Before revision: Types An electromagnetic buzzer thumbTypes Mounting Buzzer Magnetic Buzzers Piezo Buzzers PCB Mounting Buzzer Electromagnetic Buzzers Electromechanical Early devices were based on an electromechanical system identical to an electric bell without the metal gong.
After revision: Types Electromechanical Early devices were based on an electromechanical system identical to an electric bell without the metal gong.