I would like to add three more HC-SR04 sensor
Currently I have combined the Arduino UNO R3 with the AR 293d(refer to below graph), and pluged in one HC-SR04 sensor to the SRO4 hole at the left top corner. So I need to find the holes for t3 more sensor.
I have done some research already , for the connection , found more document
HC-SR04 Arduino Vcc +5V Trig GPIO Echo GPIO GND GND
The questions are ,
1) From the above graph, is that mean I can only add two more sensor to the board , since there are only 2 more 5V, GND , 12 , 13 pins (at the top and bottom holes)
2) How can I connect them separately ? That means, what I need to connect from sensor to the board?
3) If I need other board eg. breadboard to connect them, How should I connect sensor to breadboard and how can I connect it with the main board(AR 293d)?
Thanks a lot for helping. Any answer is useful for me