ArduinoGeneral

Speaker for DFPlayer

userHead AlexanderK 2016-08-11 14:17:20 3474 Views7 Replies
Hi.

I read this page, but I didn't find information about the speaker. The only reference:
Drive speaker less than 3W


What are the technical characteristics: Watts, Ohms, Hz need for speaker?
2016-08-12 16:39:04 :) userHeadPic Wendy.Hu
2016-08-12 16:16:51 Big thanks. userHeadPic AlexanderK
2016-08-12 15:51:10 hello

It will not be broken. Module's serial port is 3.3V TTL level, so the default interface level is 3.3V. If the MCU system is 5V. It is recommended connect a 1K resistor in series. More detailed info you can refer to the user manual- 4、Application Circuit,as shown in the attachment.
userHeadPic Wendy.Hu
2016-08-12 14:59:58 Thank yoo.

I see the link. But MP3 module connect to 5V. Use formula: W = I^2 * R and V = W / I, then V = sqrt(W) * sqrt(R) = sqrt(0.5) * sqrt(8) = 2 Volts. The speaker will not broken at 5 Volts?
userHeadPic AlexanderK
2016-08-12 14:47:33 Sorry, I am not very clear about the frequency of the horn. I checked it on the Internet and the voice frequency of the human ear can receive is 20-20000HZ, so the frequency of the horn in the range will be fine. And I know maybe the frequency of most horn in the range of FO-10000HZ will be suitable for our mp3 mini player, very good speaker is not very suitable for our mp3.

Hope it will help you.
userHeadPic Wendy.Hu
2016-08-11 17:21:17 Wendy.Hu, thanks for your reply. What frequency range would you recommend for a speaker? userHeadPic AlexanderK
2016-08-11 16:01:39 Hi,

Sorry for our incomplete info.

All general horn can be used, only need the Watts is less than 3W. Maybe you can refer to the following link:
https://www.alibaba.com/trade/search?fs ... +0.5W+8Ohm
userHeadPic Wendy.Hu