Connecting the sensor to a 9V battery, a 12V rail, or an unregulated power adapter forces too much current through the current-limiting resistors and the LM393 IC.
The module is a compact infrared obstacle avoidance sensor, typically found on a small PCB measuring about . Its primary function is to detect the presence of an object in its path by emitting and then looking for reflected infrared light. It is widely used in robotics for collision avoidance, in industrial settings for object counting, and in DIY projects for presence detection.
2cm to 30cm (Adjustable via onboard potentiometer). Detection Angle: Approximately 35°. fc 51 ir sensor datasheet hot
In conclusion, by understanding the limitations and characteristics of the FC-51 IR sensor, as outlined in its datasheet, the team was able to overcome the challenges posed by high ambient temperatures and successfully integrate the sensor into their robotics project.
The FC-51 module is straightforward to wire, featuring a simple 3-pin male header for easy connection to microcontrollers like Arduino or Raspberry Pi. Connecting the sensor to a 9V battery, a
void setup() pinMode(SENSOR_POWER, OUTPUT); pinMode(SENSOR_OUT, INPUT);
What are you using? (Arduino Uno, ESP32, Raspberry Pi, etc.) What voltage source is powering the sensor? It is widely used in robotics for collision
Use a digital multimeter to measure the actual voltage across the VCC and GND pins of the sensor while it is powered. Ensure the reading stays strictly between . If you are using an external power supply or battery pack, implement a 5V voltage regulator (such as an LM7805) to stabilize the input. Step 3: Test for Internal Damage
The module contains two main infrared components: an and an IR Receiver (Photodiode) .
Since I cannot browse the live web to provide a direct dynamic link, please replace [Insert Link] with a URL to a PDF hosted on a site like SparkFun, DatasheetsPDF, or a trusted electronics distributor.
The blue trimmer pot is carbon-track, which changes resistance with temperature. A 10°C rise can shift the threshold by 5–10%, altering the detection range. This is why your robot might detect at 15cm when cold, but only 8cm when hot.