Using digital techniques has caused a resurgence of interest in VLF — very low frequency — radio. Thanks to software-defined radio, you no longer need huge coils. However, you still …read more (https://hackaday.com/2025/09/04/optimizing-vlf-antennas/)

Returning To An Obsolete Home Movie Format
https://hackaday.com/2025/09/04/returning-to-an-obsolete-home-movie-format/

A few years ago, I bought an 8 mm home movie camera in a second hand store. I did a teardown on it here and pulled out for your pleasure …read more (https://hackaday.com/2025/09/04/returning-to-an-obsolete-home-movie-format/)

Designing an Open Source Micro-Manipulator
https://hackaday.com/2025/09/04/designing-an-open-source-micro-manipulator/

When you think about highly-precise actuators, stepper motors probably aren’t the first device that comes to mind. However, as [Diffraction Limited]’s sub-micron capable micro-manipulator shows, they can reach extremely fine …read more (https://hackaday.com/2025/09/04/designing-an-open-source-micro-manipulator/)

Tips for Homebrewing Inductors
https://hackaday.com/2025/09/04/tips-for-homebrewing-inductors/

How hard can it be to create your own inductors? Get a wire. Coil it up. Right? Well, the devil is definitely in the details, and [Nick] wants to share …read more (https://hackaday.com/2025/09/04/tips-for-homebrewing-inductors/)

Repairing a Tektronix 577 Curve Tracer
https://hackaday.com/2025/09/04/repairing-a-tektronix-577-curve-tracer/

Over on his YouTube channel our hacker [Jerry Walker] repairs a Tektronix 577 curve tracer. A curve tracer is a piece of equipment which plots I-V (current vs voltage) curves, …read more (https://hackaday.com/2025/09/04/repairing-a-tektronix-577-curve-tracer/)

TFINER is an Atompunk Solar Sail Lookalike
https://hackaday.com/2025/09/04/tfiner-is-an-atompunk-solar-sail-lookalike/

It’s not every day we hear of a new space propulsion method. Even rarer to hear of one that actually seems halfway practical. Yet that’s what we have in the …read more (https://hackaday.com/2025/09/04/tfiner-is-an-atompunk-solar-sail-lookalike/)

Powering a Submarine with Rubber Bands
https://hackaday.com/2025/09/04/powering-a-submarine-with-rubber-bands/

A look underneath the water’s surface can be fun and informative! However, making a device to go under the surface poses challenges with communication and water proofing. That’s what this …read more (https://hackaday.com/2025/09/04/powering-a-submarine-with-rubber-bands/)

Capture and Plot Serial Data in the Browser
https://hackaday.com/2025/09/05/capture-and-plot-serial-data-in-the-browser/