Teach you how to convert a wired speaker into a Bluetooth speaker
Introduction to MH-M28
Among the MH-M28 modules introduced in this issue , only the M28 with a 3.5mm headphone jack is very convenient to use. It is also the reason why we chose to use the M28 for the wired small speakers this time .
After personal testing, use the M28 to connect to Bluetooth in normal times. In the environment, it can reach a distance of 15-20 meters (different depending on the use environment), but one thing to note is that 15-20 meters is the distance of the connection. When playing music, the power supply can reach about 10 meters without appearing. Caton, when the power supply is poor, the test can reach 5 ~ 6 meters, which is enough for a Bluetooth speaker distance. The
most important thing is that the cost of a M28 modification is acceptable to our ordinary users!
The low-power Bluetooth design scheme adopted in the module parameters and supports the newer Bluetooth 4.2 transmission, on-board audio output interface, two-channel stereo lossless playback, can be used on most devices with 3.5mm audio interface , We used it to modify our own small speakers this time!
Picture reference
From the front, the module has a micro USB power supply port that can be directly connected to the power supply by the data cable, and it also has a 5V and lithium battery power supply (VBAT) port. If you feel that the data cable power supply is inconvenient with a root cable, you can connect a rated 3.7V lithium battery Power supply, the Bluetooth module will consume power after the battery port is powered. Users who connect to the battery need to connect an external self-locking or toggle switch to control the power supply! The audio interface is simple and rude, just plug it directly into the 3.5mm hole!
There are no components on the back for easy attachment to the speaker!
Put a picture of my little speaker!
Wiring instructions
In fact, the wiring is very simple. One power supply is connected to the round audio interface on the speaker.
Figure 1 USB power supply
|
Figure 2 Battery powered
|
The speaker's power supply is powered by a lithium battery boosted by 5V. If the power of the booster module is tested, there is no problem. You can see the two batteries used for battery power supply. One battery can also be used here.
Phone connection
Enter the Bluetooth settings of the mobile phone, turn on the Bluetooth, and find the Bluetooth pairing connection named MH-M28
Figure 1 Bluetooth pairing
|
Figure 2 Successful connection
|
use
After connecting, we can use NetEase Cloud, Kugou, QQ to play music happily, and support Bluetooth connection between mobile phones and computers
It is worth noting that the module only supports playing music and games such as sounds and does not support phone playback!
to sum up
At this point, our bluetooth speaker is complete. If you are interested, you can modify the interface to the inside of the speaker. It will look more beautiful. If you have any questions, you can leave a message! ! !