KY-018 Photoresistor Sensor Module for Arduino & ESP32

Upgrade your interface with crisp visuals.
This 12864 Graphic LCD Module delivers a sharp 128x64 pixel resolution on a stunning blue backlight with white pixels. Built with the versatile ST7920 controller, it supports both Parallel and SPI Serial modes, allowing you to save precious I/O pins on your Arduino or microcontroller. Perfect for displaying complex graphics, charts, and custom text.

• High-Res Graphic Display: 128x64 dot matrix resolution enables text, images, and graph rendering.
• Crisp Visibility: Deep blue background with bright white pixels provides excellent contrast and aesthetics.
• Dual Interface Modes: Supports both 6800 8-bit Parallel and Serial (SPI) modes (Selectable via Pin 15 PSB).
• Standard 5V Logic: Seamlessly compatible with Arduino UNO, Mega, and other 5V logic controllers.
• Adjustable Contrast: Dedicated V0 pin allows for precise brightness and contrast tuning via potentiometer.
• Robust Mounting: Four corner mounting holes (3mm) for secure installation in enclosures.

Give Your Projects the Gift of Sight

In the world of smart electronics, detecting environmental changes is key to automation. The KY-018 Photoresistor Sensor Module is the standard for reliable, low-cost light detection. Whether you are a STEM student learning the basics of analog signals or an engineer prototyping a smart garden system, this module provides the precision you need without the complexity.

How It Works

At its core, this module utilizes a high-quality Light Dependent Resistor (LDR). Its internal resistance changes drastically based on the ambient light hitting the sensor head.

• In Bright Light: Resistance drops, allowing more current to flow (higher signal voltage).
• In Darkness: Resistance increases, reducing current flow (lower signal voltage).

By reading these analog voltage changes with a microcontroller (like an Arduino), you can program triggers—such as turning on an LED when the room gets dark.

Why Choose the KY-018?

Unlike raw components that require breadboarding complex voltage dividers, the KY-018 comes pre-soldered on a durable PCB with a 10kΩ pull-down resistor included. This "Plug-and-Play" design saves you time and ensures a stable signal reading right out of the box.

• Local delivery within Hong Kong and in-store pickup.​
• Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
• Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
• Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
• In-store pickup details (location and time) will be confirmed by email or phone message.​
• Delivery times are estimates and may be affected by weather or unforeseen circumstances.​