How To Make the Electromagnetic Buzzer More Durable
An electromagnetic buzzer consists of an oscillator, electromagnetic coil, magnet, vibrating diaphragm, and shell. After the power is turned on, the audio signal current generated by the oscillator passes through the electromagnetic coil, which generates a magnetic field, and the vibrating diaphragm vibrates periodically under the interaction of the electromagnetic coil and the magnet.
The electromagnetic buzzer is widely used in computers, printers, copiers, alarms, electronic toys, automotive electronics, telephones, timers, and other electronic products as a sound generator.
The electromagnetic buzzer can produce a sound pressure of 85dB or more with 1.5V, but the current consumption is much higher than that of the piezoelectric buzzer, and the response frequency can be made lower with the same size of the electromagnetic buzzer. Mechanical buzzers are a small category of electromagnetic buzzers.
Today we will talk about how to make electromagnetic buzzers more durable.
Corrosion
Do not touch the components with bare hands when using the buzzer to avoid corrosion of the electrodes.
Surge Voltage Damage
Take care to protect the working circuit from surge voltage damage caused by stress action, drops, vibrations, and temperature changes.
Charge Migration
If a DC voltage is applied to the component, charge migration may occur. Please be careful not to use the device under DC voltage for a long time.
Specific Frequency Characteristics
Piezoelectric sounders are driven by an input frequency signal, and specific frequency characteristics can be obtained using both double-sided and sinusoidal wave drives. The frequency characteristics of piezoelectric sounders are altered or toned down when driven by signals with different waves. For example, forward square waves as well as other waveforms. If only positive square waves are available, a resistor or inductor can be connected in parallel to the two ends of the piezo.
In conclusion, using the buzzer in accordance with the above precautions can greatly increase the electrical life of the buzzer.
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