파이어비틀용 카메라 및 오디오 미디어 애드온 보드 -OV7725
(FireBeetle Covers-Camera&Audio Media Board)
개요
- 본 제품은 IoT 어플리케이션을 위한 파이어비틀용 카메라 및 오디오 애드온 보드입니다.
- 파이어비틀보드와 결합하여 MP3 플레이어, 레코더, 카메라로 변신할 수 있습니다.
- NAU8822 CODEC IIS, OV7725 카메라와 연결할 수 있는 인터페이스와 SD 카드(SDIO), 이어폰, 마이크로폰을 지원합니다.
- 미니 MIC 입력을 지원하고 NAU8822 CODEC IIS 는 12@8Ω BTL loudspeaker 맟 40mW@16Ω earphone 을 동작시킬 수 있습니다.
- NAU8822는 DAC 및 프로그래밍가능 마이크로폰 앰프를 지원합니다.
- 음성을 MIC나 마이크로폰에 입력하여 녹음이 가능하고 SD카드에 저장할 수 있습니다.
- OV7725 카메라를 연결하여 사진을 찍을 수 있습니다.
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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.
특징
- 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 - NOTE:
- This media board only supports FireBeetle ESP32 main board at present, for other main boards do not equipped with IIS interface.
- The flat ribbon cable of camera is relatively easy-to-break, please be careful and light in connection. The camera shot must be opposite to the SD card slot.
- It does not support video shooting and transmission.
SHIPPING LIST
- FireBeetle Covers-Camera&Audio Media Board(V1.0) x1
- OV7725 Camera x1
- 18pin-2.54mm Male Pin Header ×2
- 18pin-2.54mm Female Pin Header ×2