Fc 51 Ir Sensor Datasheet Hot Upd -

FC-51 IR Obstacle Avoidance Sensor is a cost-effective, versatile module designed for proximity detection in electronics projects. Whether you are building an autonomous robot or a touchless alarm system, understanding this module's technical specifications and calibration is key to successful integration. FC-51 Core Technical Specifications

void loop() int sensorValue = digitalRead(sensorPin); fc 51 ir sensor datasheet hot

Mechanical / connection

• Module size: Small PCB (varies by manufacturer; common ~3×1.5 cm)
• Connector: 3-pin header (VCC, GND, DO) — sometimes 4-pin including AO
• Mounting: Through-hole or solder pads; no standardized enclosure

Quick Spec Sheet (The Essentials)

• Operating Voltage: 3.3V – 5V DC (perfect for USB power)
• Detection Range: 2 cm to 30 cm (adjustable via potentiometer)
• Output: Digital (0 or 1) – high when no object detected, low when an object is present.
• Principle: Active infrared (emits IR light, measures reflection).

2.1. The LM393 Heats Up

The LM393 comparator, while low-power, still dissipates energy. At 5V and 40mA, the module consumes 0.2W. This is not much, but the FC 51 has no thermal relief. The small PCB, lack of a ground plane, and proximity of the potentiometer to the LM393 cause localized heating. FC-51 IR Obstacle Avoidance Sensor is a cost-effective,

Sample Code Snippet:

Plug-and-Play: Featuring a 3-pin header (VCC, GND, OUT), it easily connects to controllers like an Arduino. A Story of Utility Module size: Small PCB (varies by manufacturer; common

Key Specs (Typical):

Q3: Why does my FC 51 detect my hand but not a white wall?

A: Different reflectivity. Dark surfaces absorb IR. Increase potentiometer sensitivity (turn counter-clockwise). Do this after the sensor is thermally stable.