GL5539 Photoresistor LDR 5mm 30-90kΩ (Pack of 2)
Prices updated: 14 Oct 2026
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| Store | product | Price | View in store |
|---|---|---|---|
 Makers Electronics | GL5539 Photoresistor Sensor LDR 30-90kΩ 5mm 2Pcs | 5 EGP | View in store |
Price history
Lowest daily price, last 90 days
Lowest price recorded: 5 EGP
About this product
GL5539 is a 5 mm light-dependent resistor (LDR), also called a photoresistor, whose resistance decreases as the light falling on it increases. Listed with a 30-90kΩ resistance range and fast response, it is used in automatic lighting, light-detection and security alarm projects with a microcontroller or a voltage divider.
Specifications
- Type
- Photoresistor (LDR)
- Diameter
- 5mm
- Resistance range (as listed)
- 30-90kΩ
- Quantity
- 2 pcs
- Response
- Fast
Frequently asked questions
What is the price of GL5539 Photoresistor LDR 5mm 30-90kΩ (Pack of 2) in Egypt?
GL5539 Photoresistor LDR 5mm 30-90kΩ (Pack of 2) currently costs 5 EGP in Egypt.
Where can I buy GL5539 Photoresistor LDR 5mm 30-90kΩ (Pack of 2) in Egypt?
GL5539 Photoresistor LDR 5mm 30-90kΩ (Pack of 2) is available from Makers Electronics. Compare the offers above to find the best price.
How do I read it with a microcontroller?
Connect it in a voltage divider with a fixed resistor and read the midpoint voltage on an analog input. Choose the fixed resistor so the reading changes clearly across the light levels you need to detect.
Should I measure it myself before setting a threshold?
Yes. Resistance depends on the lighting conditions, so the listed range is only a guide. Measure the LDR under your own lighting before setting a threshold in code.
