school, and grab a 555. However, [Jacob] is even more …read more (https://hackaday.com/2025/08/10/2025-one-hertz-challenge-using-industrial-relays-to-make-a-flasher/)

Hackaday Links: August 10, 2025
https://hackaday.com/2025/08/10/hackaday-links-august-10-2025/

We lost a true legend this week with the passing of NASA astronaut Jim Lovell at the ripe old age of 97. Lovell commanded the ill-fated Apollo 13 mission back …read more (https://hackaday.com/2025/08/10/hackaday-links-august-10-2025/)

Amiga Programming in 2025 with AmiBlitz
https://hackaday.com/2025/08/10/amiga-programming-in-2025-with-amiblitz/

Having owned an Amiga microcomputer is apparently a little bit like having shaken hands with Shoggoth: no one can escape unchanged from the experience. Thirty-two years on, [Neil] at The …read more (https://hackaday.com/2025/08/10/amiga-programming-in-2025-with-amiblitz/)

The Trials Of Trying To Build An Automatic Filament Changer
https://hackaday.com/2025/08/11/the-trials-of-trying-to-build-an-automatic-filament-changer/