M5Stack Light Sensor Unit

The Light Sensor Unit from M5Stack measures brightness with a photoresistor. The analog output follows the brightness. An LM393 comparator also provides a digital output whose switching threshold is set with the potentiometer.

For readings in lux, the M5Stack DLight Unit Ambient Light Sensor BH1750 is suitable.

Recommended Accessories:

• M5Stack M5GO IoT Starter Kit V2.7
• M5Stack Grove2Dupont Conversion Cable 20cm 10pcs

Features:

• Analog output and digital output
• LM393 comparator, threshold adjustable with the 10 kOhm potentiometer
• Connects to Port B. The Basic Core itself only has Port A, Ports B and C come with the M5GO base, for example in the M5GO IoT Starter Kit V2.7
• 2 mounting holes for snap pins or screws

Application Examples:

• Twilight switch
• Light-controlled lamp
• Detecting whether a light is on in a room

Documentation:

• M5Stack documentation Unit Light
• Arduino tutorial by M5Stack

Technical Data:

• Manufacturer: M5Stack
• Manufacturer SKU: U021
• Comparator: LM393
• Potentiometer: 10 kOhm
• Connection: Grove HY2.0-4P, Port B (GPIO)
• Pinout: black GND, red 5V, yellow digital output, white analog output
• On the M5Stack Basic: yellow G26, white G36
• Dimensions: 32 × 24 × 8 mm
• Weight: 16.5 g

Scope of Delivery:

• 1× M5Stack Light Sensor Unit
• 1× Grove cable 20 cm
• 1× storage box