[David] has a young child who is clever enough to use a computer to play music, but he doesn’t quite want to hand over the mouse just yet. Thus, he …read more (https://hackaday.com/2026/08/03/child-friendly-music-player-uses-rfid/)

Circuit Bending, But Make It MIDI
https://hackaday.com/2026/08/03/circuit-bending-but-make-it-midi/

Circuit bending is a chaotic art. At its simplest, it can just involve making connections between random points on a circuit board to create weird sounds in musical hardware. Or, …read more (https://hackaday.com/2026/08/03/circuit-bending-but-make-it-midi/)

Energizing a Vacuum Tube Flip-Flop Module of the IBM 604
https://hackaday.com/2026/08/03/energizing-a-vacuum-tube-flip-flop-module-of-the-ibm-604/

Taking a break from ogling microscopic features in Intel’s semiconductor processors, [Ken Shirriff] is back to instead poking at decidedly macroscopic pluggable modules from the 1948 IBM 604 Electronic Calculator. …read more (https://hackaday.com/2026/08/03/energizing-a-vacuum-tube-flip-flop-module-of-the-ibm-604/)

Sketching Temporary Circuits with a Light-Triggered Floquet Topological Insulator
https://hackaday.com/2026/08/03/sketching-temporary-circuits-with-a-light-triggered-floquet-topological-insulator/

In semiconductor technology, a base material like silicon is permanently modified to induce certain electrical behavior. In comparison a topological insulator material could be used to create temporary circuits using …read more (https://hackaday.com/2026/08/03/sketching-temporary-circuits-with-a-light-triggered-floquet-topological-insulator/)

A Versatile PDP-11/70 Emulator
https://hackaday.com/2026/08/03/a-versatile-pdp-11-70-emulator/

The PDP-11 was a 16-bit minicomputer that was very influential in its time. That’s what inspired [vanheusden] to start working on an emulator for the machine in 2018, which has …read more (https://hackaday.com/2026/08/03/a-versatile-pdp-11-70-emulator/)

Yellow YAG Produces Powerful Pulses in Les’ Leftover Laser
https://hackaday.com/2026/08/04/yellow-yag-produces-powerful-pulses-in-les-leftover-laser/

[Les] likes lasing lasers, and who doesn’t? [Les] likes larger lasers than lots of folks, with his current project being an Nd:YAG (that’s Neodymium:Yttrium Aluminum Garnet) flash pumped laser intended …read more (https://hackaday.com/2026/08/04/yellow-yag-produces-powerful-pulses-in-les-leftover-laser/)

Testing Hundreds of Used LFP Cells Requires Some Automation
https://hackaday.com/2026/08/04/testing-hundreds-of-used-lfp-cells-requires-some-automation/

Although Li-ion cells have become a lot cheaper over the years, if you wish to buy hundreds of high-quality ones for that performance go-kart project, you may feel financially pressured …read more (https://hackaday.com/2026/08/04/testing-hundreds-of-used-lfp-cells-requires-some-automation/)

Road Trains Roam The Backroads of Australia
https://hackaday.com/2026/08/04/road-trains-roam-the-backroads-of-australia/