SparkFun
TEPT4400 3mm Ambient Light Sensor
· MPN: SEN-22923
This Vishay TEPT4400 is a small ambient light sensor built around a silicon NPN epitaxial planar phototransistor. It is designed to respond to visible light ...
This Vishay TEPT4400 is a small ambient light sensor built around a silicon NPN epitaxial planar phototransistor. It is designed to respond to visible light in a way that is similar to the human eye.
Use it for simple light-level detection, day/night sensing, display brightness control, or maker projects that need to react to changing ambient light. The sensor has a peak sensitivity at 570 nm.
Specifications:
- Manufacturer: Vishay®
- Model: TEPT4400
- Sensor type: Silicon NPN epitaxial planar phototransistor
- Light sensitivity: Visible light much like the human eye
- Peak sensitivity: 570 nm
- Package size: 3mm
Jargon buster
Plain-language definitions for the technical terms used above.
- Ambient light sensor
- A sensor that measures the general brightness of light falling on it, similar to how a device can adjust screen brightness automatically. It matters when you want a project to react to room lighting, daylight, shadows, or covered/uncovered conditions.
- phototransistor
- A light-sensitive transistor that changes its electrical output when light hits it. Compared with a modulated IR receiver, a simple phototransistor can be more affected by ambient light, so it may need extra filtering or careful setup.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
Find this product in
TEPT4400 Ambient Light Sensor Datasheet
Datasheet · 102.0 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 258.3 KB · Click any page to view full size
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