Design with ML8511 Breakout Board in Cirkit DesignerThe ML8511 Breakout Board is a compact and easy-to-use module designed for the ML8511 UV sensor. This sensor is capable of detecting ultraviolet (UV) light, which is commonly found in sunlight. The ML8511 sensor is sensitive to UV-A and UV-B wavelengths, which are the types of UV radiation most relevant for applications such as monitoring UV exposure for health and safety, UV index monitoring for weather stations, and testing UV-blocking materials.
This circuit features a Lilygo 7670e microcontroller interfaced with a 16x2 I2C LCD for display, a 4X4 membrane matrix keypad for input, and an arcade button for additional control. It also includes a 4G antenna and a GPS antenna for communication and location tracking capabilities.
Open Project in Cirkit Designer
This circuit features a LilyGo-SIM7000G module for cellular communication and GPS functionality, interfaced with an RTC DS3231 for real-time clock capabilities. It includes voltage sensing through two voltage sensor modules, and uses an 8-channel opto-coupler for isolating different parts of the circuit. Power management is handled by a buck converter connected to a DC power source and batteries, with a fuse for protection and a rocker switch for on/off control. Additionally, there's an LED for indication purposes.
Open Project in Cirkit Designer
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.
Open Project in Cirkit Designer
This circuit features an Arduino 101 microcontroller connected to a variety of peripherals. An LCD screen is interfaced via I2C for display, an RFID-RC522 module is connected for RFID reading capabilities, and two SG90 servomotors are controlled by the Arduino. Additionally, a 4x4 membrane matrix keypad is used for input, and a buzzer is included for audio feedback, all powered through a breadboard power module supplying 5V or 3.3V as needed.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | EN | Enable pin for the sensor (active high) |
| 2 | OUT | Analog output voltage from the sensor |
| 3 | 3V3 | 3.3V power supply input |
| 4 | GND | Ground connection |
Powering the Sensor: Connect the 3V3 pin to a 3.3V supply on your microcontroller board, and the GND pin to the ground.
Enabling the Sensor: The EN pin can be tied to the 3.3V supply if you want the sensor to be always on. If you wish to control the power state of the sensor, connect the EN pin to a digital output on your microcontroller.
Reading the Sensor: Connect the OUT pin to an analog input on your microcontroller. The voltage read from this pin will be proportional to the UV light intensity.
// ML8511 UV Sensor Example Code for Arduino UNO
int UVOUT = A0; // Output from the sensor
int REF_3V3 = A1; // 3.3V power on the Arduino board
void setup() {
Serial.begin(9600);
}
void loop() {
int uvLevel = averageAnalogRead(UVOUT);
int refLevel = averageAnalogRead(REF_3V3);
// Use the 3.3V power pin as a reference to get a very accurate output value from sensor
float outputVoltage = 3.3 / refLevel * uvLevel;
// Convert the voltage to a UV intensity level
float uvIntensity = mapfloat(outputVoltage, 0.99, 2.9, 0.0, 15.0);
Serial.print("UV Intensity (mW/cm^2): ");
Serial.println(uvIntensity);
delay(200);
}
// Takes an average of readings on a given analog input
int averageAnalogRead(int pinToRead) {
byte numberOfReadings = 8;
unsigned int runningValue = 0;
for (int x = 0; x < numberOfReadings; x++)
runningValue += analogRead(pinToRead);
runningValue /= numberOfReadings;
return runningValue;
}
// The Arduino Map function but for floats
float mapfloat(float x, float in_min, float in_max, float out_min, float out_max) {
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
Q: Can the ML8511 sensor detect UV-C light? A: No, the ML8511 is designed to detect UV-A and UV-B wavelengths, not UV-C.
Q: Is it necessary to use the EN pin? A: The EN pin is optional. If you do not need to control the power state of the sensor, you can tie it directly to the 3.3V supply.
Q: How can I improve the accuracy of the sensor? A: Calibration against a known UV light source and shielding from other light sources can improve accuracy. Additionally, averaging multiple readings can help reduce noise.