note

[Arduino] Checking if the room light is on from the outside. Building a "Door-Through Lighting Indicator" that runs with auto-calibration and ultra-low power consumption

Have you ever been in a situation, whether in a conference room, a private office, or a room in your own home, where you can't tell if someone is inside (or if the light is on) from the outside ...
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

USB blaster

Using an external MCU as a crude clock source for the Altera CPLD. (Credit: [Doug Brown]) One exciting feature of hardware development involving MCUs and FPGAs is that you all too often need specific ...
Hackaday

programming jig

Folks from [Adafruit] are showing off a neat hack – USB host on RP2040, using the now-famous PIO peripheral. [Adafruit] builds a lot of RP2040 boards, and naturally, you gotta test them before you ...