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Home / Computer Hardware, Monitors & Peripherals / Risym Photoresistor Sensor with 12V Relay Light-Controlled Switch Module Light Detection Switch

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Input Voltage 12V DC
Relay Load Capacity 10A 250VAC / 10A 30VDC
Sensor Type Photoresistor (LDR)
Sensitivity Control Adjustable Potentiometer
PCB Dimensions 35mm x 15mm
Mounting Hole Diameter 3mm
Indicator LEDs Power and Relay Status
Switch Mode Light/Dark Trigger Selectable
Operating Temperature -20°C to 60°C
Package Weight 15 grams

5 reviews

A

Anonymous

Apr 09, 2026

Rating: 5/5

Compact and effective

Fits easily into small enclosures. Wiring terminals are clear and easy to identify for beginners.

A

Anonymous

Apr 09, 2026

Rating: 5/5

Exactly what I needed

Used for a model railway lighting system. Stable performance over several weeks without any issues.

A

Anonymous

Feb 24, 2026

Rating: 4/5

Good but needs tuning

The relay functions well but took some time to adjust the potentiometer for my specific lighting conditions.

A

Anonymous

Feb 12, 2026

Rating: 5/5

Great for automation

Works perfectly with my 12V LED strip setup. Very sensitive to light changes and the relay clicks securely.

A

Anonymous

Jan 22, 2026

Rating: 3/5

Decent module

Works as intended but the LDR range is limited. Good for close proximity detection rather than large areas.

5 FAQ

Q: Does this come with connecting wires?

A: No, wires are not included. You will need to solder or use screw terminals for connections.

Q: Can I power this with 9V battery?

A: It is designed for 12V DC. Using 9V may not provide enough voltage to trigger the relay reliably.

Q: How do I reverse the light logic?

A: Use the jumper cap or switch on the board to toggle between Light and Dark trigger modes.

Q: Is the relay Normally Open or Normally Closed?

A: The module provides Common, Normally Open, and Normally Closed terminals for flexible wiring.

Q: Can it handle 220V household lights?

A: Yes, the relay is rated for 250VAC, but please ensure proper insulation and safety measures.

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