Good morning,

Today we present to you an electronic project consisting of an alarm that is activated when it detects an object less than 40 centimetres away.

The elements are:

Arduino.
Protoboard
Cables
Ultrasonic sensor
Speaker

The operation is as follows:

When the sensor detects an object less than 40 cm away, it sends a HIGH signal to pin 2 of the Arduino, which we have programmed to send in that case a HIGH signal, through pin 3 that activates the speaker in order to sound the alarm.

This way the parking sensors work, also a Lunar Rover, could use it not to collide with rocks.

Click here to see the project