Bluetooth Audio Receiver and Playback Module (Bluetooth 4.0)

Technical parameters:
1. Power supply: DC 12V-24V 
2. Output Power: 35W (8 ohm load 22V power supply) 18W (4Ω load 12V supply) 
3. Efficiency:> = 93% 
4. Standby current: 150uA 
5 Static Current: 50mA 
6. SNR: 89dB

Board Operating voltage: DC 3.3V-6V
Interface pad spacing 2.54MM
size:15mm * 10mm

Overview:
Principle: KA-MT15 handsfree intercom module UTC34018 voice speakerphone ASIC production. Its working principle is based on the signal strength of the transmit and receive channels, automatically switches to send or receive job status, half-duplex mode.
Role: in hands-free intercom circuit can effectively suppress feedback caused by the sound of howling, enhance dialogue volume.

Power supply: DC 3V-5V 
Audio output amplitude: 950MV ± 50MV 47KΩ 
EN Foot: The Bluetooth connection, output high (+3.3 V) 
Back to even function: automatic back even
 

XFS5152CE is iFLYTEK introduced a new highly integrated speech synthesis chip, enabling Chinese and English speech synthesis; and integrates voice encoding and decoding functions, enables users to record and playback; In addition, further innovative It integrates lightweight voice recognition, support identification 30 command of the word, and supports the user's command word customization requirements.

Description:
1 module S8050 driver transistor
2 Operating Voltage 3.3V-5V
3 has a fixed bolt hole for easy installation
4 small plates PCB size: 3.2cm * 1.3cm
5 I / O port when the input high, the buzzer sounds

Introduction:
Sing for the moment! The DFPlayer Mini is a small and low cost MP3 module with an simplified output directly to the speaker. The module can be used as a stand alone module with attached battery, speaker and push buttons or used in combination with an Arduino UNO or any other with RX/TX capabilities.

Description :
WTW - 16P/28P adopts WT588D voice chip as control core. Only the peripheral gets power connection, the speaker, and the control terminals can work.

N9200 is a provider of serial MP3 chip, the perfect integration of MP3 , WMV hardware decoding. While software support TF card driver to support computer directly update spi flash content, support FAT16 , FAT32 file system. Can be accomplished by a simple serial UART serial command line instructions or play the specified music, as well as how to play music and other functions, without the cumbersome underlying operating, beautiful sound, easy to use, stable and reliable is the most important feature of this product. In addition, this chip is the depth of customized products, designed for fixed voice playing field to develop low-cost solutions.

1.Brief introduction

N9200 voice recording module is an offer of serial MP3 perfectly integrates hardware decoding of MP3, WMV.

product description
NV020 SD module is a rewritable audio content of high-capacity storage type voice module, can plug a maximum capacity of 1GB SD card memory. You can load WAV format voice and voice AD4 format.

Bluetooth 4.0 receiving amplifier board
Bluetooth chip: CSR8635
Digital Amplifier chip: PAM8403, op amp: NE5532

USB to 3D Audio USB Sound Card Adapter 7.1 Channel Professional Headset Microphone 3.5mm Jack For Win  /  Android / Linux / Mac

Features:
- Model: XH-M190
- Chip type: TPA3116
- Input voltage: DC12-24V
- Output power: 2*100W

ماژول تشخیص گفتار دارای چیپ LD3320 است این چیپ ترکیبی از یک پردازنده تشخیص گفتار به همراه چندین مدار خارجی است که از مبدلAD ، DA ، رابط میکروفون و خروجی صدا تشکیل شده است.

100Hz ~ 80kHz Analog Microphone MEMS (Silicon) 1.5V ~ 3.6V Omnidirectional (-38dB ±3dB @ 94dB SPL) Solder Pads

توضيحات:ADMP401 يك ميكروفن با كيفيت بالا، قيمت پايين، با خروجي آنالوگ و دريافت همه جهته ميباشد. اين ميكروفن بر پايه تكنولوژي MEMS ساخته شده و از محصولات شركت Analog Devices ميباشد. پاسخ فركانسي گسترده و مصرف پايين، اين قطعه را براي استفاده در بسياري از كاربرها، مناسب ميسازد.

There are a lot of people the concept of active and passive buzzer buzzer not very clear, here to do a brief introduction, we want to be helpful for future use.
Note that the "source" does not mean power. But to shock source.

ابعاد: 30 × MM 70

This MP3 shield board is designed based on VS1053B from VLSI. using this shiled you can plug in your arduino UNO/MEGA direcly as showing in pic, dont' need need to hook up with jumpers, it's becomes more easy to play music compared with the tiny mp3 breakout board. VS1053 is a versatile MP3 codec processor that is capable of decoding a variety of music formats,including Ogg Vorbis/MP3/AAC/WMA/MIDI audio. For the best headphone listening experience, the VS1053 includes EarSpeaker spatial processing which accurately simulates how a room with stereo loudspeakers would sound. In addition to being able to decode all major formats, VS1053 is capable of recording in Ogg Vobis file.