The KY-018 Photoresistor Module by AZ-Delivery is an electronic component that functions as a light sensor. It contains a photoresistor, also known as a light-dependent resistor (LDR), which varies its resistance based on the intensity of light it is exposed to. This characteristic makes the KY-018 suitable for a wide range of applications, such as light level detection, automatic brightness control, and security systems.
This circuit is designed for a comprehensive security and access control system with motion detection, access via RFID, and a break-beam sensor. It includes a solenoid lock controlled by a relay, visual and audible alerts, and a robust power management system with solar and battery backup to ensure uninterrupted operation.
Open Project in Cirkit Designer
This circuit is a wireless joystick controller that uses an Arduino Nano to read analog signals from a KY-023 Dual Axis Joystick Module and transmits the data via an HC-05 Bluetooth Module. The system is powered by a 18650 Li-Ion battery with a rocker switch for power control.
Open Project in Cirkit Designer
This circuit interfaces a KY-023 Dual Axis Joystick Module with an Arduino 101. The joystick's X and Y axis outputs are connected to the analog inputs A0 and A1 of the Arduino, allowing it to read the joystick's position.
Open Project in Cirkit Designer
This circuit features an Arduino Nano interfaced with a KY-023 Dual Axis Joystick Module for analog input, and an NRF24L01 module for wireless communication. The joystick provides x and y-axis control signals to the Arduino's analog inputs and a switch signal to a digital input, while the NRF24L01 enables the Arduino to communicate with other devices wirelessly. The 2x 18650 batteries supply power to the Arduino, which in turn powers the joystick and the NRF24L01 module.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | VCC | Power supply (3.3V to 5V) |
| 2 | GND | Ground |
| 3 | A0 | Analog output (voltage proportional to light intensity) |
// KY-018 Photoresistor Module example code for Arduino UNO
int sensorPin = A0; // Select the input pin for the photoresistor
int sensorValue = 0; // Variable to store the value coming from the sensor
void setup() {
Serial.begin(9600); // Initialize serial communication at 9600 bits per second
}
void loop() {
sensorValue = analogRead(sensorPin); // Read the value from the sensor
Serial.println(sensorValue); // Print out the value to the Serial Monitor
delay(200); // Wait for 200 milliseconds before reading the value again
}
Q: Can I connect the KY-018 to a digital input? A: Yes, but you will only get a HIGH or LOW signal depending on the light threshold set by the potentiometer.
Q: What is the range of light intensity the KY-018 can detect? A: The KY-018 can detect a wide range of light intensities, but the exact range depends on the resistance of the LDR and the calibration of the onboard potentiometer.
Q: How do I calibrate the sensitivity of the module? A: Turn the onboard potentiometer clockwise or counterclockwise while monitoring the analog output until you reach the desired sensitivity.
Q: Is the KY-018 waterproof? A: No, the KY-018 is not waterproof and should be protected from moisture to prevent damage.