Hello everyone. So, my project worked fine on the breadboard. But once soldered on the arduino it has decided not to work.
The pressure transducer outputs a frequency reading. If i connect a dmm to DI5 and the arduino ground, there is no reading. If i connect the dmm to DI5 and the battery ground I get a reading. If i connect the circuit to the serial port I get no readings, and I assume this has something to do with the grounding. If I ground the arduino gnd pin to the battery gnd, DI5 has a reading of zero. Any clues as to what I am doing wrong? (circuit diagram attached)
Do i have to add anything in between the battery and the arduino if I want to use the same battery to power the circuit as well as the arduino?