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The VCNL4040 is a handy two-in-one sensor, with a proximity sensor that works from 0 to 200mm (about 7.5 inches) and light sensor with range of 0.0125 to 6553 lux.
When you need to measure a small distance with reasonable accuracy, the VCNL4040 Proximity Sensor from Vishay can do that for you. To give you some ability to tune your measurements for your situation, the VCNL4040 lets you adjust the integration time (how long light is being measured) to set the sensitivity of your measurements depending on the lighting conditions.
This sensor is easy to use with any microcontroller that has i2c capability. You can use it with 3.3V or 5V logic. A tutorial guide is available for all the details on how to use the VCNL4040 in both Arduino and CircuitPython.
More information can be found on the website of Adafruit.