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 ...

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 ...

Arduino Motion Sensor – Circuit and Working. The circuit diagram of the automation device using a motion sensor is shown in Fig. 2. It consists of an Arduino Nano board (MOD1), a PIR sensor (S1), a ...

Relay control in real time using arduino and RTC. Used in Fishtank lighting, Plant irrigation. Time values specified in structure ON - OFF sequence. Also manually can override ON/OFF sequence using ...

Complete schematic for building a DIY Humidifier using Arduino is given here: Let us learn the circuit diagram in detail. As shown, first of all a 12V DC power supply is converted into 5V DC power ...

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 ...

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 ...