The complete circuit diagram for the Arduino Whistle Detector Switch circuit using Sound Sensor is show below. ... /*Arduino Whitsle Detector Switch Program * Detects the whistles from pin 8 and ...

Circuit Diagram and Explanation: In this Arduino Alcohol Detector Shield we have used a MQ3 sensor to detect present alcohol level in the breath. A 16x2 LCD is used for displaying the PPM Value of ...

A password-based circuit breaker or PBCB is an electrical switch operated through a user-defined password, providing a secure and controlled means of activating or deactivating an electronic circuit.

On startup the gate is closed until the limit switch is hit and then opens until it is just out of range of the switch. This ensures that the gate closes if the system lost power while the gate was ...