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Tiny green PCB breakout board with silver sensor component and gold pins, 7.8mm by 10.6mm

Adafruit

Adafruit ALS-PT19 Analog Light Sensor Breakout 7.8mm x 10.6mm

SKU CH-J226-7N4GK

An analog light sensor breakout that outputs increasing voltage with brightness and replaces photocells in RoHS-compliant designs

  • TypePrototyping Products
  • RoHS-compliant upgrade for photocell projects
  • Spectral response matches human eye perception
  • Analog voltage output rises with light intensity
  • Operates from 2.5V to 5.5V supply
  • Compact 7.8mm x 10.6mm breakout board

Analog light sensor breakout

The Adafruit ALS-PT19 breakout board provides a compact analog light sensor for electronics prototyping. It suits makers and engineers who need a simple component to detect ambient brightness in a project. The board measures 7.8mm by 10.6mm and weighs 0.2g. Its spectral response closely matches human vision due to high infrared rejection.

Straightforward wiring and mounting

Connect the sensor to ground and supply 2.5V to 5.5V to the power pin, then read the analog voltage on the OUT pin. Voltage rises as detected light increases, giving a direct brightness indication. The tiny 2.4mm profile fits tight spaces, but the small pads demand careful soldering. No library or digital protocol is required, reducing software complexity.

Ideal for photocell replacements

This breakout suits anyone upgrading a photocell-based design that requires RoHS compliance. It works well for basic light-activated switches, data logging or display dimming. Builders who need calibrated lux output, digital I2C communication or spectral filtering beyond infrared rejection should look at alternative sensor modules.

Høydepunkter

  • RoHS-compliant upgrade for photocell projects
  • Spectral response matches human eye perception
  • Analog voltage output rises with light intensity
  • Operates from 2.5V to 5.5V supply
  • Compact 7.8mm x 10.6mm breakout board

Spesifikasjoner

TypePrototyping Products

Spørsmål om denne varen

How do I verify the ALS-PT19 is working after wiring it to power and ground?

Measure the analog voltage on the OUT pin with a multimeter or microcontroller ADC; the reading should rise when more light falls on the sensor and fall in darkness.

What comes in the box and what must I source separately?

The breakout board with the ALS PT19 sensor mounted is included; you must supply a 2.5V to 5.5V power source, ground connection, and a way to read the analog OUT pin.

Which version or capacity of this breakout should I choose?

Only one variant exists — a 7.8mm x 10.6mm x 2.4mm board weighing 0.2g with a single ALS PT19 sensor — so select this model for any analog light-sensing project.

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