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. It is equipped with a mini MIC input interface. The NAU8822 CODEC IIS can drive both 12@8Ω BTL loudspeaker and 40mW@16Ω earphone. Direct connection is supported. Meanwhile, NAU8822 supports DAC sound signal acquisition and a programmable microphone amplifier. Recording is available when input voices with onboard MIC interface or microphone are saved to the SD card. Photo capture is available when connected to an OV7725 camera. Function Diagram With any FireBeetle main boards (e.g. ESP32 main board), the FireBeetle Covers-Camera & Audio Media Board can function as an MP3 player, recorder, or camera. Once connected to the Internet, it can be used as an Internet radio or for cloud image recognition. NOTE: This media board only supports the FireBeetle ESP32 main board at present, as other boards do not have an IIS interface. The flat ribbon cable of the camera is relatively fragile—please connect carefully. The camera lens must face opposite the SD card slot. Video shooting and transmission are not supported. Specification Operating Voltage: 3.7V ~ 5.5V (VCC) Output Voltage: 3.3V User-defined Button: tested by IO16(DI) RESET ×1 SD Card: Bus Interface: SDIO Protocol Default Transmission Rate: 10MHz Max. Transmission Rate: 20MHz Camera OV7725: Photosensitive 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, CIF to 40 × 30 VarioPixel Subsampling Auto Image Control: AEC, AGC, AWB, auto band filter, ABL calibration Image Quality Control: saturation, tone, gamma, clarity, 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 Programmable microphone amplifier Typical Sampling Rate: 8KHz, 48KHz, 96KHz, 192KHz Standard Audio 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 Shipping List FireBeetle Covers-Camera & Audio Media Board (V1.0) ×1 OV7725 Camera ×1 18pin-2.54mm Male Pin Header ×2 18pin-2.54mm Female Pin Header ×2
Related
Related
Related
Related