New from IAS. Diode bracelets. The most common function of a diode is to allow an electric current to pass in one direction (called the diode's forward direction), while blocking current in the opposite direction (the reverse direction). Thus, the diode can be viewed as an electronic version of a check valve. Designed to keep stagnant energies awa while allowing a free flow of beneficial energy. Electrically written with black tourmaline and magnetic load stones.