Hi I am trying to do this project from http://arduinobasics.blogspot.gr/2012/11/arduinobasics-hc-sr04-ultrasonic-sensor.html?showComment=1399056576259#c2818655084083635801 I did everything as shown and the result is the image below. When i hover my hand in the sensor nothing happens...what am i doi…

HC-SR04 Ultrasonic Sensor Simple Project

Topic		Replies	Views
HC-SR04 ultrasonic sensor + Arduino Mega = not working Sensors	2	12187	May 6, 2021
Ultrasonic distance sensor HC-SR04 Readings Low Sensors	4	2856	May 6, 2021
Help with HC-SR04 Ultrasonic Range Finder Sensors	5	5310	May 6, 2021
How do I check if ive got a faulty HC-SRO4? Sensors	10	8170	May 6, 2021
Ultrasonic sensor not working properly. Sensors	13	45948	May 6, 2021