Solenoid Valve for Fluid Control (3/4 Inch) 9volt or other solid surface

or other solid surface

cable is super handy for anyone doing RF work

Oxygen concentration and flow rate medical sensor datasheet

Then the Arduino Pro Mini is the solution

TIP42C Transistor datasheet

Solenoid Valve for Fluid Control (3/4 Inch) 9volt or other solid surfaceThis 3 4 inch electric solenoid valve powered by 12 Volt DC with Filters on inlet and outlet ports are great for projects! These types of valves are often used for automatic fluid circulation. Technical Specifications Working voltage DC12V Maximum current 500 mA Operating Mode Normally Closed Inlet Outlet Ports external diameter 3 4"(19mm) Materials Stainless Steel Polyoxymethylene Filter Screen Stainless Steel Inlet Filter Temperature Limitations