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 is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- 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 when an object is nearby without needing physical contact. For this product it matters because the useful detection range is short, up to about 200 mm, so it suits touch-free triggers and close object detection rather than long-distance measuring.
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