What is the dark resistance?

Under a bright halogen lamp they range between 300-500 Ohms, in a poorly lit room (eg light of my monitor and photoresistor not directly illuminated but enough light to see) they range from 1 to 10 M Ohms then increase to 12-15 M Ohms and higher in darker parts of the room. When completely darkened with my meter on the 20M Ohm scale the resistance increases until my meter no longer can provide a value, so > 20MOhm.

Will this work on a 12v 1.3ah battery

It says in the info about it 150 volts is the maximum. I would say 12v should be fine. If not contact the vendor. I use them for Arduino or ESP32 or ATTINY85/13. I need to do more testing with them. I tried using them a few days ago and it didnt work. I need to play with them more to find out what I was doing wrong. These devices only output 5 volts so that could be the issue i am having.

Will these work in a 28 VAC circuit ?

Maximum wattage is 100 mW so 28 Volts (AC or DC) under a bright light would probably destroy them.

will these detect red laser light?

First off this product says it is manufactured by a company called “eboot”. They not an electronics parts manufacturer of any kind. You may want to contact them for the REAL manufacturer’s name and part number so that you can find the devices response to the laser. Your other option is to build a circuit and experiment with your laser perhaps using a LM339 voltage comparator etc

EBOOT 30 Pieces Photoresistor Photo Light Sensitive Resistor Light Dependent Resistor 5 mm (5539)

Product ID: 41099661

⚡150V max voltage

🔆5mm precision sensor

🌡️-30°C to 70°C operating range

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Description

🔍 Illuminate your projects with precision and power!

SEAMLESS INTEGRATION - Compact 5mm size fits perfectly into any smart sensor or IoT setup
ROBUST VOLTAGE HANDLING - Supports up to 150V DC for versatile project compatibility
PRECISION LIGHT SENSITIVITY - Spectral peak at 540 nm ensures accurate light detection every time
WIDE TEMPERATURE RESILIENCE - Operates flawlessly from -30°C to 70°C, built for real-world conditions
BULK PACK FOR ENDLESS INNOVATION - 30 high-quality photoresistors ready for your next DIY breakthrough

The EBOOT 30 Pieces Photoresistor set features 5mm GM5539 sensors with a spectral peak at 540 nm, supporting up to 150V DC and 100mW power. Designed for durability, they operate reliably between -30°C and 70°C, making them ideal for DIY electronics, IoT devices, and smart lighting projects.

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