51 Ir Sensor Datasheet Hot 2021 — Fc

: Digital signal (High/Low). It outputs a LOW signal when an obstacle is detected.

: If the module is hot to the touch, check for a reverse polarity connection (VCC/GND swapped) or a short circuit in your wiring. fc 51 ir sensor datasheet hot

A phototransistor’s dark current increases exponentially with temperature (typically doubles every 10°C). As the sensor runs hot , the phototransistor sees more “background” IR even when no obstacle is present. The comparator’s fixed reference voltage is now too low, causing . : Digital signal (High/Low)

| Temperature (by touch) | Status | |------------------------|--------| | | Normal under 7–12V operation. | | Hot (~60–70°C) | Tolerable for short periods. Check your current. | | Too hot to touch (>75°C) | Likely a short, wrong voltage (>12V), or defective clone. | 75°C) | Likely a short

FC-51 IR Obstacle Avoidance Sensor is a digital infrared proximity module used primarily in robotics for object detection. It uses an LM393 voltage comparator

Slightly warm (5–10°C above ambient) is normal. If it’s hot to the touch (>50°C), you have a defective module or are running >6V.