Pololu
Pololu 38 kHz IR Proximity Sensor, Fixed Gain, High Brightness
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This module features a fixed-gain, 38 kHz modulated IR sensor and a corresponding IR LED with oscillator circuit to make a tiny proximity sensor. This ...
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This module features a fixed-gain, 38 kHz modulated IR sensor and a corresponding IR LED with oscillator circuit to make a tiny proximity sensor. This high-brightness version draws an average of 16 mA at 5 V and has a typical sensing range up to approximately 24 inches (60 cm).
Jargon buster
Plain-language definitions for the technical terms used above.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- modulated IR
- Infrared light that is pulsed in a controlled pattern instead of being left on continuously. Using modulation helps the sensor distinguish the intended IR source from sunlight, room lighting, and other background infrared.
- Proximity sensor
- A sensor that detects the presence of a nearby object without physical contact, using methods such as infrared, ultrasonic, capacitive, inductive or time-of-flight. Useful ranges vary widely between types, from a few millimetres to several metres, so check a given sensor's specified range to see whether it suits close-up touch-free triggers or longer-distance detection.
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