The invention discloses a reversing buzzer circuit which comprises a rectifier diode D1, a voltage stabilization filter circuit, an oscillation chip U1, an amplification circuit and a boosting transformer L1, the voltage stabilization filter circuit further comprises a resistor R3, a resistor R2, a triode Q1, a voltage stabilization diode DW1 and a capacitor C1, and the amplification circuit further comprises a resistor R1 and a square wave signal amplification tube Q3. When passing through the triode Q1 and the voltage stabilizing diode DW1, the voltage higher than 5.1 V is completely released to the GND electrode, the emitting electrode of the triode Q1 outputs 5.1 V voltage all the time, the power supply circuit can be suitable for a vehicle-mounted power supply with the voltage ranging from 6V to 36V, and the power supply voltage range is wide; by adding the function of blocking the leakage voltage of the branch circuit, the problem that the reversing buzzer makes a'squeak 'sound due to electric leakage is effectively solved, and the stability and simplicity of sound frequency can be realized by changing a program, so that the reversing buzzer is not easy to break down.
本发明公开了一种倒车蜂鸣器电路,包括有整流二极管D1、稳压滤波电路、震荡芯片U1、放大电路和升压变压器L1,稳压滤波电路进一步包括有电阻R3、电阻R2、三极管Q1、稳压二极管DW1和电容C1,放大电路进一步包括有电阻R1和方波信号放大管Q3。本发明在经过三极管Q1和稳压二极管DW1时,把高于5.1V的电压全部释放到GND极上,让三极管Q1发射极始终是5.1V电压输出,可适用于电压在6V‑36V的车辆车载电源,供电电压范围广;通过增加一个阻断支路漏电电压的功能,有效地解决了因漏电而使倒车蜂鸣器发出“吱吱”的声音问题,而且可以通过更改程序实现声音频率的稳定,简约切不容易出故障。
Back-up buzzer circuit
一种倒车蜂鸣器电路
2024-02-27
Patent
Electronic Resource
Chinese
IPC: | G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |
Buzzer output control device and buzzer output control method
European Patent Office | 2015
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