To test the operation of the massager, a simulation was done on Proteus indicating the inflation and deflation of the massaging bag. The process of inflation and deflation on the limb results to a massaging effect. The device presumed safety to the user by automation and controls included in the circuit and the system. The arduino creates an automation making the operation easier while relay controls the solenoid to enhance entry of air and pressure.
In the simulation figure below the green LEDs indicates inflation while yellow LEDs indicates deflation. They are automated and alternated to bring a massaging effect.

Figure 1