Block Diagram. Circuit Setup. Buzzer Module Connection: Connect the positive terminal (+) of the buzzer module to any digital pin (e.g., pin 2) on the Arduino Nano. Connect the negative terminal (-) ...

Fig. 1: Circuit diagram of the car reversing audio visual alarm Fig. 2: Ultrasonic ranging module HC-SR04. Pins 16 and 17 of IC1 are connected to Trigger and Echo pins of the ultrasonic module. Pin 18 ...

Components Required: Arduino Uno RFID Reader (RC522) Servo Motor (SG90 or similar) 16x2 LCD (I2C or parallel interface) 3 LEDs (Red, Yellow, Green) Piezo Buzzer (2 pins) Resistors (220Ω for LEDs) ...

The Circuit diagram of smart whistle counter is shown in figure-1, It is based on Arduino Mega 2560 board. LM393 based sound sensor module is used for detection of sound of whistle. It operates at 5V ...