The module typically features a 3-pin header for easy interfacing: Connect to 3.3V - 5V power source. GND: Connect to the circuit ground.
The is a popular, cost-effective module used widely in robotics for obstacle avoidance and proximity detection. Using a simple infrared "reflection" principle, it identifies objects by bouncing IR light off surfaces and measuring the return signal. FC-51 Key Technical Specifications Specification Operating Voltage 3.0V – 6.0V DC Detection Range 2cm – 30cm (Adjustable via onboard potentiometer) Detection Angle Current Consumption ~23 mA at 3.3V; ~43 mA at 5.0V Output Type Digital signal (0 or 1) Onboard IC LM393 Dual Comparator Pinout Configuration Fc 51 Ir Sensor Datasheet
The FC-51 IR Sensor: Your Robot’s Secret "Spidey Sense" Ever wondered how those clever little vacuum robots avoid tumbling down the stairs or crashing into your favorite vase? Most of the time, they’re using a "Spidey sense" powered by infrared light. At the heart of many beginner DIY projects is the FC-51 IR Obstacle Avoidance Sensor The module typically features a 3-pin header for
| Condition | Output Pin | Output LED | | :--- | :--- | :--- | | No object in front | HIGH (1) | OFF | | Object within set range | LOW (0) | ON | At the heart of many beginner DIY projects
| Pin Name | Description | |----------|-------------| | | Power supply (3.3–5V) | | GND | Ground | | OUT | Digital output (0V when obstacle present, Vcc when no obstacle) | | EN | Enable pin (leave floating or pull HIGH to enable; LOW may disable) – not always present on all clones |
3.0V to 6.0V DC (Typically used at 3.3V or 5V). Current Consumption: ~23 mA at 3.3V. ~43 mA at 5.0V.
The FC-51 IR sensor has the following features: