FireBeetle Covers-Camera&Audio Media Board

SG$29.70

INTRODUCTION

DFRobot FireBeetle series are low power consumption development modules designed for Internet of Things (IoT). The FireBeetle Covers-Camera & Audio Media Board is a multimedia device for IoT that provides interfaces to connect NAU8822 CODEC IIS, OV7725 camera, SD card (SDIO), earphone and microphone.

Moreover, it equips with a mini MIC input interface. The NAU8822 CODEC IIS can drive both 12@8Ω BTL loudspeaker and 40mW@16Ω earphone. The direct connection is supported. Meanwhile, NAU8822 supports DAC sound signal acquisition and programmable microphone amplifier. The recording is available when input voices with onboard MIC interface or microphone then save it to SD card. What's more, the function to take photos is available when connected to an OV7725 CAMERA.

With any FireBeetle main boards (e.g. ESP32 main board), the FireBeetle Covers-Camera & Audio Media Board could be a MP3, a recorder, a camera. Once connected to the Internet, it could be an Internet radio, a cloud image recognition.

NOTE:

DOCUMENTS

Product wiki

SPECIFICATION

Operating Voltage: 3.7V~5.5V (VCC)

Output Voltage: 3.3V

User-defined Button: tested by IO16(DI)

RESET x1

SD Card:
            Bus Interface: SDIO Protocol
            Default Transmission Rate: 10MHz
            Max. Transmission Rate: 20MHz

Camera OV7725: (data as below is just for reference; some functions could not be realized by ESP32 now).
            Photosensitive/Light-sensitive Array: 640*480
            Optical Size: 1/6"
            Angle of View: 25°
            SCCB Standard Interface
            Output Pixel Format: Raw RGB，RGB(RGB4:2:2 ,RGB565/555/444)，YCbCr (4:2:2)
            Image Size: VGA,QVGA and CIF to 40x30
            VarioPixel Subsampling
            Auto Image Control: auto exposure control (AEC), auto gain control (AGC), auto white balance (AWB), auto band filter and auto black level (ABL) calibration.
            Image Quality Control: saturation, tone, gamma, clarity and anti-interference
            ISP: noise reduction and defect calibration
            Lens Shading Correction
            Auto Saturation Adjustment
            Frame Synchronization
            Fixed-focus

NAU8822:
            DAC:94dB SNR , -84db THD
            ADC:90dB SNR , -80dB THD
            Integrated BTL loudspeaker drive: 1W @ 8Ω
            Integrated earphone drive: 40mW @ 16Ω
            Integrated programmable microphone amplifier
            Typical Sampling Rate: 8KHz, 48KHz, 96KHz, 192KHz
            Standard Video Interface: PCM and I2S

MIC:
            Type: Electret Capacitor
            Output: analog
            Direction: omnidirectional
            Frequency Range: 100Hz~15KHz
            Sensitivity: -43dB ±5dB @ 94dB SPL
            Signal-to-noise Ratio: 58Db