Fc 51 Ir Sensor Datasheet Hot Jun 2026
The FC-51 IR sensor datasheet provides detailed information on the sensor's specifications, including:
April 12, 2026 Topic: Sensor Troubleshooting & Datasheet Analysis
, it is likely due to a wiring error or exceeding voltage limits , as it is designed for low-power operation. Art of Circuits FC-51 Sensor Technical Datasheet Specification Operating Voltage 3.0V – 6.0V DC (3.3V/5V recommended) Current Consumption ~23 mA at 3.3V; ~43 mA at 5.0V Detection Range 2cm – 30cm (Adjustable via potentiometer) Detection Angle Output Signal Digital (Low when obstacle detected; High otherwise) Main Components IR Transmitter, IR Receiver, LM393 Comparator Dimensions ~4.5cm x 1.4cm x 0.7cm Troubleshooting: Why is the Sensor Hot? fc 51 ir sensor datasheet hot
The clear IR LED itself and its adjacent SMD resistor become hot, rather than the LM393 chip. Step-by-Step Troubleshooting and Solutions
The FC-51 is easy to interface with microcontrollers like Arduino, ESP32, or Raspberry Pi. Connect to 3.3V - 5V GND: Connect to GND OUT: Digital Output Pin Sample Arduino Code The FC-51 IR sensor datasheet provides detailed information
and observe the two on‑board LEDs:
| Specification | Details | | :--- | :--- | | | FC-51 | | Operating Voltage | 3.0V – 6.0V DC (3.3V – 5V DC typical) | | Current Consumption | ~23mA at 3.3V, ~43mA at 5.0V | | Detection Range | 2cm – 30cm (adjustable via potentiometer) | | Detection Angle | 35° | | Output Type | Digital switching output (0 and 1) | | Output Logic | Active Low : Outputs LOW (0V) when obstacle is detected Inactive High : Outputs HIGH (~5V) when no obstacle is detected | | Comparator IC | LM393 | | Board Dimensions (PCB) | 3.1cm (L) x 1.4cm (W) | | Overall Dimensions | 4.5cm (L) x 1.4cm (W) x 0.7cm (H) | Step-by-Step Troubleshooting and Solutions The FC-51 is easy
“When I looked at the two LEDs on the board I tried to re‑align them a bit. The two LEDs are very sensitive. When I pushed the two LEDs toward each other, the detection distance went to more than 35 cm (though a bit unstable). I finally got the right setup around 30 cm and fine‑tuned it with the potentiometer to 20 cm.” – Arduino Forum user