Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	2.7V to 5.5V
Output Type	Analog Voltage
Spectral Response	Visible Light (400nm - 700nm)
Package Type	SOIC-8 Surface Mount
Responsivity	0.45 A/W at 650nm
Dark Current	1 nA (Typical)
Response Time	10 µs
Operating Temperature	-40°C to +85°C
Integrated Component	Photodiode and Transimpedance Amplifier
Application	Ambient Light Sensing, Display Brightness Control

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Reliable and Consistent

I bought five of these for a solar tracking prototype. All units performed identically right out of the box. The linearity across different light intensities is impressive.

Anonymous

Mar 29, 2026

Rating: 5/5

Perfect for Arduino Projects

This module is incredibly easy to interface with my Arduino Uno. The analog output is stable and responds quickly to changes in room lighting. Great for building an automatic night light.

Anonymous

Mar 23, 2026

Rating: 4/5

Good for indoor sensing

Works perfectly for indoor ambient light measurement. Note that it saturates in direct sunlight, so keep that in mind if your project involves outdoor use without shielding.

Anonymous

Mar 23, 2026

Rating: 5/5

Great value for money

Compared to buying a discrete photodiode and op-amp separately, this integrated solution is much cheaper and less prone to noise issues. Highly recommended for students.

Anonymous

Mar 10, 2026

Rating: 4/5

Solid performance, small footprint

The integrated amplifier saves a lot of board space. Signal quality is excellent without needing external filtering. Only wish the datasheet had more example circuits for 3.3V systems.

Anonymous

Mar 01, 2026

Rating: 5/5

Plug and play simplicity

No complex calibration needed. Connected VCC, GND, and OUT, and immediately got readable values. The response time is fast enough for real-time applications.

5 FAQ

Q: Is there a digital output version available?

A: This specific model provides an analog voltage output proportional to light intensity. For digital output, you would need to connect this to an ADC or use a comparator circuit.

Q: How do I mount this on a breadboard?

A: Since this is an SOIC-8 surface mount package, you will need an SOIC-to-DIP adapter breakout board to easily plug it into a standard solderless breadboard.

Q: Does this module detect UV or IR light?

A: The OPT101 is primarily optimized for the visible light spectrum. While it may have minor sensitivity to near-IR, it is not designed for dedicated UV or IR detection applications.

Q: Can this sensor be directly connected to a 5V microcontroller?

A: Yes, the OPT101 operates comfortably within the 2.7V to 5.5V range, making it fully compatible with 5V logic microcontrollers like the Arduino Uno.

Q: What is the maximum current consumption of this module?

A: Under typical operating conditions at 5V, the quiescent current is approximately 0.6 mA, making it suitable for battery-powered projects.

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