The MKE-S11 IR Infrared Obstacle Avoidance Sensor is an electronic device designed to detect the presence of obstacles through infrared reflection. It is widely used in robotics, automation projects, and interactive installations to prevent collisions by sensing objects in the path of a moving device. The sensor operates by emitting an infrared signal and then detecting the reflected signal from nearby objects.
Explore Projects Built with MKE-S11 IR Infrared Obstacle Avoidance Sensor
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This circuit features a MakerEdu Creator microcontroller board interfaced with two MKE-S11 IR Infrared Obstacle Avoidance Sensors, a MKE-M02 Push Button Tact Switch, a MKE-M15 Bluetooth module, and a MKE-M08 LCD2004 I2C display module. The push button is connected to a digital input for user interaction, while the IR sensors are likely used for detecting obstacles. The Bluetooth module enables wireless communication, and the LCD display provides a user interface for displaying information or statuses.
This circuit is a multi-sensor monitoring system using an Arduino Nano and an ESP32. It includes sensors for obstacle detection (IR sensors), air quality (MQ135), and temperature/humidity (DHT11), with visual indicators (LEDs) and an auditory alert (buzzer). The system is powered by a 18650 Li-ion battery pack regulated by a 7805 voltage regulator.
This circuit consists of two FC-51 IR Obstacle Sensors connected to two KF-301 relays, which likely serve as triggers for switching the relays. Four gearmotors are powered through two XL6009E1 Boost Converters, which are likely used to step up the voltage from a 2-cell 18650 Li-ion battery pack. The relays appear to control the power flow to the boost converters, and thus to the gearmotors, based on the obstacle detection inputs.
This circuit features an ESP32 Devkit V1 microcontroller interfaced with an IR sensor, an HC-SR04 ultrasonic sensor, and a DHT11 temperature and humidity sensor. The ESP32 reads obstacle detection from the IR sensor, distance measurements from the ultrasonic sensor, and environmental data from the DHT11 sensor. It then sends this data to a server via Wi-Fi, likely for remote monitoring or data logging purposes.
Interactive installations: user presence detection
Security systems: intrusion detection
Technical Specifications
Key Technical Details
Operating Voltage: 3.3V to 5V DC
Current Consumption: 20mA
Output Type: Digital signal (0V or 5V)
Detection Range: 2cm to 30cm (adjustable)
Detection Angle: 35°
Ambient Light Resistance: Good
Operating Temperature: -10°C to +50°C
Pin Configuration and Descriptions
Pin Number
Pin Name
Description
1
VCC
Power supply (3.3V to 5V DC)
2
GND
Ground
3
OUT
Digital output signal (LOW when detected)
Usage Instructions
How to Use the Component in a Circuit
Power Connection: Connect the VCC pin to a 3.3V or 5V power supply and the GND pin to the ground of your circuit.
Output Connection: Connect the OUT pin to a digital input pin on your microcontroller (e.g., Arduino UNO).
Adjustment: Use the onboard potentiometer to adjust the detection range as per your requirement.
Important Considerations and Best Practices
Ensure that the sensor is not exposed to direct sunlight or strong artificial light sources to prevent false detections.
Avoid placing the sensor in an environment with high dust or moisture levels.
The sensor should be mounted securely to minimize vibrations that could affect its readings.
Keep the sensor's lens clean and unobstructed.
Example Code for Arduino UNO
// Define the pin connected to the sensor's output
const int obstacleSensorPin = 2;
void setup() {
// Initialize the sensor's output pin as an input
pinMode(obstacleSensorPin, INPUT);
// Begin serial communication at a baud rate of 9600
Serial.begin(9600);
}
void loop() {
// Read the sensor's output
int sensorValue = digitalRead(obstacleSensorPin);
// If the sensor's output is LOW, an obstacle is detected
if (sensorValue == LOW) {
Serial.println("Obstacle detected!");
} else {
Serial.println("Path is clear.");
}
// Wait for 200 milliseconds before the next reading
delay(200);
}
Troubleshooting and FAQs
Common Issues Users Might Face
Sensor Always Indicates an Obstacle: Check if the detection range is properly adjusted using the onboard potentiometer. Ensure that the sensor is not facing a permanent obstacle or highly reflective surface.
Intermittent False Readings: Verify that the sensor is not exposed to direct or strong artificial light. Check for loose connections and ensure that the power supply is stable.
No Output Signal: Confirm that the sensor is correctly powered and that the OUT pin is connected to the correct digital input on the microcontroller.
Solutions and Tips for Troubleshooting
Adjust the potentiometer slowly while monitoring the output to find the optimal detection range.
Use a multimeter to check for proper voltage levels at the VCC and GND pins.
If using long wires, consider using shielded cables to reduce electrical noise.
FAQs
Q: Can the sensor detect transparent objects?
A: The sensor may have difficulty detecting transparent or highly reflective objects due to the nature of infrared light.
Q: Is it possible to use multiple sensors in one project?
A: Yes, multiple sensors can be used but ensure they are spaced adequately to prevent cross-talk and interference.
Q: How can I extend the detection range of the sensor?
A: The detection range is fixed and can only be adjusted within the specified limits using the onboard potentiometer. For longer ranges, consider using a different model or type of sensor.
Remember to always follow safety guidelines when working with electronic components and ensure that all connections are secure before powering your circuit.
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