ICStation team introduce you this Ultrasonic Distance Display ISD1820 Voice Alarm System based on ICStation UNO.This system works under 5V power supply, uses the Ultrasonic Module HC-SR04 Distance Transducer Sensor to detect the distance between the Module and the measured object. When the Ultrasonic Module detects the distance is larger than the maximum, the loudspeaker will not alarm. When the Ultrasonic Module detects the distance is smaller than the maximum, the loudspeaker will alarm. The distance data will be displayed on the LCD1602.This system can be made easily with low cost and it is suitable for automobile and Workshop and so on.
1)When start up, the hardware initializes, the LCD1602 displays the interface we set before.
2)When the Ultrasonic Module detects that the distance is larger than the maximum, the loudspeaker does not alarm.
3)When the Ultrasonic detects the distance is smaller than the maximum, the loudspeaker alarms.
4)Use the ISD1802 Voice Module to change the alarm voice content.
Code for reference：
Step 1: Component Lists:
4.1×5V Power Supply
Step 2: Schematic Diagram
Step 3: Connect the 5V Power Supply and the GND of the ICStation UNO to the Bread Board.
The red line is for power supply, the black one is for GND.