20db/tétel 15mm-es Piezo Elements zümmögő hangjelző érzékelő kioldó dob lemez drót réz piezo hangjelzőkkel Arduino hangszóróhoz
20pcs/lot 15mm Piezo Elements buzzer Sounder Sensor Trigger Drum Disc With Wire Copper Piezo buzzers For Arduino Loudspeaker
Piezoelectric ceramic buzzer is a kind of device used in piezoelectric ceramics. The more common one is to use zirconium,
Titanium and piezoelectric ceramic chips (pzt) made by sintering lead oxides are most sensitive to 3khz audio signals, so the resonant frequency of the buzzer is usually designed to be around 3khz during production. In order to improve the low frequency response, a dual diaphragm structure is generally used.
working principle
When voltage is applied to piezoelectric ceramics, it will produce mechanical deformation with changes in voltage and frequency. On the other hand, when the piezoelectric ceramic is vibrated, an electric charge is generated. Using this principle, when an electrical signal is applied to a vibrator composed of two piezoelectric ceramics or a piezoelectric ceramic and a metal sheet, the so-called bimorph element, ultrasonic waves will be emitted due to bending vibration. On the contrary, when ultrasonic vibration is applied to the piezoelectric bimorph element, an electrical signal is generated. Based on the above effects, piezoelectric ceramics can be used as ultrasonic sensors.
Practical application
Piezoelectric ceramic sheet
Piezoelectric ceramic chip is an electronic sound element. Piezoelectric ceramic dielectric material is placed between two copper circular electrodes. When an AC audio signal is connected to the two electrodes, the piezoelectric chip will frequency according to the size of the signal. When vibration occurs, a corresponding sound is generated. Piezoelectric ceramic sheets are widely used in electronic appliances such as toys, pronunciation electronic watches, electronic instruments, electronic clocks, timers, etc. due to their simple structure.
Ultrasonic motors are made using related properties.
Features
High sensitivity and low energy consumption
Good reliability and stability
High and low temperature resistance, long life
Thin thickness and light weight
Small size, high pressure resistance
4000136372824 - eiechip
