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Electronics Projects After Retirement 7: Attempting Heart Rate Measurement. Optical Heart Rate Sensor Measurement Edition

During the COVID-19 pandemic, I was frequently measuring my body temperature and blood oxygen levels. Based on information that it was possible to take an electrocardiogram (ECG) using the ECG app on ...
note

[Kato RC #29] The Day AI Started Living in a Microcontroller for $44 — How the Arduino UNO Q Changed the 'Definition of Electronics Hobbyism'

In October 2025, Qualcomm acquired Arduino. At that moment, shockwaves ran through the maker community worldwide. 'Arduino is dead,' 'This is the end of open source.' Reddit erupted, and the Hacker ...
Hackaday

Hack Improves Cheap Speed Controllers

Tony Goacher] has worked with a lot of cheap brushless DC motor controllers built in China. They can be very cost-effective, ...

5 Things Google’s Nano Banana 2 Lite Reveals About the Future of AI Images

Google’s Nano Banana 2 Lite shows how faster, cheaper AI image generation could reshape creative workflows and business tools ...
Hackaday

slide projector

Slides make for great old-timey fun, but it’s awesome to have a digital backup of your old photos, too. An automatic digitizer can make quick work of your collection, and this build from [rbwood53] ...