Because the car back up alarm is driven by DC voltage, there is no need to use AC signal to drive, just output the driving level of the driving port and amplify the driving current through the audion to make the car back up alarm sound. It is very simple, and the self-excited car back up alarm is not explained here. Here we only describe the other car back up alarm which must be driven by 1/2duty square wave signal.
There are two ways for MCU to drive other buzzer: one is PWM output direct drive, the other is to use I/O timing flipping level to generate driving waveform to drive buzzer. So some people must want to know what the car back up alarm has in the end, the price is also very expensive? Next, I will introduce you to the taxi buzzer:
1. The price of car back up alarm is relatively cheap;
2. The sound frequency can be controlled, which can make the effect of "Doramefa Solasi";
3. In some special cases, you can reuse a control port with LED;
4. In addition, the advantages of car back up alarm also include: convenient program control.
The above is the driving mode and advantages of the car back up alarm, if you have more questions about the buzzer, you can contact us at any time, we will timely solve the problem for you, in addition to our TV speaker, Bluetooth speaker, and Bluetooth speaker and other products.