An Introduction to Analog Filtering
https://hackaday.com/2025/12/04/an-introduction-to-analog-filtering/

One of the major difficulties in studying electricity, especially when compared to many other physical phenomena, is that it cannot be observed directly by human senses. We can manipulate it …read more (https://hackaday.com/2025/12/04/an-introduction-to-analog-filtering/)

Keebin’ with Kristina: the One with the Pretty Protoypes
https://hackaday.com/2025/12/04/keebin-with-kristina-the-one-with-the-pretty-protoypes/

Some like it flat, and there’s nothing wrong with that. What you are looking at is the first prototype of Atlas by [AsicResistor], which is still a work in progress. [AsicResistor] …read more (https://hackaday.com/2025/12/04/keebin-with-kristina-the-one-with-the-pretty-protoypes/)

Raising a GM EV1 from the Dead
https://hackaday.com/2025/12/04/raising-a-gm-ev1-from-the-dead/

Probably the biggest story in the world of old cars over the past couple of weeks has been the surfacing of a GM EV1 electric car for sale from an …read more (https://hackaday.com/2025/12/04/raising-a-gm-ev1-from-the-dead/)

Build A Pocket-Sized Wi-Fi Analyzer
https://hackaday.com/2025/12/04/build-a-pocket-sized-wi-fi-analyzer/

Wi-Fi! It’s everywhere, and yet you can’t really see it, by virtue of the technology relying on the transmission of electromagnetic waves outside the visual spectrum. Never mind, though, because …read more (https://hackaday.com/2025/12/04/build-a-pocket-sized-wi-fi-analyzer/)

Preventing a Mess with the Weller WDC Solder Containment Pocket
https://hackaday.com/2025/12/04/preventing-a-mess-with-the-weller-wdc-solder-containment-pocket/

Have you ever tipped all the stray bits of solder out of your tip cleaner by mistake? [MisterHW] is here with a bit pf paraffin wax to save the day. …read more (https://hackaday.com/2025/12/04/preventing-a-mess-with-the-weller-wdc-solder-containment-pocket/)

Building a Microscope without Lenses
https://hackaday.com/2025/12/04/building-a-microscope-without-lenses/

It’s relatively easy to understand how optical microscopes work at low magnifications: one lens magnifies an image, the next magnifies the already-magnified image, and so on until it reaches the …read more (https://hackaday.com/2025/12/04/building-a-microscope-without-lenses/)

Biogas Production For Surprisingly Little Effort
https://hackaday.com/2025/12/04/biogas-production-for-surprisingly-little-effort/