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 ...

The circuit is connected on breadboard as per the Circuit Diagram. However one must pay attention during connecting the LED terminals. Although the buttons can show bouncing effect but in this case it ...

This diagram showcases the circuit setup without the use of a breadboard however, it is recommended to use one if you testing the circuit before making the final project. With this PBCB System, you ...