This project involves using an Arduino to measure distances using an ultrasonic sensor and controlling a buzzer and LED based on the measured distance. The provided Arduino code performs the following ...

Each buzzer consists of an Arduino Pro Mini 3.3 V, a nRF24L01, ... The LED on the appropriate buzzer box is illuminated so the players know who got in first.

This project uses an RFID module (RC522) to create an access control system with Arduino. The system checks RFID tags against a stored authorized UID and provides visual and audio feedback based on ...

Now attach a breadboard on one side of the wooden board and fix the Arduino nano in the breadboard. Connect the piezo buzzer and an LED in the parallel configuration on the breadboard. Connect their ...

The product page for that buzzer says "current consumption: 20 mA" These piezo buzzers can be corrected directly to a DC supply. There is no need for a current-limiting R (as for an LED).

Smart Blind Stick using Arduino Circuit Diagram. The below circuit diagram shows the complete hardware wiring setup of the Arduino-based Smart Walking Stick for the Blind people, detailing how the ...

Make sure to connect positive pin(+) of buzzer to Arduino digital pin 7 and negative pin(-) to Arduino GND. In same cases, you may want to connect 100ohm series resistor between buzzer positive(+) pin ...

Insert the Arduino Nano and MQ-2 smoke sensor in the breadboard. Power up the sensor through Arduino and connect the A0 pin of the sensor to A5 of Arduino. Connect a buzzer and an LED in a parallel ...