Finding Simpler Schlieren Imaging Systems
https://hackaday.com/2025/10/06/finding-simpler-schlieren-imaging-systems/

Perhaps the most surprising thing about shadowgraphs is how simple they are: you simply take a point source of light, pass the light through a the volume of air to …read more (https://hackaday.com/2025/10/06/finding-simpler-schlieren-imaging-systems/)

Google Confirms Non-ADB APK Installs Will Require Developer Registration
https://hackaday.com/2025/10/06/google-confirms-non-adb-apk-installs-will-require-developer-registration/

After the news cycle recently exploded with the announcement that Google would require every single Android app to be from a registered and verified developer, while killing third-party app stores …read more (https://hackaday.com/2025/10/06/google-confirms-non-adb-apk-installs-will-require-developer-registration/)

A New Cartridge for an Old Computer
https://hackaday.com/2025/10/06/a-new-cartridge-for-an-old-computer/

Although largely recognizable to anyone who had a video game console in the 80s or 90s, cartridges have long since disappeared from the computing world. These squares of plastic with …read more (https://hackaday.com/2025/10/06/a-new-cartridge-for-an-old-computer/)

A Lorenz Teletype Shows Us Its Secrets
https://hackaday.com/2025/10/07/a-lorenz-teletype-shows-us-its-secrets/

When we use the command line on Linux, we often refer to it as a terminal. It’s a word with a past invoking images of serial terminals, rows of green-screened …read more (https://hackaday.com/2025/10/07/a-lorenz-teletype-shows-us-its-secrets/)

A Childhood Dream, Created and Open Sourced
https://hackaday.com/2025/10/07/a-childhood-dream-created-and-open-sourced/

Some kids dream about getting a pony, others dream about a small form factor violin-style MIDI controller. [Brady Y. Lin] was one of the latter, and now, with the skills …read more (https://hackaday.com/2025/10/07/a-childhood-dream-created-and-open-sourced/)

Smart Bulbs Are Turning Into Motion Sensors
https://hackaday.com/2025/10/07/smart-bulbs-are-turning-into-motion-sensors/

If you’ve got an existing smart home rig, motion sensors can be a useful addition to your setup. You can use them for all kinds of things, from turning on …read more (https://hackaday.com/2025/10/07/smart-bulbs-are-turning-into-motion-sensors/)

Can a Coin Cell Make 27 Volts?
https://hackaday.com/2025/10/07/can-a-coin-cell-make-27-volts/