Controlling a 24V pneumatic valve to arduino?

Other Hardware Motors, Mechanics, Power and CNC
8

The best interface I can think of would be:

  1. Controller with 24V ps
  2. Arduino with 5 to 12v ps
  3. both of the above MUST have a common ground.

Setpoint:

  • Arduino output "analogout" (I forget the command).
  • RC filter on this output. The analog output is really a PWM output and needs to be filtered to become a DC voltage
  • An opamp capable of being powered by 32 volts. (24 + some safety margin). Something like an LM324 (aka LM2902)
  • Various capacitors on the opamp (+V, maybe a feedback cap to slow down any spikes)
  • Set amplifier gain to ~2.5.
  • The output of the opamp will be approx 0 to (2.5 x 4)

Feedback:

  • Feedback will need a resistive divider with a 0.1µf cap before going into an analog input.