Light Detection & Switching Sensor Module - Dusk to Dawn
Light Detection & Switching Sensor Module for Dusk to Dawn Automation
This module detects ambient light levels and provides a digital output to switch devices on at dusk and off at dawn. Ideal for automating outdoor lights, corridor lamps, or any appliance that operates based on daylight. It features an adjustable sensitivity potentiometer to set the threshold light level.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3V–5V DC |
| Output Type | Digital (HIGH/LOW) |
| Comparator Chip | LM393 |
| Light Sensor | Photoresistor (LDR) |
| PCB Dimensions | ~32mm × 14mm |
| Adjustment | Onboard potentiometer for threshold |
What You Can Build With This
- Automatic garden or pathway lights that turn on at sunset
- Night security lighting for driveways or backyards
- Sunrise alarm or daylight-activated fan controllers
- Energy-saving daylight switch for indoor accent lamps
Compatibility
The module interfaces with any 3.3V/5V microcontroller: Arduino Uno, Nano, ESP8266, ESP32, Raspberry Pi (with level shifting if needed). Its digital output can directly drive a relay module or a transistor for higher loads. Typical pairing is with a 5V single-channel relay to switch AC appliances.
Wiring Notes
Connect VCC to 5V, GND to GND, and DO (digital output) to a GPIO pin. Adjust the potentiometer while covering the LDR to set the trigger point; the onboard LED indicates output state. Use a relay module for high-current or mains-voltage loads—never connect them directly to the module.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, it works with any Arduino board. Connect VCC to 5V, GND to GND, and DO to a digital pin like D2.
Can it switch AC loads directly?
No, this module provides a low-current digital signal. For AC loads, pair it with a relay module or solid-state relay.
How do I adjust the darkness threshold?
Turn the onboard potentiometer: clockwise increases sensitivity (triggers at lower light), counterclockwise decreases. Use the built-in LED to test, or monitor the DO pin status.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items