| Introduction of Magnetic Buzzer |
| 电磁式蜂鸣器简介 |
Specifications:
Rated Voltage: A magnetic buzzer is driven by 1/2 square waves (V o-p).
Operating Voltage: For normal operating. But it is not guaranteed to make the minimum SPL under the rated voltage.
Consumption Current: The current is stably consumed under the regular operation. However, it normally takes three times of current at the moment of starting to work.
Direct Current Resistance: The direct current resistance is measured by ammeter directly.
Sound Output: The sound output is measured by decibel meter. Applying rated voltage and 1/2 square waves, and the distance of 10 cm.
Rated Frequency: A buzzer can make sound on any frequencies, but we suggest that the highest and the most stable SPL comes from the rated frequency.
Operating Temp. : Keep working well between -30℃ and +70℃.Rated Voltage 电磁式蜂鸣器以1/2方波(V o-p)驱动
Operating Voltage 可正常工作的适用电压范围,但不保证低于额定电压时仍能达到最低音压
Consumption Current 正常发声后,持续的消耗电流量.而启动瞬间需要的电流,一般至少需要持续耗电流的三倍
Direct Current Resistance 以电表直接量测的直流阻抗
Sound Output 加以额定的电压,1/2方波,以Db表在距离10cm测得
Rated Frequency 蜂鸣器每一个频率都仍有声音,额定的频率指建议使用的最大,且音压一致性较好的频点
Operating Temp. 能维持正常动作的温度 –30–+70度
How to choose:
Driving methods: AX series with built drive circuit will be the best choice when we cannot provide frequency signal to a buzzer, it only needs direct current.
Dimension: Dimension affects frequency, small size result in high frequency.
Voltage: Depend on V o-p (1/2 square waves)
Fixed methods: From the highest cost to the lowest- DIP, wires/ connector, SMD.
Soldering methods: AS series is soldered by hand, the frequency is lower because of the holes on the bottom.On the other hand, we suggest AC series for the reflow soldering, the reliability is better.
驱动方式若无法提供频率信号给蜂鸣器工作,可考虑用AX系列(内含驱动线路),给予直流电压即可.
蜂鸣器尺寸大小 尺寸会影响频率,小尺寸频率会较高.
电压大小 以V 0-P计算 (1/2方波).
固定方式 DIP最便宜,焊线次之,SMD成本最高.
焊接方式 手焊可用AS系列,底部有气孔频率可较低,过钖炉建议使用AC系列,信赖度较好。
