Main power input. Adafruit Learn says to power it with the same logic level as the microcontroller, for example 5 V on a 5 V Arduino.
3.3 V regulator output. Learn states up to 100 mA may be drawn from this output.
Common ground for power and logic.
I2C clock line. Learn states it has a 10K pullup and is level shifted for 3-5 VDC use.
I2C data line. Learn states it has a 10K pullup and is level shifted for 3-5 VDC use.
Interrupt output. Learn states it is 3 V logic and can indicate a new reading or threshold event.
STEMMA QT connector for I2C connection to STEMMA QT boards or accessories.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VIN | power | Main power input. Adafruit Learn says to power it with the same logic level as the microcontroller, for example 5 V on a 5 V Arduino. | 3-5V logic/power context from Learn page | |
| 3Vo | power | 3.3 V regulator output. Learn states up to 100 mA may be drawn from this output. | 3.3V output, up to 100mA | |
| GND | ground | Common ground for power and logic. | ||
| SCL | signal | I2C clock line. Learn states it has a 10K pullup and is level shifted for 3-5 VDC use. | 3-5VDC level-shifted logic |
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…
Module pins: VIN, 3Vo, GND, SCL, SDA, INT. Schematik maps them to your board in the app.
CdS 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.
Photo Cell (CdS Photoresistor) visual previewPhoto Cell (CdS Photoresistor)
Loose CdS light-dependent resistor for simple analog light sensing. Useful for light/dark thresholds and approximate brightness, not color detection.
TCS3200 Color Sensor visual previewTCS3200 Color Sensor
TCS3200-based color sensor module with onboard illumination. Use when the design needs color-channel detection and can handle a digital frequency output.
Adafruit ALS-PT19 Analog Light Sensor Breakout visual previewAdafruit ALS-PT19 Analog Light Sensor Breakout
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Adafruit AS7331 UV / UVA / UVB / UVC Sensor Breakout visual previewAdafruit AS7331 UV / UVA / UVB / UVC Sensor Breakout
Adafruit AS7341 10-Channel Light / Color Sensor Breakout visual previewAdafruit AS7341 10-Channel Light / Color Sensor Breakout
Adafruit AS7343 14-Channel Light / Color Sensor Breakout visual previewAdafruit AS7343 14-Channel Light / Color Sensor Breakout
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Adafruit MAX44009 Wide-Range Lux Light Sensor visual previewAdafruit MAX44009 Wide-Range Lux Light Sensor
Biomedical Sensor Pad (10 pack) visual preview
BOSON: Heart Rate Monitor Sensor i20 visual preview
Capacitive Fingerprint Reader visual preview
Capacitive Fingerprint Reader (B) visual previewUART/I2C fingerprint modules, MAX30102 PPG breakouts, and analog ECG/EMG front-ends for access control and hobby biometric sensing.
Sensors · Biometric sensors · 24 parts
0.3M Pixel Serial JPEG Camera Module visual preview
100X Industrial Microscope Lens for Raspberry Pi HQ Camera visual preview
12.3MP Camera Module for NVIDIA Jetson Nano & Raspberry Pi CM3 visual preview
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Sensors · Cameras & vision · 139 parts
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Adafruit INA219 FeatherWing visual preview
Adafruit INA219 High Side DC Current Sensor Breakout STEMMA QT visual previewINA-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 · 24 parts
VL53L1X Time of Flight (ToF) Sensor Breakout visual preview
Solid State TOF LiDAR - CE30-A visual preview
25m Long Distance ToF Laser Sensor (±3cm Accuracy, 100Hz, 100K LUX Resistant) visual preview
4-20HR-MaxSonar-WRMI MB7489 Waterproof Ultrasonic Distance Sensor (50~500cm, IP67) visual previewAbout 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 · 178 parts
| SDA | signal | I2C data line. Learn states it has a 10K pullup and is level shifted for 3-5 VDC use. | 3-5VDC level-shifted logic |
| INT | signal | Interrupt output. Learn states it is 3 V logic and can indicate a new reading or threshold event. | 3V logic |
| STEMMA QT | connector | STEMMA QT connector for I2C connection to STEMMA QT boards or accessories. |
