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GL5528 LDR Photoresistor Light Sensor — 5mm, Through-Hole, Arduino (20-Pack)
GL5528 LDR Photoresistor Light Sensor 5mm, Through-Hole, Arduino (20-Pack)
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GL5528 LDR Photoresistor Light Sensor — 5mm Through-Hole (20-Pack)
The GL5528 is a cadmium sulfide (CdS) light-dependent resistor (LDR) in a standard 5mm through-hole package. Its resistance drops dramatically from ~1MΩ in darkness to ~10kΩ in bright light, making it ideal for automatic brightness control, light-activated switches, and ambient light sensing in Arduino and embedded projects.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | GL5528 |
| Package | 5mm Through-Hole (radial) |
| Dark Resistance | ~1MΩ (at 0 lux) |
| Light Resistance @ 10 lux | 10kΩ – 20kΩ |
| Gamma Value (γ) | 0.7 typical |
| Max Voltage | 150V |
| Max Power Dissipation | 100mW |
| Spectral Peak | ~540nm (green-yellow) |
| Operating Temperature | −30°C to +70°C |
| Quantity | 20 pieces |
Why Choose GL5528?
- High Sensitivity — 100:1 resistance ratio between dark and 10-lux conditions
- Breadboard-Friendly — 5mm through-hole leads fit standard 2.54mm pitch breadboards
- No Polarity — Passive component, connect in either direction
- Wide Spectral Response — Peak at 540nm matches human eye sensitivity for natural light sensing
- Pack of 20 — Ideal for classroom kits, prototyping, and small production
Typical Applications
- Arduino automatic LED dimming and night-light circuits
- Light-activated relay switches (street lights, garden lights)
- Ambient light sensing for display brightness control
- Line-following robot light sensors
- Alarm systems with light-beam interruption detection
- Photography light meters and exposure control
Arduino Wiring
Use as a voltage divider: connect GL5528 between VCC and analog pin, with a 10kΩ resistor from analog pin to GND. Read with analogRead(A0). Higher value = darker environment.
FAQ
Q: What’s the difference between GL5516, GL5528, and GL5537?
A: They differ in light resistance range. GL5516: 5–10kΩ; GL5528: 10–20kΩ; GL5537: 20–50kΩ at 10 lux. GL5528 is the most common general-purpose choice.
Q: Can GL5528 be used outdoors?
A: Yes, within −30°C to +70°C. Protect from direct moisture; CdS cells are not waterproof.
Package Contents
- 20× GL5528 5mm LDR Photoresistor
