Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switch (DO) / Analog (AO) |
| Detection Component | High Sensitivity Photodiode |
| Adjustable Threshold | Yes, via Potentiometer |
| Indicator LED | Power and Signal Status |
| Pin Configuration | 3-Pin or 4-Pin Options |
| Response Time | < 1ms |
| PCB Dimensions | 32mm x 14mm x 5mm |
| Mounting Hole Size | 3.0mm Diameter |
| Application Range | Light Control, Robotics, Automation |
Anonymous
Mar 27, 2026
Rating: 5/5
Perfect for Arduino Projects
This module works flawlessly with my Arduino Uno. The sensitivity adjustment is very smooth, allowing me to set the exact light level needed to trigger the switch. Great value for the price.
Anonymous
Mar 25, 2026
Rating: 5/5
Bulk buy success
Purchased a lot for our community workshop. Every single module worked out of the box. The dual output (analog and digital) makes it versatile for different skill levels.
Anonymous
Mar 16, 2026
Rating: 5/5
Exactly as described
Fast shipping and the product matches the description perfectly. The analog output gives a nice range of values for more complex logic, not just simple on/off switching.
Anonymous
Mar 14, 2026
Rating: 4/5
Good sensitivity, clear instructions
The photodiode reacts quickly to changes in light. I used it for a night light project. Only giving 4 stars because the soldering pads are a bit small for beginners, but otherwise excellent.
Anonymous
Mar 10, 2026
Rating: 5/5
Reliable and Compact
I bought five of these for a line-following robot variation that detects light zones. All units performed consistently. The compact size makes it easy to fit into tight chassis designs.
Anonymous
Mar 02, 2026
Rating: 4/5
Great for learning sensors
Used this in my university embedded systems lab. It's robust enough to handle student errors and provides clear readings. The potentiometer is a bit stiff initially but loosens up with use.
Q: Can this module be directly connected to a 5V Raspberry Pi GPIO?
A: Yes, the module operates on 3.3V to 5V. However, ensure you connect the DO pin to a GPIO pin configured for input. If using the analog output (AO), note that Raspberry Pi requires an external ADC since it lacks native analog inputs.
Q: What is the maximum distance this sensor can detect a light source?
A: The detection range depends heavily on the intensity of the light source and ambient conditions. For a standard LED indicator at room lighting, it typically detects within 5-15cm. It is designed for proximity light detection rather than long-range.
Q: Does this come with header pins pre-soldered?
A: No, the module is shipped without header pins soldered to provide flexibility for direct wire soldering or using your own headers. You will need to solder them yourself.
Q: Is the output active high or active low?
A: The digital output (DO) is typically active low, meaning it outputs LOW (0V) when light is detected and HIGH (VCC) when dark, though this can sometimes depend on specific circuit variations. We recommend testing with a multimeter upon arrival.
Q: How do I adjust the sensitivity threshold?
A: There is a blue potentiometer on the back of the PCB. Rotate it clockwise to increase sensitivity (trigger in dimmer light) or counter-clockwise to decrease it. Use a small screwdriver while monitoring the signal LED.
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