STM32-BH1750+OLED

上传者: Dustinthewine | 上传时间: 2023-04-08 10:34:04 | 文件大小: 5.06MB | 文件类型: ZIP
BH1750FVI 是一种用于两线式串行总线接口的数字型光强度传感器集成电路。这种集成电路可以根据收集的光线强度数据来调整液晶或者键盘背景灯的亮度。利用它的高分辨率可以探测较大范围的光强度变化。 工作原理: BH1750的内部由光敏二极管、运算放大器、ADC采集、晶振等组成。PD二极管通过光生伏特效应将输入光信号转换成电信号,经运算放大电路放大后,由ADC采集电压,然后通过逻辑电路转换成16位二进制数存储在内部的寄存器中(光照越强,光电流越大,电压就越大)。 产品特点:支持I2CBUS接口接近视觉灵敏度的光谱灵敏度特性输出对应亮度的数字值对应广泛的输入光范围。(相当于1-65535lx)通过降低功率功能,实现低电流化。通过50Hz/60Hz除光噪音功能实现稳定的测定。支持1.8v逻辑输入接口。无需其他外部件。光源依赖性弱。有两种可选的I2Cslave地址。可调的测量结果影响较大的因素为光入口大小。使用这种功能计算1.1lx到100000lx马克斯/分钟的范围。最小误差变动在±20%。受红外线影响很小。

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