Weak signal from far sensors

Projects General Guidance
1

Hi everyone
I have the an Arduino nano project that is connected to a load cell and an ultrasonic sensor, and here is the diagram

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I'm planning for the actual thing so the the ultrasonic sensor and the load cell to be far from the arduino nano at about 1 meter for the load cell amplifier and 2,5 meters for the ultrasonic sensors
the question what the effect of the distance on the strength of the signal , would it make it weaker so the readings from the sensor would be faulty, and in such case what the is the solution?

2

No, with these components there should not be a problem.

If your i2c display is 2.5m away from the Arduino, that might be a problem. But even that can be fixed.

3

The actual distance is irrelevant. What is important is how long are the connecting wires and how are the routed, what other electrical devices are they near, and are the signal wires twisted with a ground wire.

4

@Paul_KD7HB
the wires are for both sensors are connected to the ground pin of the Arduino but not twisted with a dedicated ground wire. the proposed length for the 4 wires of the ultrasonic sensor about 2 .5 meters and for the load cell amplifier 4 about 4 meters,
and regarding environment it's full of all sorts of electronic and electrical devices .

5

@PaulRB
so the wire length of the wires for both the load cell unit and the ultrasonic sensor will not be a problem for my project .

6

And when they cause your project to fail, what then?

7

I think covering the wires with an insulating tape would protect from the noise in the environment

8

This project will not end well.

9

What do you suggest to solve this issue?

10

Draw a schematic of your system. Indicate the power/ground wires. Mark the wires that carry analog signals. Mark the wires that carry digital signals.

How many different voltages will you need, so you know how many power/ground wires you need?

Each wire with an analog signal will need a ground wire twisted together with it.

Each digital signal wire can be by itself.

The total wire count will need to be shielded with a braided metal shield that is grounded at only the Arduino end.

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