In order to use the ESP-01 Wi-Fi relay module, a programmer/programming adapter is required to program the ESP-01 module (see below). Also it is pretty easy to make your own programmer, or you can ...

The Raspberry Pi is a credit card-sized computer capable of running full-fledged Linux distributions such as Raspberry Pi OS, ...

This Arduino Uno setup can be powered by a 6F22 9V battery ... This is a low-level 5VDC 2-channel relay module with a standard interface that can be controlled directly by a microcontroller. Each ...

The Arduino acts as the brains of the operation while an off-the-shelf NFC/RFID reader module is used to read ... the Arduino triggers a relay which can then be used to control just about anything.