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/

No doubt many readers have at times wished to try their hand at blacksmithing, but it’s fair to say that acquiring an anvil represents quite the hurdle. For anyone not …read more (https://hackaday.com/2025/04/17/a-blacksmith-shows-us-how-to-choose-an-anvil/)

Rise of the Robots: How Robots Are Changing Dairy Farms
https://hackaday.com/2025/04/17/rise-of-the-robots-how-robots-are-changing-dairy-farms/

Running a dairy farm used to be a rather hands-on experience, with the farmer required to be around every few hours to milk the cows, feed them, do all the …read more (https://hackaday.com/2025/04/17/rise-of-the-robots-how-robots-are-changing-dairy-farms/)

Tiny, Hackable Telepresence Robot for under $100? Meet Goby
https://hackaday.com/2025/04/17/tiny-hackable-telepresence-robot-for-under-100-meet-goby/

[Charmed Labs] are responsible for bringing numerous open-source hardware products to fruition over the years, and their latest device is an adorably small robotic camera platform called Goby, currently crowdfunding …read more (https://hackaday.com/2025/04/17/tiny-hackable-telepresence-robot-for-under-100-meet-goby/)

Track Your Circuits: A Locomotive PCB Badge
https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/

This fun PCB from [Nick Brown] features a miniature railroad implemented with 0805-sized LEDs. With an eye towards designing his own fun interactive PCB badge, the Light-Rail began its journey. …read more (https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/)

D20-shaped Quasicrystal Makes High-Strength Alloy Printable
https://hackaday.com/2025/04/18/d20-shaped-quasicrystal-makes-high-strength-alloy-printable/