Bluetooth audio receiver module MH-M38 wireless DIY lossless car speaker
Module
Bluetooth Audio Receiver Module
MH-M38
Reference price
| 1: | $6.50 |
| 25: | $6.40 |
| 100: | $6.30 |
| 500: | $6.30 |
| 1000: | $6.20 |
| 5000: | $5.89 |
Product Information
Bluetooth audio receiver module MH-M38 wireless DIY lossless car speaker
Model Number：M2021030:M38
This product mh-m18 / M28 / 38 is a low-power Bluetooth design scheme. It supports the latest Bluetooth 4.2 transmission and Bluetooth automatic back connection technology. Dual channel stereo playback is not damaged. After the module is connected to Bluetooth, Bluetooth wireless transmission can be realized quickly, which is very convenient. In an open environment, the Bluetooth connection distance can reach 20m. It is widely used in various Bluetooth audio reception, various audio DIY modification, etc. Function Description: after the module is powered on, the mobile phone searches for the Bluetooth name mh-m18 / mh-m28 / mh-m38. After connecting Bluetooth, you can play music. Module blue indicator: when Bluetooth is not connected, the indicator flashes quickly; When Bluetooth is connected, the indicator is always on; When Bluetooth is playing, the indicator flashes slowly.
Parameter
Power supply: √, built-in power amplifier: √ (5W + 5W), lithium battery power supply: √, support USB sound card drive free: √, Bluetooth version: Bluetooth v4.2, support Bluetooth protocols: hfpv1.7, a2dpv1.2, avrcpv1.5, avctpv1.2, avdtpv1.2, format support: support wav / wma / FLAC / APE / mp3 lossless decoding, stereo dual channel output, working voltage: 5v3.7v-4.2v, Unconnected broadcast status: 5.5ma, connected working status: 20mA, deep sleep 3ua, transmission distance: 20m, working temperature – 40 ℃ – + 85 ℃, sensitivity: – 87dbm
Pin
1: 5V (power supply positive 5V), 2: GND (power supply negative), 3: Vbat (lithium battery positive 3.7-4.2v), 4: L + / L – (left channel output, directly connected to the horn), 5: R + / R – (right channel output, directly connected to the horn)
Power Supply
It can be directly powered by micro USB Android cable 5V, or connected to 5V power supply or 3.7V lithium battery. Note that the power supply interfaces of 5V and 3.7V are different. 5V is connected to 5V and GND, and 3.7 lithium battery is connected to Vbat and GND. The maximum working current is 5v2a. It is recommended to use 5v2a regulated power supply for better sound quality.
Drive Free
Support USB sound card, drive free (plug and play). Connect the module to the computer with USB data cable, and the computer can play music through the power amplifier output of the module.
Audio Output
Output stereo audio signals of left and right channels, which can be connected to two 2-8 Ω and 3-5w speakers respectively. 4 Ω 5W speakers are recommended.
Tip
This product has its own dual 5W power amplifier circuit. It must not be connected to another power amplifier! The outputs of the two power amplifiers shall not be connected in parallel or the negative electrodes shall be connected together, otherwise the power amplifier chip will be damaged.
