solenoid control

Hi, I'm new here and this is my first post. I would be grateful if you can help me with this circuit. I attached a circuit I designed for hitting a small electrovalve at 24V and then hold voltage at 5V. The manufacturer give these voltages to work and I have a switching source from which get...

I am currently working on a project that is using two solenoids that will pull and hold closed by the wave of a hand. The solenoids would hold closed until a hand is waved again max closed time would be around 3 mins. I am having trouble finding a sensor that will work with the solenoids that I...