Voice playback module

Introduction: Voice playback module supports SPIFLASH to be simulated as a U disk, directly updates the voice in SPIFLASH just like operating a U disk, and directly controls the playback of the voice in FLASH through the serial port
1. Product introduction

Voice playback module, this module uses JQ8400-FL Voice chip, supports MP3 WAV hardware decoding, supports sampling rate (KHz): 8/11.025/12/16/22.05/24/32/44.1/48, supports SPIFLASH simulation as a U disk, and updates SPIFLASH directly like operating a U disk Voice, directly control the playback of the voice in FLASH through the serial port


2. Application scenarios

The voice playback module is used in scenarios that require fixed voice playback, such as industrial equipment voice prompts, parking lot voice reminders, vehicle navigation voice broadcasts, highway transportation inspections, toll stations Voice prompts, railway station, bus station security check voice prompts, etc. The biggest advantage of this module is that the voice in FLASH can be updated or replaced at any time.


3. Product Overview

1. The power supply is 5V

2. The MICRO-USB interface is reserved, which can be directly connected to the PC to recognize it as a U disk, and you can copy the voice you want into it

. 3. The BUSY signal is reserved during voice playback for judgment. Whether the voice broadcast is over

4. Control the sequence of broadcast voice through the serial port

5. The volume of the voice playback can be set through the serial port command

6. This module is designed for a two-layer PCB board


4. Product parameters

Electrical parameters:

1. Input voltage: 5V

2. Among them, 3.3V The power supply uses the JQ8400-FL voice chip to self-output 3.3V

3. The audio power amplifier uses 8002A, which can drive a 4-ohm 3W speaker at most

. 4. The FLASH part needs to use a minimum capacity of 8Mbit or more, so that the PC can recognize the minimum U disk capacity of 1MByte, voice format is MP3

5. Control input and output signal 3.3V/5V

6. Two-layer board design

mechanical parameters:

PCB size: 30mm long, 20mm wide


5. Instructions and tutorials

1. Input 5V power supply.

2. Connect the MICRO-USB to put in the voice audio content

3. Use the pin header to connect the power supply and serial communication

4. Test the voice broadcast function of the module by issuing commands through the serial port to the USB module

5. Select a 4 ohm 3W speaker

6. Pay attention to the correct power input Negative pole


6. Remarks

1. The drive power supply is 5V, using serial port TTL signals. The internal RX and TX signals have been exchanged and directly connected to external communication without cross-connection

. 2. The FLASH model used in the schematic diagram is ZB25VQ40ATIG and needs to be replaced with the same series. At least 8Mbit, such as model: ZB25VQ80ATIG.

3. There is a BUSY signal reserved in the hardware part, which can be used to confirm whether the playback is completed when controlling playback

. 4. The attachment contains hardware schematic diagram, JQ8400-FL voice chip information, speech synthesis software, MP3 format converter and IBOM information, and the location of each component. Clear at a glance

5. This module is pure hardware, no code is required, but the host computer needs to input content

6. The component cost is 7.2 yuan


7. Test video

1. The video shows the voice import and command playback functions