Circuit Documentation

Summary of the Circuit

This circuit is designed around an Arduino UNO microcontroller, which serves as the central processing unit. The circuit includes a variety of sensors and output devices, including an LDR (Light Dependent Resistor), a DHT11 temperature and humidity sensor, an HC-SR501 motion sensor, and an LED with a series resistor. The Arduino UNO is responsible for interfacing with these components, processing sensor data, and controlling the LED based on certain conditions.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Purpose: Acts as the central processing unit for the circuit, interfacing with sensors and controlling outputs.

Resistor (200 Ohms)

• Description: A passive two-terminal electrical component that implements electrical resistance as a circuit element.
• Purpose: Limits current to the LED to prevent damage.

HC-SR501 Motion Sensor

• Description: A PIR sensor module that detects motion by measuring changes in the infrared levels emitted by surrounding objects.
• Purpose: Provides motion detection capabilities to the circuit.

LED: Two Pin (Red)

• Description: A two-pin light-emitting diode that emits red light when powered.
• Purpose: Acts as an indicator or output device that can be controlled by the Arduino.

LDR (Light Dependent Resistor)

• Description: A type of photoresistor that changes resistance based on the ambient light level.
• Purpose: Senses the ambient light level for the circuit to make decisions based on lighting conditions.

DHT11

• Description: A basic, ultra low-cost digital temperature and humidity sensor.
• Purpose: Measures the ambient temperature and humidity for environmental monitoring.

Wiring Details

Arduino UNO

• 5V connected to:
  • LDR VCC
  • DHT11 VCC
  • HC-SR501 VCC
• GND connected to:
  • LDR GND
  • DHT11 GND
  • HC-SR501 GND
  • LED cathode (through Resistor)
• A0 connected to LDR A0
• D13 connected to Resistor pin2
• D4 connected to DHT11 DATA
• D3 connected to LDR D0
• D2 connected to HC-SR501 OUT

Resistor (200 Ohms)

• pin1 connected to LED anode
• pin2 connected to Arduino UNO D13

HC-SR501 Motion Sensor

• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• OUT connected to Arduino UNO D2

LED: Two Pin (Red)

• anode connected to Resistor pin1
• cathode connected to Arduino UNO GND

LDR

• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• A0 connected to Arduino UNO A0
• D0 connected to Arduino UNO D3

DHT11

• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• DATA connected to Arduino UNO D4

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Note: The provided code is a template and does not include specific functionality. It should be populated with setup and loop routines to interact with the connected components based on the circuit's requirements.