Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

Arduino Relay Driver Shield Circuit Diagram: In this 3-Channel Relay Driver Circuit, we have used an optocoupler to trigger the NPN transistor which further drives the relay. And optocoupler will be ...

In this Lora project, I have shown how to make the LoRa Arduino ESP8266 control relay using the RYLR896 LoRa module with real-time feedback. ... After that, I have soldered all the components as per ...

The Arduino sketch enables you to configure an almost unlimited number of on/off times for the relay. This is controlled through the NUMSLOTS and slots options. The slots array contains one or more ...

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...

Block diagram of the voice-controlled home automation system is shown in Fig. 2. Fig. 1: Screenshot of Bluetalk app Fig. 2: Block diagram of the voice-controlled home ... Disconnect the serial cable ...

A “9VDC/225 Ohm” Electro-Magnetic Relay was used in the prototype. Contact Capacity of the relay (resistive Load) is 10A 250VAC/10A 30VDC; Panic Alarm Interface Circuit Schematic. Panic Alarm Arduino ...

Lightning Protection Device – Circuit Diagram. Now connect the component according to the circuit diagram given below. Here we connected Arduino Nano, Relay, and an AS3935 sensor together. Circuit ...