Archive for October 2025

Dangerous battery charging circuit

I saw this circuit at Facebook at https://www.facebook.com/share/p/1AC9zDA8gR/ I hv been seeing circuits like this i will be wondering what a hell are they publishing like this without shame ! Dangerous, do not use ! This is what I call an “automatic house ingnitor circuit” Lithium battery exploder circuit That looks like a one way →

Qualcomm buys Arduino

Who saw THIS coming? Qualcomm just acquired Arduino! And they’re making a new SBC, the Uno Q! Press Note Qualcomm to Acquire Arduino—Accelerating Developers’ Access to its Leading Edge Computing and AI “Acquisition to combine Qualcomm’s leading-edge products and technologies with Arduino’s vast ecosystem and community to empower businesses, students, entrepreneurs, tech professionals, educators and →

USB charger bad

Another bad and potentially dangerous circuit from Facebook. This is supposed to charge LiIon battery from USB power. Identified problems: – no current limiting – can overcharge the battery – red charging LED will be always on when there is USB power coming in – green charged LED will not turn on when battery is →