Fc 51 Ir Sensor Datasheet [better]

If you’ve been hunting for the elusive "official" datasheet, you’ve probably noticed it's a bit like a ghost—everyone knows what it does, but the original manufacturer's document is hard to find. Here is the definitive breakdown of everything you need to know to master this sensor. 🛠️ Technical Specifications at a Glance

Digital signal (TTL level). It outputs a Low logic level when an obstacle is detected and a High level when the path is clear.

The infrared emitting tube continuously shoots out a beam of high-frequency infrared light. Fc 51 Ir Sensor Datasheet

void loop() sensorState = digitalRead(sensorPin);

The reflected IR light is captured by the onboard IR receiver (a black photodiode). If you’ve been hunting for the elusive "official"

Reflect maximum IR light, resulting in the maximum detection range (up to 30cm).

Digital Signal (TTL levels: LOW when obstacle detected, HIGH when clear) 2cm to 30cm (Adjustable via potentiometer) Detection Angle 35° Effective Angle Comparator IC LM393 Dual Differential Comparator PCB Dimensions Mounting Hole 3mm screw hole for easy physical installation 3. Pin Configuration It outputs a Low logic level when an

While the FC-51 lacks a formal, manufacturer-published datasheet (most are generic Chinese modules), the specifications and behavior outlined above are universally accepted by the maker community. It is not a precision instrument, but for , it is an unbeatable workhorse for basic proximity sensing.

Use a small screwdriver to turn the onboard : Clockwise: Increases the detection distance threshold.