Description:
The piezoelectric buzzer is mainly composed of a multivibrator, a piezoelectric buzzer, an impedance matching device, a resonance box, an outer casing and the like. Some piezoelectric buzzer housings are also equipped with light-emitting diodes. A multivibrator is composed of a transistor or an integrated circuit.
When the power is turned on (1.5~15V DC working voltage), the multivibrator starts to oscillate and outputs an audio signal of 1.5~2.5kHZ
Piezoelectric buzzers can be divided into: passive piezoelectric buzzer (external drive series), active piezoelectric buzzer (including drive series), and self-excited piezoelectric buzzer.
The characteristics of the piezoelectric buzzer are: small size, light weight, thin thickness, low power consumption, good reliability, and low cost.
It is suitable for sounding devices on small electronic products such as electronic watches, pocket calculators, electronic doorbells and electronic toys. Electronic clocks, electrical products, burglar alarms, downhole alarms, smoke alarms and the use of electronic toys. It can also be used as an acoustic sensor for voice-activated toys.
Classification of buzzer :
1. According to the principle of its driving mode, it can be divided into: active buzzer (including driving circuit, also called self-excited buzzer) and passive buzzer (external drive, also called other excited buzzer) Sounder);
2. According to the different construction methods, it can be divided into: electromagnetic buzzer and piezoelectric buzzer;
3. According to the different packages, it can be divided into: DIP BUZZER (Pin Buzzer) and SMD BUZZER (SMD Buzzer);
4. According to the difference of current, it can be divided into: DC buzzer and AC buzzer. Among them, DC is the most common piezoelectric buzzer, which uses piezoelectric material, that is, when the external force causes the piezoelectric material to occur Piezoelectric materials generate electrical charges during deformation. Similarly, piezoelectric materials deform when energized.
The electromagnetic buzzer mainly uses the characteristics of the conductive conductor to generate a magnetic field, and uses a fixed permanent magnet and the conductive conductor to generate magnetic force to push the tympanic membrane fixed on the coil.
Due to the different sounding principles of the two buzzers, the piezoelectric structure is simple and durable but has a single tone and color difference. It is suitable for devices such as alarms. The electromagnetic type is mostly used for voice, music and other equipment because of its good timbre.
1.Car security Alarm Buzzer specfication:
| Type |
Unit |
HYD-2312 |
| Rated Voltage |
V |
3-24 |
| Operating Voltage |
V |
3-28 |
| *Rated Current(MAX) |
mA |
10, 12 |
| *Min Sound Output at 10 cm |
dB |
85-90 |
| *Resonant Frequency |
Hz |
3400±500 |
| Operating Temperature |
℃ |
-20~+60 |
| Storage Temperature |
℃ |
-30~+80 |
| Housing Material |
|
ABS |
| Weight |
g |
14 |
Packing&Shipping
Packaging Details 1000pcs per bubble chamber, 50set bubble chamber in one export carton. The carton dimension is 50*42*27
Port: shanghai
Lead Time : according to your order quantity
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