When the amount of ambient light exposed on the sensor’s surface varies, so does the resistance of the 12mm GL12528 Light Sensitive Photoresistor LDR. The resistance between the two leads drops as the sensor’s light intensity rises. In addition, the 12mm LDR or photoresistor sensor performs best in both light and dark environments. Light Dependent Resistors are a sort of photocell that finds exceptional usage in light detecting device applications, such as automated outdoor light ON/OFF switches or indoor automatic light switches. In electronics, photo-resistors are a basic component. There is no simpler method for detecting the amount of ambient light than using an LDR/photo-resistor.
Two photoconductive cells made of cadmium sulphide that have spectral sensitivities akin to the human eye. As the intensity of the light increases, cell resistance decreases. This product can be used in batch counting, automated lighting control, burglar alarm systems, and smoke detection. Additionally, a list of some of the applications is provided below.
Analog Applications:
- Regulation of camera exposure
- Dual cell auto slide focus
- Photocopy machines: the toner density
- Colorimetric testing apparatus
- Dual cell electronics scales for densitometers
- Modulated light source with automated gain control
- Rearview mirror automation
Digital Applications:
- Automated dimming of headlights
- Control of nightlights
- Flame out of an oil burner
- Control of streetlights
- Lack of presence (lightning rod)
- Location sensor
Additional Uses:
- Annunciator
- Automatic Photometry Camera
- electronic plaything
- industrial command
- gentle control
- Control lamp for lights
- Photovoltaic modulation switch
Qualities:
- Peak spectrum: 560 nm.
- Maximum DC voltage is 250 V.
- 200 mW maximum wattage.
- Working temperature range: -30°C to +70°C.
- Ten Lux light resistance: 10–20 KΩ.
- 2 MΩ of dark resistance
- Illumination resistance: three.
- 20 ms for rise and 30 ms for fall in response times.
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