Photo Cell (CdS Photoresistor)
CdS light-dependent resistor. Resistance decreases as light increases. Adafruit product 161 currently specifies approximately 1 kΩ in light and 10 kΩ in dark; either lead may be used on either side of a voltage divider.
Pinout
- Terminal 1
Symmetric photoresistor terminal; either lead may be used on either side of the divider.
Type · Unknown - Terminal 2
Symmetric photoresistor terminal; either lead may be used on either side of the divider.
Type · Unknown
| Pin | Type | Function |
|---|---|---|
| Terminal 1 | Unknown | Symmetric photoresistor terminal; either lead may be used on either side of the divider. |
| Terminal 2 | Unknown | Symmetric photoresistor terminal; either lead may be used on either side of the divider. |
Pin details
2 connections- Terminal 1
Symmetric photoresistor terminal; either lead may be used on either side of the divider.
Unknown - Terminal 2
Symmetric photoresistor terminal; either lead may be used on either side of the divider.
Unknown
Start wiring
I2C · Analog · 3.3 – 5 V · Breakout
Adafruit describes the CdS photoresistor as a light sensor whose resistance falls as light increases, and its product page gives an examp…
Light & color
79 other optionsCdS photoresistors, I2C lux sensors like VEML7700 and TSL2591, multi-channel spectral sensors, UV detectors and TCS-series color sensors — about 80 listings for anything that responds to photons.
Adafruit ALS-PT19 Analog Light Sensor Breakout visual previewAdafruit ALS-PT19 Analog Light Sensor Breakout
Adafruit APDS9960 Proximity, Light, RGB, and Gesture Sensor visual previewAdafruit APDS9960 Proximity, Light, RGB, and Gesture Sensor
Adafruit APDS9999 Proximity, Lux Light & Color Sensor visual previewAdafruit APDS9999 Proximity, Lux Light & Color Sensor
$7.50
Adafruit AS7262 6-Channel Visible Light / Color Sensor Breakout visual previewAdafruit AS7262 6-Channel Visible Light / Color Sensor Breakout
$19.95
Adafruit AS7331 UV / UVA / UVB / UVC Sensor Breakout visual previewAdafruit AS7331 UV / UVA / UVB / UVC Sensor Breakout
$22.50
Adafruit AS7341 10-Channel Light / Color Sensor Breakout visual previewAdafruit AS7341 10-Channel Light / Color Sensor Breakout
$18.95
Adafruit AS7343 14-Channel Light / Color Sensor Breakout visual previewAdafruit AS7343 14-Channel Light / Color Sensor Breakout
$19.95
Adafruit Infrared IR Remote Receiver - STEMMA JST PH 2mm visual previewAdafruit Infrared IR Remote Receiver - STEMMA JST PH 2mm
$4.95
Adafruit LTR390 UV Light Sensor - STEMMA QT / Qwiic visual previewAdafruit LTR390 UV Light Sensor - STEMMA QT / Qwiic
$4.95
Adafruit MAX44009 Wide-Range Lux Light Sensor visual previewAdafruit MAX44009 Wide-Range Lux Light Sensor
$12.50
Adafruit OPT4048 Tri-Stimulus XYZ Color and Lux Sensor visual previewAdafruit OPT4048 Tri-Stimulus XYZ Color and Lux Sensor
$9.95
Adafruit Right Angle VEML7700 Lux Sensor - I2C visual previewAdafruit Right Angle VEML7700 Lux Sensor - I2C
$4.95
Related groups
4 groups
BOSON: Heart Rate Monitor Sensor i20 visual previewBiometrics
UART/I2C fingerprint modules, MAX30102 PPG breakouts, and analog ECG/EMG front-ends for access control and hobby biometric sensing.
Sensors · Biometric sensors · 26 parts
0.3M Pixel Serial JPEG Camera Module visual previewCameras
Pi CSI modules, USB cameras, MCU-class OV2640/OV5640 boards, on-camera AI like HuskyLens and OpenMV, and thermal or ToF imagers — over 130 listings across very different pipelines.
Sensors · Cameras & vision · 141 parts
0.28 Inch LED Digital DC Voltmeter - Green visual previewPower monitors
INA-series I2C monitors, Hall-effect sensors like the ACS723 and Gravity 20A/50A boards, and non-invasive CT clamps for everything from 3.3V rail telemetry to mains current sensing.
Sensors · Current & voltage · 25 parts
25m Long Distance ToF Laser Sensor (±3cm Accuracy, 100Hz, 100K LUX Resistant) visual previewDistance sensors
About 180 listings spanning VL53-series ToF breakouts, HC-SR04 and MaxSonar ultrasonics, 360° triangulation LiDARs, IR proximity sensors, 24GHz mmWave presence detection and laser break-beam sensors.
Sensors · Distance sensors · 177 parts