I just received my RC522 RFID reader and made this simple Arduino access control system that uses the reader, a buzzer for the alarm and a relay shield for the security system. The relay can be used ...

Besides the mosquito killer, which plugs into a wall socket, he used a real-time clock (or RTC module) to report the time, a relay shield for controlling the on/off state of the mosquito coil, the ...

The heavy lifting is handled by an Arduino Mega 2560, ... So he added a self-made simple relay shield on a prototype board to it and was almost done. Quite funny, ...

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 ...

Custom shield with relays, transistors, power supplies, and an operational amplifier USB cable for programming the Arduino Laptop with Visual Studio Code and PlatformIO extension installed ...

The finished project will switch 240v so they’ve used a transformer to power the logic circuitry and a solid state relay to handle the load switching, with a Dallas 1820 for temperature data.

The best Arduino shields for IoT applications provide a host of features designed for ... Digital Loggers IoT Relay 2; Adafruit Motor/Stepper/Servo Shield V2; Adafruit AirLift Shield with ESP32 Wi ...

The associated demonstration code continually streams increasing integer values through the Arduino UART to the transmitter, and receives them back via the fibre link. “To show this running, we put a ...