HW-771 is a very small Bluetooth module that adds special features to electronic devices according to its dimensions. The Bluetooth module is one of the most popular modules among electronic designers because of the simplisity in connecting to other devices. This Bluetooth module has both SD and USB ports. This module with its small dimensions can be installed on any device and can run easily. Of course, in the installation of the product, you should consider enough space that easily can access the outputs and module buttons. If you use old home audio systems and have trouble with old music players, you can use the Bluetooth module of the SD-USB-MP3 to equip your home audio system to Bluetooth technology. By doing so, you do not need much cost to buy a new audio system.
The SD-USB-MP3 HW-771 module can be connected with the AUX cable to old audio systems. For this reason, your audio system should be equipped with AUX port. If your audio system uses the old AV connections (paired pairs or three colors), you must first make an AV conversion to AUX. The inputs and outputs of the module in the SD-USB-MP3 module are used from the USB Type-A port to connect flash memory. Also, in this module, you can connect the memory card with micro size. Connecting this module helps home audio systems to use these up-to-date ports to play music. Also, a 3 watts amplifier in the device output will increase the power of the sound.
The HW-771 module has provided one of the simplest ways to connect the power supply. You do not need any specific adapter and just need to use the Micro USB port and a simple cable. Such a feature helps you to install the module simpler without soldering. Please note that the input power should not be more than 5 volts.
Bluetooth module can access the Bluetooth version 4.1. For this reason, the connection to the module is done at the lowest possible time and there will be no problem connecting to different devices. Note that flash memory and memory card connected to the module should be in FAT-32 or FAT-16 format. Otherwise, the module will not have the ability to play music.
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