BH1750 Digital Lux Sensor
by Rohm / clone
SKU: PSA-CMP-BH1750
No reviews yetTypical India street price
₹60–₹140
True lux meter over I2C — better than LDR for science graphs.
Interface: I2C
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Concept
A digital light sensor that reports illuminance in lux, not a raw ADC count.
A little theory
Photodiode + ADC inside BH1750. I2C address 0x23 or 0x5C. Human-eye-ish spectral response for classroom lux labs. In the classroom, treat BH1750 Digital Lux Sensor as a beginner part using I2C. Typical India street price is about ₹60–₹140. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Wire VCC/GND/SCL/SDA. BH1750 library → readLightLevel() in lux.
Classroom & project use
- Daylight logging
- Street-light science
- Compare vs LDR
Buying in India
Precautions
- Keep windows clean
- Do not stare into high-power lamps at close range during calibration
Specifications
| Range | 1–65535 lx |
| Bus | I2C |
| Address | 0x23/0x5C |
| Category | Sensors |
| Difficulty | Beginner |
| Voltage | 3.3–5V module |
| Interface | I2C |
Pinout
VCC | GND | SCL | SDA | ADDR
