Here is a basic wiring diagram for an Arduino-based parking lot sensor system:
Components:
- Arduino board (such as Arduino Uno).
- Ultrasonic sensor (HC-SR04) for detecting the presence of a vehicle.
- LEDs or displays for indicating occupied or vacant parking spaces.
- Resistors for appropriate current limiting.
Wiring:
- Connect the VCC pin of the ultrasonic sensor to 5V on the Arduino.
- Connect the GND pin of the sensor to the ground on the Arduino.
- Connect the Trig pin of the sensor to a digital output pin on the Arduino (let's say digital pin 8).
- Connect the Echo pin of the sensor to a digital input pin on the Arduino (such as digital pin 9).
- Connect the anodes of the LEDs (or pins of the display) to digital output pins on the Arduino through appropriate resistors. The cathodes of the LEDs are connected to ground.
The Arduino program will send a trigger signal to the ultrasonic sensor and measure the time it takes for the echo to return. Based on this time, it can calculate the distance to an object. If the distance is within a certain range, it can indicate that a parking space is occupied and light up an LED or update a display accordingly.
Please note that this is a simplified diagram and you may need to make adjustments depending on your specific requirements and components used. Additionally, proper power supply and grounding considerations should be taken into account for a stable and reliable system.