3D printing is wonderful, but sometimes you just don’t want to look at a plastic peice. Beethoven’s bust wouldn’t look quite right in front of your secret door if it …read more (https://hackaday.com/2026/01/23/pla-mold-to-plaster-bust-no-silicone-needed/)
Lead Acid Battery Upgraded to Lithium Iron Phosphate
https://hackaday.com/2026/01/23/lead-acid-battery-upgraded-to-lithium-iron-phosphate/
https://hackaday.com/2026/01/23/lead-acid-battery-upgraded-to-lithium-iron-phosphate/
Lithium batteries have taken over as the primary battery chemistry from applications ranging from consumer electronics to electric vehicles and all kinds of other things in between. But the standard …read more (https://hackaday.com/2026/01/23/lead-acid-battery-upgraded-to-lithium-iron-phosphate/)
Polymer Skins That Change Color and Texture When Exposed to Water
https://hackaday.com/2026/01/23/polymer-skins-that-change-color-and-texture-when-exposed-to-water/
https://hackaday.com/2026/01/23/polymer-skins-that-change-color-and-texture-when-exposed-to-water/
Researchers at Stanford University recently came up with an interesting way (Phys.org summary) to create patterns and colors that emerge when a polymer is exposed to water. Although the paper …read more (https://hackaday.com/2026/01/23/polymer-skins-that-change-color-and-texture-when-exposed-to-water/)
Beer Keg Plumbing for a Liquid Rocket
https://hackaday.com/2026/01/23/beer-keg-plumbing-for-a-liquid-rocket/
https://hackaday.com/2026/01/23/beer-keg-plumbing-for-a-liquid-rocket/
When you think of a high performance liquid rocket, what do you think of? Beer kegs? No? Well, when [Ryan] from the YouTube channel “Project KegRocket” saw a beer keg, …read more (https://hackaday.com/2026/01/23/beer-keg-plumbing-for-a-liquid-rocket/)
Environmental Monitoring on the Cheap
https://hackaday.com/2026/01/24/environmental-monitoring-on-the-cheap/
https://hackaday.com/2026/01/24/environmental-monitoring-on-the-cheap/
If there is one thing we took from [azwankhairul345’s] environmental monitor project, it is this: sensors and computing power for such a project are a solved problem. What’s left is …read more (https://hackaday.com/2026/01/24/environmental-monitoring-on-the-cheap/)
Isolated AC/DC Power Supply and Testing Station for 230 V Devices
https://hackaday.com/2026/01/24/isolated-ac-dc-power-supply-and-testing-station-for-230-v-devices/
https://hackaday.com/2026/01/24/isolated-ac-dc-power-supply-and-testing-station-for-230-v-devices/
When you’re testing or debugging some mains-powered gear, plugging it directly into the outlet can often be an exciting proposition. If such excitement is not really your thing, you can …read more (https://hackaday.com/2026/01/24/isolated-ac-dc-power-supply-and-testing-station-for-230-v-devices/)
Al and I were talking about the IBM 9020 FAA Air Traffic Control computer system on the podcast. It’s a strange machine, made up of a bunch of IBM System …read more (https://hackaday.com/2026/01/24/crazy-old-machines/)