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3 impressive ESP32 projects to make this weekend (Jun 19 - 21)

It's amazing what you can do with an ESP32 (or two).
GitHub

Simple to use Arduino library to interface matrix keypads.

Blocking or non-blocking read; Supports any number of rows and columns; User defined key mapping; prevents reading the same event twice. A matrix keypad will have some pins or wires that you have to ...
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 ...
GitHub

SmartMatrix Library for Teensy 3, Teensy 4, and ESP32

SmartMatrix Library is designed to refresh HUB75 LED matrix panels and APA102-compatible addressable LEDs with high quality graphics, using simple Arduino sketches. 128x64 HUB75 Panel Driven with ...
Hackaday

diy electronics

Many readers will be familiar with Microchip’s ATtiny85, which has been a popular choice for DIY projects in the past for its low price and (for the time) small size. But those looking for a more ...