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 .
The module typically features a 3-pin male header for easy interfacing with microcontrollers like Arduino or Raspberry Pi. Go to product viewer dialog for this item. fc 51 ir sensor datasheet hot
As they worked, they stumbled upon an obscure forum post from a robotics enthusiast who had encountered a similar problem. The user, 'ElectroGuru,' had shared a modified datasheet with additional thermal characteristics, which seemed to match the FC-51's behavior. fc 51 ir sensor datasheet hot