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Adafruit Right Angle VEML7700 Lux Sensor is an ambient light sensor breakout built around Vishay's VEML7700. Unlike simpler light sensors that only report a relative brighter/darker value, this board calculates lux, the SI unit of illuminance, making readings easier to compare across projects and between multiple sensors.
This version uses a right-angle sensor, so it detects light travelling parallel to the PCB surface instead of straight down onto the board. That makes it especially useful when you want to sense light from the side of an enclosure, along a panel edge, or in installations where a forward-facing sensor is a better fit than a top-facing one.
The breakout handles the support circuitry for you, including a 3.3V regulator and logic level shifting, so it can be used with both 3.3V and 5V microcontrollers. With standard I2C, onboard pull-ups, and STEMMA QT / Qwiic-compatible connectors, it is easy to integrate with Arduino, CircuitPython, Raspberry Pi, and other Blinka-supported systems.
Technical details for the Adafruit Right Angle VEML7700 Lux Sensor.
| Brand | Adafruit |
|---|---|
| Sensor IC | Vishay VEML7700 |
| Interface | I2C |
| Input Voltage | 3V to 5V DC via VIN |
| Light Measurement Range | 0 lux to about 120 klux |
| Resolution | Down to 0.0036 lx/ct |
| Dynamic Range | 16-bit |
| Adjustments | Software-selectable gain and integration time |
| Connector | STEMMA QT / Qwiic-compatible JST SH |
| Logic Support | 3.3V and 5V logic compatible via onboard level shifting |
Pin configuration for the Adafruit Right Angle VEML7700 Lux Sensor breakout.
| Pin | Name | Function |
|---|---|---|
| 1 | VIN | Power input for the breakout. Accepts 3V to 5V DC and feeds the onboard regulator. |
| 2 | 3Vo | Regulated 3.3V output from the onboard regulator, available for light external loads. |
| 3 | GND | Common ground for power and logic. |
| 4 | SCL | I2C clock line. |
| 5 | SDA | I2C data line. |
Wire VIN, GND, SCL, and SDA to your microcontroller's matching power and I2C pins, or use the onboard STEMMA QT connectors for fast plug-and-play hookup. The board includes the required support circuitry and I2C pull-ups.
Please note: the QT cable is not included. This board is designed for easy use with either direct pin wiring or STEMMA QT / Qwiic-compatible cables.
For development, Adafruit provides libraries for Arduino and CircuitPython, and the sensor can also be used with Python on boards such as Raspberry Pi via Blinka.
This version senses light coming parallel to the PCB surface rather than straight onto the top of the board. That makes it useful where the sensor needs to look sideways instead of upward.
The breakout is designed to be powered from 3V to 5V on VIN. It includes an onboard 3.3V regulator and logic level shifting, so it can work with both 3.3V and 5V microcontrollers.
It uses the standard I2C interface with SDA and SCL pins. This STEMMA QT/Qwiic version also has JST-SH connectors for solderless I2C connection, and Adafruit notes it can be used with microcontrollers or Blinka-supported SBCs including Raspberry Pi.
According to the Adafruit product brief, it offers 16-bit ambient light detection from 0 lux to about 120 klux. It also supports fine resolution down to 0.0036 lx/ct.
Yes. The VEML7700 supports software-adjustable gain and integration time, which helps tune readings for different light levels.
No. The supplier brief specifically states that the QT cable is not included.
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