The FC-51 module features a simple 3-pin interface header, making it exceptionally easy to connect to breadboards or microcontroller development boards. Pin Number Description Input Power Supply (3.3V - 5V DC) GND Ground Reference (0V) OUT Digital Output (Active LOW) Onboard Hardware Components
The FC-51 module also has two onboard LEDs that provide immediate visual feedback: Fc 51 Ir Sensor Datasheet
The FC-51 IR sensor has three pins:
The is a workhorse of the hobby electronics world. Its datasheet reveals a simple, robust, and cost-effective solution for digital proximity and obstacle detection. With an adjustable range up to 30 cm, TTL-compatible output, and low power consumption, it is ideal for beginners and experts alike. The FC-51 module features a simple 3-pin interface
Connect the FC-51 sensor to an Arduino board using the following pin map: →right arrow Arduino 5V or 3.3V GND →right arrow Arduino GND OUT →right arrow Arduino Digital Pin 2 Sample Arduino Code With an adjustable range up to 30 cm,
This comprehensive guide serves as an expanded datasheet and application manual, covering technical specifications, pin configurations, working principles, and practical implementation. Technical Specifications Value / Range 3.3V to 5.0V DC Output Signal Digital (Low when obstacle detected, High when clear) Detection Distance 2cm to 30cm (Adjustable via potentiometer) Detection Angle Current Consumption ~20mA at 5V Main Comparator IC Dimensions 32mm × 14mm Pin Configuration and Module Layout
| Parameter | Value / Description | | :--- | :--- | | | FC-51 | | Comparator IC | LM393 | | Operating Voltage | 3.0V – 6.0V DC (5V typical) | | Current Consumption | ~23 mA at 3.3V / ~43 mA at 5.0V | | Detection Range | 2 cm to 30 cm (Adjustable) | | Detection Angle | 35° | | Output Type | Digital switching output (0 and 1) | | Output Logic | Active LOW (0V) when obstacle detected; inactive HIGH (5V) when clear | | PCB Dimensions | 3.1 cm (L) x 1.4 cm (W) | | Overall Dimensions | ~4.5 cm x 1.4 cm x 0.7 cm | | Mounting | 3 mm mounting holes |