Use a Comparator or Op-Amp to Simplify Light Dependent Resistor Output

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https://www.electronics-lab.com/use-comparator-op-amp-simplify-light-dependent-resistor-output/

If your project calls for light sensitivity, it’s hard to beat light dependent resistors (LDRs), also known as photoresistors. They’re available for a few cents each, and their resistance varies based on how much light they receive. In the dark, these devices produce resistances in the megohm range, and can fall to hundreds of ohms […]

ATtiny85 Light Sensor – I2C slave device

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https://www.electronics-lab.com/attiny85-light-sensor-i2c-slave-device/

Paweł Spychalski build a photoresistor based daylight meter sensor connected via I2C bus using ATtiny85: I love AVR ATtinyx5 series microcontrollers. They are cheap, easy to use, they can be programmed just like Arduinos and comparing to their size they offer great features. For example, they can be used as remote analog to digital converters […]