Although much diminished now, the public switched telephone network was one of the largest machines ever constructed. To make good on its promise of instant communication across town or around …read more (https://hackaday.com/2025/01/30/retrotechtacular-the-tyranny-of-large-numbers/)

Comparing Adhesives for Gluing PETG Prints
https://hackaday.com/2025/01/30/comparing-adhesives-for-gluing-petg-prints/

PETG is a pretty great material to print 3D models with, but one issue with it is that gluing it can be a bit of a pain. In a recent …read more (https://hackaday.com/2025/01/30/comparing-adhesives-for-gluing-petg-prints/)

Copper Candle Burns Forever… Just add Fuel
https://hackaday.com/2025/01/30/copper-candle-burns-forever-just-add-fuel/

[Zen Garden Oasis] wanted to heat and light a space using a candle. But candles aren’t always convenient since they burn down and, eventually, you must replace them. So he …read more (https://hackaday.com/2025/01/30/copper-candle-burns-forever-just-add-fuel/)

Patching Up Failing Hearts With Engineered Muscle Tissue
https://hackaday.com/2025/01/30/patching-up-failing-hearts-with-engineered-muscle-tissue/

As the most important muscle in our body, any issues with our heart are considered critical and reason for replacement with a donor heart. Unfortunately donor hearts are rather rare, …read more (https://hackaday.com/2025/01/30/patching-up-failing-hearts-with-engineered-muscle-tissue/)

The Jell-O Glow Tensegrity Toy You Didn’t Know You Needed
https://hackaday.com/2025/01/30/the-jell-o-glow-tensegrity-toy-you-didnt-know-you-needed/

If you’re looking to add a pop of glowing whimsy to your workspace, check out this vibrant jiggly desk toy by [thzinc], who couldn’t resist the allure of Adafruit’s NOODS …read more (https://hackaday.com/2025/01/30/the-jell-o-glow-tensegrity-toy-you-didnt-know-you-needed/)

Handy Online Metric Screw, Nut, and Washer Generator
https://hackaday.com/2025/01/31/handy-online-metric-screw-nut-and-washer-generator/

For those times when you could really use a quick 3D model, this metric screw generator will do the trick for screws between M2 and M16 with matching nuts and …read more (https://hackaday.com/2025/01/31/handy-online-metric-screw-nut-and-washer-generator/)

A History of Copper Pours
https://hackaday.com/2025/01/31/a-history-of-copper-pours/

If you compare a modern PCB with a typical 1980s PCB, you might notice — like [lcamtuf] did — that newer boards tend to have large areas of copper known …read more (https://hackaday.com/2025/01/31/a-history-of-copper-pours/)