Buzzer Circuit Schematic. The arduino sketch below operates the above circuit by pulsing the buzzer on for a short period of time continuously. We like the door buzzer sound circuit in two tone sound.
Arbitrary wave shapes and a wide range of frequencies can be used for the excitation waveform. The switch in the schematic is used to amplify the excitation waveform and is typically either a bjt or a fet. It saves if you use a battery.
Arbitrary wave shapes and a wide range of frequencies can be used for the excitation waveform.
Application circuit for magnetic transducer. I feel that the mechanical bell type operation of the alarm could be easily replaced by one of the above circuits. By using just a 9 volt battery only. The only problem being that the voltage available is only 1 5v.
