and then converted into a 16-bit binary number through the logic circuit
and stored in the internal register (Note: The stronger the light, the greater
the photocurrent, and the greater the voltage, so the intensity of the light
can be judged by the value of the voltage. However, it should be noted
that the voltage and the light intensity are one-to-one correspondence,
but not proportional. That is why this chip linear processing is done and
why the integrated IC is used directly instead of photodiodes). BH1750
leads out the clock line and data line. The single-chip microcomputer can
communicate with the BH1750 module through the I2C protocol. You can
choose the working mode of the BH1750, or you can extract the
illuminance data of the BH1750 register.
(2)Parameters:
◆ I2C digital interface, supporting a maximum rate of 400Kbps
◆ The output is Illuminance
◆ Measuring range is 1~65535 lux, the minimum resolution is 1lux
◆ Low power consumption (Power down) function
◆ Shield the interference of light changes caused by 50/60Hz mains
frequency
◆ Supports two I2C addresses, selected by the ADDR pin
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