Simple unobvious flag that make a change to use ESP32-S3 with PSRAM at industrial operating temperature range.

Important note about standard 4-pin PC fan when using PWM signal to control it.

Small thing, that could damage your devices and should be taken into account when using isolated DC-DC modules.

How to deal with addressable RGB LED (like WS2812B) when you have only 3.3V rail?

It's logical to just connect PHY to Ethernet switch using RJ45 Cat cable, but for real schematic you will want to use optimized solution without additional isolation transformer.

JLCPCB and EasyEDA have huge library of components (maybe one the big in the world), so why not try to use their footprints for your designs in KiCad?

Tiny ESP32-C3 development board has USB support for serial communication, but it's not work in Platformio without by default. Here is simple solution to fix ESP32-C3 with Platformio.

Let's take a look at the Chinese cheap (but no bad) controller for brushless motors (BLDC) with full water protection and aluminum case-heatsink.

Example of the custom aluminum board with LEDs and USB-C power port and additional optional temperature monitoring sensors (both digital and analog).

Let's take a look at the simple example of using interrupt from hardware timer to generate signal at the one of the GPIO pin.

Demonstration of the Power Good (PG) pin working of DC-DC converter and where it could be useful

New interesting simple solution for high current applications, that can be used with ordinary FR-4 PCBs.