LM393 Photosensitive Sensor Module – DIY Light-Controlled Switch Kit

Build your own automatic light-sensing circuit with the LM393 Photosensitive Sensor Module. This compact DIY kit uses the widely popular LM393 comparator chip to detect ambient light levels and trigger an output switch automatically — perfect for electronics hobbyists, students, makers, and anyone exploring DIY automation projects.

Key Specifications

Chip: LM393 dual differential comparator
Maximum active load current: 400 mA
Maximum passive load power: 300 W
Board dimensions: 45 × 38 mm
Includes: Complete DIY kit with all components
Customizable: Yes — adjustable sensitivity via onboard potentiometer

Why You'll Love This Module

🔆 Light-Level Triggered Output — Automatically switches on or off based on detected light intensity, ideal for dusk-to-dawn automation, street light controllers, and smart home DIY builds.
⚙️ Adjustable Sensitivity — Fine-tune the light threshold with the onboard potentiometer to suit your specific environment and project needs.
🔌 High-Power Load Capability — Supports active loads up to 400 mA and passive loads up to 300 W, making it versatile for controlling a wide range of devices.
📐 Compact Form Factor — At just 45 × 38 mm, this module fits neatly into enclosures, project boxes, and breadboard setups.
🛠️ Great for Learning & Prototyping — A hands-on way to explore analog comparator circuits, sensor interfacing, and basic automation electronics.

What's in the Box?

1× LM393 Light-Controlled Switch DIY Kit (all components included)

Perfect For

Electronics hobbyists and makers
STEM students and classroom projects
Automatic lighting control circuits
Smart home and automation DIY builds
Prototyping and breadboard experimentation

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Frequently Asked Questions

Q: What does the LM393 Photosensitive Sensor Module do?

A: The LM393 Photosensitive Sensor Module detects the ambient light level in its environment and triggers a switch output accordingly. When light falls below (or rises above) a set threshold — adjusted via the onboard potentiometer — the module activates or deactivates a connected load, making it ideal for automated lighting circuits and DIY electronics projects.

Q: What load can the LM393 Light-Controlled Switch handle?

A: The module supports active load currents up to 400 mA and passive load power up to 300 W, giving you flexibility to control a variety of devices including LEDs, relays, small motors, and other electronic components in your DIY builds.

Q: Is this module beginner-friendly?

A: Yes! The LM393 DIY kit is designed to be approachable for hobbyists and students alike. It comes with all components needed to assemble the circuit, and its straightforward design makes it a great hands-on introduction to analog comparator circuits, photosensors, and basic automation electronics.

Q: What are the dimensions of the sensor board?

A: The assembled sensor module measures 45 × 38 mm — a compact size that fits easily into project enclosures, on breadboards, or within larger DIY electronic builds.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.