1. The problem statement, all variables and given/known data Where can i study about those projects in which silicon and germanium use as a diode with their purpose in the appropriate project? 3. The attempt at a solution I want the list of atleast 30 projects in which si & ge , i also wants to know for which purpose si & ge use in those projects..i searched a lot in books and internet but didn't find the answer anywhere. Can anyone please guide me where i can find such projects. Here is my efforts, (1) Rectifiers in dc power supplies (2) Zener diodes in voltage regulators (3) Tunnel diodes as a relaxation oscillator at microwave frequencies. (4) Light emitter diode in digital displays. (5) Clipping and clamping networks. (6) Varactor diode in tuning sections of radio and TV receivers. can i consider these as projects ? and is there Si and GE diode presents in them ?