Building a Discrete Component 75 Baud Modem
https://hackaday.com/2026/08/21/building-a-discrete-component-75-baud-modem/

These days, modems are pretty fancy bits of kit, what with to keep up with the speeds of cable, VDSL, and fiber connections. At lower speeds, though, it’s entirely possible …read more (https://hackaday.com/2026/08/21/building-a-discrete-component-75-baud-modem/)

Hackaday Podcast Episode 383: QR Codes, Caving Gear, and the Old School Way to Learn Electronics
https://hackaday.com/2026/08/21/hackaday-podcast-episode-383-qr-codes-caving-gear-and-the-old-school-way-to-learn-electronics/

In this week’s episode, Hackaday Editors Elliot Williams and Tom Nardi start things off by getting excited about the recently announced 2026 Retrocomputing Challenge. From there the conversation will cover …read more (https://hackaday.com/2026/08/21/hackaday-podcast-episode-383-qr-codes-caving-gear-and-the-old-school-way-to-learn-electronics/)

PVC Pipe Turned DIY Digital Telescope
https://hackaday.com/2026/08/21/pvc-pipe-turned-diy-digital-telescope/

[Makestreme] had always wanted to own a nice telescope, but found that budget would not stretch to anything above a cheap model with a limited 50 mm aperture. Wanting a …read more (https://hackaday.com/2026/08/21/pvc-pipe-turned-diy-digital-telescope/)

Thermoacoustic Sterling Engine is Now Fully 3D Printable
https://hackaday.com/2026/08/21/thermoacoustic-sterling-engine-is-now-fully-3d-printable/

Would you like to make your own energy? Why, who doesn’t in this era of rising costs! A sterling engine always looks like a good fit for that: highly efficient, …read more (https://hackaday.com/2026/08/21/thermoacoustic-sterling-engine-is-now-fully-3d-printable/)

Building a Hammond Organ to Understand How They Work
https://hackaday.com/2026/08/21/building-a-hammond-organ-to-understand-how-they-work/

The Hammond organ is an early form of electronic– or perhaps electromechanical– musical instrument. It solved the very real problem of organs normally being the sort of thing you built …read more (https://hackaday.com/2026/08/21/building-a-hammond-organ-to-understand-how-they-work/)

How the Grid’s Harmonic Filters Keep the Power Clean
https://hackaday.com/2026/08/21/how-the-grids-harmonic-filters-keep-the-power-clean/

A fun way to think about a national electrical grid is as a massively upscaled electrical circuit, one in which you have multiple power supplies injecting AC power, with various …read more (https://hackaday.com/2026/08/21/how-the-grids-harmonic-filters-keep-the-power-clean/)

Hacking A Cat Litter Box
https://hackaday.com/2026/08/21/hacking-a-cat-litter-box/

[Joseph DiGiovanni] is the owner of a Litter Robot 4. It’s a convenient mechanized litter box for cats that can clean itself to reduce unwelcome odors inside the home. He …read more (https://hackaday.com/2026/08/21/hacking-a-cat-litter-box/)