What you are using (Arduino, ESP32, Raspberry Pi)? What is your target obstacle material ?
Below is a comprehensive table of the FC-51’s electrical and optical characteristics. While different manufacturers may have slight variations, these values represent the standard for the clone modules widely available.
delay(200);
: Digital output pin that provides a signal based on detection status. Working Principle
Before diving into the datasheet numbers, let's look at the physical interface. The FC-51 module typically has (although some variants have 4, with an extra analog output pin). Fc 51 Ir Sensor Datasheet
However, finding a clear, consolidated datasheet for the FC-51 can be frustrating. Most sellers provide only a pinout diagram. In this post, we have compiled the essential technical specifications, pin configuration, wiring guide, and application tips you would find in a standard datasheet.
Placed along conveyor belts to count passing items in manufacturing setups. What you are using (Arduino, ESP32, Raspberry Pi)
Choose FC-51 for simple “object present/not present” binary detection from 2-30 cm. Avoid for distance measurement or shiny/black objects.
The module features a standard 3-pin male header for easy interfacing. The FC-51 module typically has (although some variants
The FC-51 is an active infrared proximity sensor designed to detect obstacles or surfaces within a short range. Because it uses light reflection to sense objects, it is commonly used in line-following robots, obstacle-avoiding cars, security systems, and factory assembly lines.
Note: Some variants include a fourth pin labeled . When EN is grounded or left disconnected, the sensor is active. When pulled HIGH, the sensor enters a low-power standby mode. Onboard Components and Calibration
