I would like to design an umbrella system that will be attached to your table for outdoor restaurants that works upon a rain sensor system for my final year project. So, in case while you are having a wonderful meal and suddenly it rains, you dont have to worry as the umbrella will automatically activate. Since im in the mechanical field, I dont have much knowladge in the electrical section. My design includes a water sensor at the tip of the umbrella to collect rain drop and to send the signal to the hydraulic pump (small type) that will open up the umbrella. My question here is is it possible to use a hydraulic pump or is there any other solution ..? Also, after the sensor detects the rain, how does it send impulse in order for the pump to work...??Please help me...Your help is much appreciated.. Thank You... Edit by Borek: email removed.