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Measure Light and Optical Changes with a Compact Sensor
The Light Analog Log-Scale Sensor GA1A12S202 is a light sensor with analog output designed for light logging, auto-brightness control, and optical sensing. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Interface: Analog.
Why you’ll love it
- Onboard 68K load resistor: Onboard 68K load resistor for max 3V analog output
- Easy wiring: Analog
- Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
- Common controller support: Works well with Arduino, ESP32, Raspberry Pi, and similar boards
- Project-ready sensing: light logging, optical switching, line tracking, and brightness-aware projects
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Light Analog Log-Scale Sensor GA1A12S202 | light sensor with analog output | Current item |
| Adafruit TSL2591 High Dynamic Range Digital Light Sensor - STEMMA QT | light sensor with I2C | STEMMA QT connector, digital output |
| Light Sensor Digital BH1750FVI | light sensor with I2C | I2C interface, digital output |
| Adafruit LTR390 UV Light Sensor - STEMMA QT / Qwiic | light sensor with I2C | STEMMA QT connector, Qwiic connector |
What you can build
This sensor is a good fit for light meters, line followers, UV monitors, auto-brightness systems, and optical experiments.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard and jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include an Arduino or ADC-capable board, jumper wires, and a stable power source, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Light Analog Log-Scale Sensor GA1A12S202 |
|---|---|
| Interface | Analog |
| Category | optical light imaging photon sensors |
Wiring & usage notes
Connect power and ground, then read the sensor output with an analog-capable input or external ADC. Stable power and a clean ground help reduce noise.
What’s in the box
1 × Light Analog Log-Scale Sensor GA1A12S202
Frequently Asked Questions
What does the Light Analog Log-Scale Sensor GA1A12S202 measure?
It is designed to measure light, color, or optical changes.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this Analog sensor?
This sensor gives an analog-style signal, so you read it with an ADC or an analog-capable input.
What affects accuracy?
Power quality, wiring, mounting, target material, and the real environment can all affect the reading. It is best to test and calibrate in the final setup.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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