Circuit Diagram: Relay module: Connect the IN pin of the relay to a GPIO pin (e.g., D1 or GPIO5). ESP8266 or ESP32: Make sure the relay module's VCC and GND are properly connected to the board.

Just power the relay module using the Vcc and ground pin and connect the signal pin of the module to pin 3 of the 555 timer. Connect the Common (C), Normally Open (NO) and the Normally Closed (NC) ...

The relay module typically includes several channels, allowing multiple devices to be controlled with a single module. It can be controlled by a microcontroller such as the Arduino UNO. This is a 5V, ...

Fig. 3: Circuit diagram of the voice-controlled home automation system Bluetooth module HC-05 transmits and also receives data serially via Board1 that can be read by the microcontroller (MCU). A ...

Fig. 6: Connection for Automatic Contactless Switch For Smart Home Fig 7. Connection inside the board Testing of the Contactless Switch Now, power the device and the relay. When you move your hand in ...