Monitor Voltage variation of Pneumatic valve through pressure sensor

[Terdy56]

Hello, I have 2 wired solenoid valve use for pressure system, and there is Valve controller present in industry which is easy to connect with raspberry pi but I need to know the best way to monitor the voltage variation as I wanted to control this pressure valve using pressure sensor any kind of theoretical help to make this solution possible will be helpful .

[B.Goode]

I need to know the best way to monitor the voltage variation

All the I/O connections on the 40-way header of an RPi are digital and can represent (or respond) to 2 voltage levels representing On/Off, True/False etc. The highest voltage you can connect is 3.3v DC.

To deal with variable voltage you will need an external Analogue-to-digital convertor (ADC.)

[Terdy56]

Hello B.Goode,
thanks for the reply is there any kind of ADC hardware or any circuit suggestion on which i should try it out?

[Brandon92]

It's depands on what you want, for example, the sample speed, how accurate the measurement needs to be. But here is a nice introduction to do this.
But, in what kind of environment are you going to use it?

[B.Goode]

is there any kind of ADC hardware or any circuit suggestion on which i should try it out?

The gpiozero Python library module installed by default in recent versions of the Raspbian Operating System has built-in support for the MCP30xx family of ADC chips, and a simple 'recipe' to demonstrate its use including a wiring diagram: https://gpiozero.readthedocs.io/en/stab ... entiometer

(In case the jump within the link does not work, you need Section 2.25. Potentiometer)