As computers have gotten smaller and less expensive over the years, so have their components. While many of us got our start in the age of through-hole PCBs, this size …read more (https://hackaday.com/2025/04/22/game-boy-pcb-assembled-with-low-cost-tools/)

DIY Record Cutting Lathe is Really Groovy
https://hackaday.com/2025/04/22/diy-record-cutting-lathe-is-really-groovy/

Back in the day, one of the few reasons to prefer compact cassette tape to vinyl was the fact you could record it at home in very good fidelity. Sure, …read more (https://hackaday.com/2025/04/22/diy-record-cutting-lathe-is-really-groovy/)

British Wartime Periscope: a Peek Into the Past
https://hackaday.com/2025/04/22/british-wartime-periscope-a-peek-into-the-past/

We all know periscopes serve for observation where there’s no direct line-of-sight, but did you know they can allow you to peer through history?  That’s what [msylvain59] documented when he …read more (https://hackaday.com/2025/04/22/british-wartime-periscope-a-peek-into-the-past/)

eInk PDA Revisited
https://hackaday.com/2025/04/22/eink-pda-revisited/

In the dark ages, before iOS and Android phones became ubiquitous, there was the PDA. These handheld computers acted as simple companions to a computer and could often handle calendars, …read more (https://hackaday.com/2025/04/22/eink-pda-revisited/)

How Supercritical CO2 Working Fluid Can Increase Power Plant Efficiency
https://hackaday.com/2025/04/22/how-supercritical-co2-working-fluid-can-increase-power-plant-efficiency/

Multi-stage steam turbine with turbo generator (rear, in red) at the German lignite plant Boxberg (Credit: Siemens AG)
" data-medium-file="https://hackaday.com/wp-content/uploads/2023/04/Turbogenerator01.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2023/04/Turbogenerator01.jpg?w=800">Using steam to produce electricity or perform work via steam turbines has been a thing for a very long time. Today it is still exceedingly common to use steam in …read more (https://hackaday.com/2025/04/22/how-supercritical-co2-working-fluid-can-increase-power-plant-efficiency/)

Virtual Nodes, Real Waves: a Colpitts Walkthrough
https://hackaday.com/2025/04/22/virtual-nodes-real-waves-a-colpitts-walkthrough/

If you’ve ever fumbled through circuit simulation and ended up with a flatline instead of a sine wave, this video from [saisri] might just be the fix. In this walkthrough …read more (https://hackaday.com/2025/04/22/virtual-nodes-real-waves-a-colpitts-walkthrough/)

A Scratch-Built Commodore 64, Turing Style
https://hackaday.com/2025/04/23/a-scratch-built-commodore-64-turing-style/

Building a Commodore 64 is among the easier projects for retrocomputing fans to tackle. That’s because the C64’s core chipset does most of the heavy lifting; source those and you’re …read more (https://hackaday.com/2025/04/23/a-scratch-built-commodore-64-turing-style/)

Unsolved Questions in Astronomy? Try Dark Matter!
https://hackaday.com/2025/04/23/unsolved-questions-in-astronomy-try-dark-matter/