Using a MIG Welder, Acetylene Torch, and Air Hammer to Remove a Broken Bolt
https://hackaday.com/2025/04/16/using-a-mig-welder-acetylene-torch-and-air-hammer-to-remove-a-broken-bolt/

If your shop comes complete with a MIG welder, an acetylene torch, and an air hammer, then you have more options than most when it comes to removing broken bolts. …read more (https://hackaday.com/2025/04/16/using-a-mig-welder-acetylene-torch-and-air-hammer-to-remove-a-broken-bolt/)

Modernizing an Enigma Machine
https://hackaday.com/2025/04/17/modernizing-an-enigma-machine/

This project by [Miro] is awesome, not only did he build a replica Enigma machine using modern technologies, but after completing it, he went back and revised several components to …read more (https://hackaday.com/2025/04/17/modernizing-an-enigma-machine/)

Budget Schlieren Imaging Setup Uses 3D Printing to Reveal the Unseen
https://hackaday.com/2025/04/17/budget-schlieren-imaging-setup-uses-3d-printing-to-reveal-the-unseen/

We’re suckers here for projects that let you see the unseeable, and [Ayden Wardell Aerospace] provides that on a budget with their $30 Schlieren Imaging Setup. The unseeable in question …read more (https://hackaday.com/2025/04/17/budget-schlieren-imaging-setup-uses-3d-printing-to-reveal-the-unseen/)

Bicycle Gearbox Does it by Folding
https://hackaday.com/2025/04/17/bicycle-gearbox-does-it-by-folding/

If you’ve spent any time on two wheels, you’ve certainly experienced the woes of poor bicycle shifting. You hit the button or twist the knob expecting a smooth transition into …read more (https://hackaday.com/2025/04/17/bicycle-gearbox-does-it-by-folding/)

Supercon 2024: Exploring the Ocean with Open Source Hardware
https://hackaday.com/2025/04/17/supercon-2024-exploring-the-ocean-with-open-source-hardware/

Created with GIMP
" data-medium-file="https://hackaday.com/wp-content/uploads/2025/04/buoy24_feat.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2025/04/buoy24_feat.jpg?w=800">If you had to guess, what do you think it would take to build an ocean-going buoy that could not only survive on its own without human intervention for more …read more (https://hackaday.com/2025/04/17/supercon-2024-exploring-the-ocean-with-open-source-hardware/)

Designing an FM Drum Synth from Scratch
https://hackaday.com/2025/04/17/designing-an-fm-drum-synth-from-scratch/

How it started: a simple repair job on a Roland drum machine. How it ended: a scratch-built FM drum synth module that’s completely analog, and completely cool. [Moritz Klein]’s journey …read more (https://hackaday.com/2025/04/17/designing-an-fm-drum-synth-from-scratch/)

A Blacksmith Shows Us How To Choose An Anvil
https://hackaday.com/2025/04/17/a-blacksmith-shows-us-how-to-choose-an-anvil/