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Location: ShenZhen
Ships to: US,
Item: 404856976744
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:60 Days
Refund will be given as:Money Back
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Unbranded:Unbranded
MPN:Does Not Apply
Country/Region of Manufacture:China
Descriptions: This product MH-M18/M28/M38 for low-power Bluetooth design scheme, support the latest Bluetooth 4.2 transmission, dual-channel stereo lossless playback, the module is connected to the Bluetooth, you can quickly achieve Bluetooth wireless transmission, very convenient. Under the open environment, the Bluetooth connection distance can reach 20 metres. Widely used in a variety of Bluetooth audio reception, a variety of audio DIY modification, etc. Function Description:Bluetooth V4.2 version, support Bluetooth automatic back to connect technology, support WAV/WMA/FLAC/APE/MP3 lossless decoding.Stereo dual-channel output.After the module is powered on, the mobile phone searches for the Bluetooth name MH-M18/MH-M28/MH-M38, and you can play music after connecting to the Bluetooth.Module blue indicator light.When Bluetooth is not connected, the indicator light is flashing fast; When Bluetooth is connected, the indicator light is always on; When Bluetooth is playing, the indicator light is flashing slowly. MH-M18The module interface adopts half-hole process, customers can directly patch or solder on the board.MUTE mute control terminal: used to control the amplifier board, mute MUTE output high level 3.3V, playback output low level.KEY key control: this function needs to be connected to another resistor and key to achieve. (The corresponding resistor is shown in the wiring diagram.) Volume hold function: default output 100% volume. If the volume is less than 15%, the volume output will be 15% after re-power on; if the volume is more than 15%, the volume will remain unchanged after re-power on.If the control volume is greater than 15%, the original volume will remain unchanged after re-powering up. MH-M381. Power supply: you can directly use the MICRO USB Android cable 5V direct power supply, you can also access another 5V power supply or 3.7V lithium battery (as shown in the figure below). Note that 5V and 3.7V power supply interface is not the same, 5V connected to 5V and GND, 3.7V lithium battery connected to VBAT and GND. MAX operating current 5V2A, it is recommended to use 5V2A regulated power supply power supply, better sound quality.2. Support USB sound card, driver-free (plug and play). USB cable will be connected to the module and the computer, the computer can play music through the module amplifier output3. Audio output: output left and right channel stereo audio signals, can be connected to two 2-8 ohm, 3-5W speakers, 4 ohm 5W speakers for push memory.4. This product has its own dual 5W amplifier circuit, do not connect another amplifier to use! The output of the two amplifiers can not be connected in parallel or the negative pole connected together, or damage to the amplifier chip. MH-M381. Power supply: you can directly use the MICRO USB Android cable 5V direct power supply to use, you can also additionally access the 5V power supply or 3.7V lithium battery (as shown in the figure below). Note that 5V and 3.7V power supply interface is not the same, 5V connected to 5V and GND, 3.7V lithium battery connected to VBAT and GND. Maximum operating current 5V2A, it is recommended to use 5V2A regulated power supply power supply, better sound quality.2. Support USB sound card, driver-free (plug and play). USB cable will be connected to the module and the computer, the computer can play music through the module amplifier output3. Audio output: output left and right channel stereo audio signals, can be connected to two 2-8 ohm, 3-5W speakers, 4 ohm 5W speakers for push memory.4. This product has its own dual 5W amplifier circuit, do not connect another amplifier to use! The output of the two amplifiers can not be connected in parallel or the negative pole connected together, or damage to the amplifier chip. Precautions:Signal interference: Bluetooth antenna is extremely susceptible to high-frequency or strong electromagnetic signal interference, try to be placed away from sending wireless and other equipment. And the board can not be close to metal objects, keep a certain distance.If you connect the amplifier board current sound, caused by ground interference caused by the cause, it is recommended that the output of the Bluetooth module do not use the plug line, the need to weld the line, especially the ground line to be welded, and the line can not be too long, the shorter the better, try to be thicker. Audio ground in the amplifier board grounding issues, must be connected to the ground in the audio input of the amplifier, the ground can try to weld in different locations to achieve a low current sound. It is recommended that the Bluetooth and amplifier boards are powered separately to isolate the Bluetooth ground and amplifier ground.As this product is designed as a bare board, try not to touch the components on the board with your hands, it is easy to cause static electricity killed the chip resulting in burning. Warning: This product charging interface for current-limited charging mode, without charge management! For the safety of your life and property, please be sure to use the regular manufacturers of lithium batteries with protection plate, if the loss caused by improper use, the company does not assume any responsibility! Another: for the MH-M18 need to pay attention to the following two points when using.Power supply: default 5V power supply. If you need to use 3.7V lithium battery power supply, you need to replace the diode (as shown in the figure) with 0603 0 ohm resistor, or directly short-circuit both ends of the pad can be. Shipments default 5V power supply, such as customers need 3.7V lithium battery power supply can be customised in bulk. Bluetooth audio module on the power supply requirements are very high will affect the quality of the audio, it is recommended to join the LC filter circuit, especially switching power supply (such as mobile phone chargers, etc.). MUTE mute port.This module is muted when the port output high level 3.3V, playback output low level 0V. amplifier board mute high level is valid if you can directly access. If the mute level of the amplifier board is low level control, you need to add the reverse circuit, as shown in the figure. Package include: According to your choice. Payment: PayPal, PayPal Credit, MasterCard, Apple Pay, Google Pay…are all supported. Shipping: Please make sure your address 100% right. Return Policy: If you are not satisfied with the item,any problem,please contact with us before you give a negative feedback,because it doesn’t help you at all.we will try our best to help you solve the problems. Feedback: Your satisfaction is very important for us.If you are satisfied with our item or service,please give us a positive feedback and 5-Star DSRs rating. Contact Us: We are very glad to help you,please feel free to contact us whatever any problems.Due to high volume of daily incoming emails and time zone difference,please allow 24 hours for us to reply. About Item: For the funcitonal products in our shop,we make sure that the functions are the same as description,but the actual color and shape may looks a little different from pictures because of the technical improvement and manufacturing variance.Please be advised before you bid.
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