HiLetgo BH1750 Digital Light Sensor Module for Arduino 2pcs 5V Compact

Description

Product Overview

The HiLetgo BH1750 digital light sensor is a highly accurate illumination measurement device designed for seamless integration with Arduino and other 5V microcontroller platforms. Housed in a compact PCB footprint, the sensor incorporates the BH1750FVI chip, which converts ambient light intensity into a digital signal via the I2C protocol. Internal level conversion circuitry enables direct connection to 5V logic without the need for external voltage translators, simplifying wiring and reducing component count. The module includes a standard XH2.54 header, allowing users to plug in pre‑cut jumper wires or custom cables for rapid prototyping.

Key specifications include a measurement range of 1 to 65535 lux, a resolution of 1 lux, and a response time of less than 120 ms. The sensor operates on a supply voltage of 3.3 V to 5 V, making it compatible with a wide variety of development boards, including Arduino Uno, Nano, Mega, and STM32‑based platforms. Its low power consumption (under 0.12 mA in continuous mode) ensures suitability for battery‑powered projects such as portable light meters, automated grow‑light systems, and energy‑saving lighting controls.

Usage

Designed for indoor environments, the BH1750 sensor excels in applications where precise light monitoring is essential. Hobbyists can employ the module to create automatic night‑light systems that turn LEDs on or off based on ambient brightness. In greenhouse or indoor farming setups, the sensor can feed real‑time lux data to a microcontroller that adjusts supplemental lighting to maintain optimal plant growth conditions. Educational projects benefit from the sensor’s straightforward I2C interface, allowing students to learn about digital communication, sensor calibration, and data logging without complex analog circuitry.

Because the module operates at 5 V and includes built‑in level shifting, it can be directly connected to the 5 V pins of most Arduino boards. The XH2.54 header simplifies solder‑free assembly: users simply insert male jumper wires into the header and route them to the Arduino’s SDA and SCL pins. The sensor’s small size (approximately 4.2 × 2.7 × 1.1 inches) makes it easy to embed within enclosures, robot chassis, or wearable devices where space is at a premium.

Why Choose Us

HiLetgo is a trusted brand in the maker community, known for delivering reliable electronic components at competitive prices. Each BH1750 sensor module undergoes rigorous quality testing to ensure consistent performance across the full measurement range. The product is backed by a responsive customer support team that provides firmware examples, wiring diagrams, and troubleshooting assistance. With a 4.4‑star rating from verified buyers, the module has demonstrated durability and accuracy in a variety of real‑world applications.

In addition to the core sensor, HiLetgo supplies comprehensive documentation, including a detailed datasheet, Arduino library references, and example code snippets that accelerate development time. The inclusion of the XH2.54 interface cable in the package eliminates the need for users to source additional connectors, further reducing project costs and assembly effort.

Key Features

• High‑precision lux measurement from 1 to 65,535 lux for accurate light monitoring
• Built‑in I2C level conversion enables direct 5 V microcontroller connection without extra components
• Compact PCB design with XH2.54 header for quick, solder‑free wiring and easy prototyping
• Low power consumption suitable for battery‑operated or energy‑saving applications
• Responsive after‑sales support and detailed documentation to help users succeed

FAQ

What microcontroller boards are compatible with the BH1750 sensor?

The sensor works with any 5 V or 3.3 V board that supports I2C, including Arduino Uno, Nano, Mega, ESP32, ESP8266, STM32, and Raspberry Pi (with appropriate level shifting).

How do I calibrate the sensor for my specific lighting environment?

Calibration can be performed by comparing the sensor’s lux reading with a reference lux meter under known lighting conditions, then applying a scaling factor in your code to adjust the output.

Can the sensor be used outdoors?

While the BH1750 is designed for indoor use, it can operate outdoors if protected from moisture and extreme temperatures. Enclose the module in a waterproof housing for reliable outdoor performance.

What is the difference between continuous and one‑time measurement modes?

Continuous mode provides ongoing lux updates at a set interval, ideal for real‑time monitoring. One‑time mode takes a single measurement and then powers down, conserving energy for intermittent sensing applications.

Is there a library available for Arduino?

Yes, the popular “BH1750” library on the Arduino IDE Library Manager supports this sensor and includes example sketches for both continuous and one‑time measurement modes.