Because the FC-51 provides a clean digital output, it does not require complex analog-to-digital conversion (ADC). It can be wired directly to any digital input pin on a microcontroller.
Digital TTL level (Low logic when obstacle is detected) Output Drive Capability: Clean signal, greater than 15mA Dimensions: 32mm × 14mm Mounting Hole Size: 3mm (Screw diameter) Pinout Configuration
: Counting objects passing on an assembly line. Fc 51 Ir Sensor Datasheet
| Parameter | Value | |-----------|-------| | Response Time | ~2–10 ms | | Output Frequency | ~50–100 Hz (typical) | | Settling Time after power-up | <50 ms |
2cm to 30cm (adjustable via onboard potentiometer). Detection Angle: ~35°. Because the FC-51 provides a clean digital output,
The onboard LM393 comparator compares the photodiode's voltage against a threshold set by a manual potentiometer.
Reflect IR light exceptionally well, resulting in maximum detection range. | Parameter | Value | |-----------|-------| | Response
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Illuminates only when an obstacle is detected within the set threshold range. 5. Typical Circuit Diagram and Interfacing
Clockwise rotation increases detection distance; counter-clockwise decreases it. How the FC-51 Sensor Works
The is an affordable, highly efficient electronic module widely used in robotics, automation, and smart home projects. Utilizing infrared (IR) light, this active sensor detects objects within its line of sight, making it a staple for autonomous navigation and proximity sensing.