It’s a surprisingly complex circuit with a lot of filter components and a mild mystery surrounding the use of a GPIO to pulse the receive side of its detector through a capacitor. One thing led ...

At its core, the ESP32 chip is not much more than an integrated circuit, a huge mass of transistors ... type for easy access to things like USB and GPIO. But these tiny chips need little in ...

Raspberry Pi fans have long wished for a power button. The Raspberry Pi 5 delivers. But what if you have an older model?

The system allows users to wirelessly control multiple AC appliances like lights and fans through an interactive web interface ...

The GPIO cell set can be configured as input or output and has an internal 50Kohm pull-up or pull-down resistor. Cells for I/O and core power and ground with built-in ESD circuitry are included. A ...