The HC-SR04 is directly connected to an Arduino board with the receiver end(echo) connected to analog pin 2 and the transmitter (trigger) connected to digital pin 4.
I am wondering if I can use the sensor to sense the change in saturation from when object block its path. The receiver and transmitter will be positioned like this
The line in the middle is supposed to be a paper. I'll be using it to see the difference between one paper and two paper when they travel trough the two.
Now I'm not sure if this is possible but the way I see it working is kind of similar to an IR LED Arduino program connected to an LED, where when one paper passes trough the light gets a little bit weaker and with two it takes a heavier hit.
Is this possible?