How to develop ... scales?

Question

Programming

The question is rather unusual, I suppose. In general, I am a graduate with an appropriate specialty (computer engineering = boards, circuits, etc.), but I think you yourself know what level of knowledge universities provide - a lot of theory and not a drop of any kind of practice. Therefore, I have no idea from which side to even approach the issue.
In more detail, it is necessary to develop the simplest electronic scales (weight up to 1 kg) with the ability to transmit the weighing result via bluetooth / usb / wi-fi etc.
If anyone can at least push in which direction to google (what elements are needed, the principle of how this can be implemented) would be incredibly grateful

Answer 1

1. Look for a suitable weight sensor, such as www.seeedstudio.com/wiki/index.php?title=Weight_Se...
2. Read the information on this sensor, what data acquisition interface it has - analog, digital, its parameters.
3. Look for a suitable device to receive information from this sensor and transmit it via bluetooth / usb / wi-fi etc wherever you need.
Such a device can be:
a. Arduino
b. A debug board on some kind of microcontroller, such as STM32F4DISCOVERY
c. A single board computer like Raspberry_Pi
4. Thinking about how to pair the sensor with a single board computer. If necessary, implement a pairing scheme.
5. Write a program for a single-board computer.
Offhand, the Arduino option seems to be the least time consuming.

Answer 2

Tensometry
You can start with an experimental layout on arduino.

Answer 3

Google needs to change the inductance, resistance, capacitance.
Mechanical work turns the slider of the potenimeter, inserts the plates, placing a charge between them, or placing the core in the coil to change the induction current.
In addition, no one has canceled step encoders: the greater the weight, the more the spring will compress and the more steps the encoder will take.