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DHT11

Name: DHT11
Rating: 4.7 (12 reviews)

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Mfr.부분 #DHT11
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데이터시트 DHT11 DataSheet
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사양

Manufacturer	Aosong (Guangzhou) Elec
Package	SIP-4

개요

Description

The DHT11 is a low-cost digital temperature and humidity sensor commonly used in electronics projects and embedded systems. It operates on a single-wire communication protocol, making it easy to interface with microcontrollers like Arduino and Raspberry Pi.
The sensor measures temperature in the range of 0 to 50 degrees Celsius with an accuracy of ±2 degrees and humidity from 20% to 80% with an accuracy of ±5% relative humidity. It requires a supply voltage of 3 to 5 volts and typically has a sampling rate of 1 Hz, providing data once every second.
The DHT11 is popular for its simplicity and affordability, making it an excellent choice for hobbyists and educators. However, it has limitations in terms of accuracy and range compared to more advanced sensors like the DHT22. Despite this, its ease of use and decent performance in basic applications make it a widely used component in DIY weather stations, home automation, and environmental monitoring systems.

Features

The DHT11 is a low-cost digital temperature and humidity sensor with the following key features:
1. Measurement Range:
- Temperature: 0 to 50°C (±2°C accuracy).
- Humidity: 20% to 80% RH (±5% accuracy).
2. Digital Output:
- Provides a single wire digital output, making it easy to interface with microcontrollers.
3. Sampling Rate:
- Updates once every second (1 Hz).
4. Power Supply:
- Operates at 3.3V to 5.5V DC.
5. Low Power Consumption:
- Suitable for battery-operated devices.
6. Compact Size:
- Small footprint for easy integration into projects.
7. Cost-Effective:
- Affordable for hobbyists and educational purposes.
8. Simple Interface:
- Requires minimal external components for operation.
These features make the DHT11 suitable for basic weather stations, HVAC systems, and various IoT applications.

Package

The DHT11 sensor typically comes in a molded plastic package, often in a rectangular form. It features a 4-pin configuration for connection, including power, ground, and data out. The compact design allows for easy integration into various projects and applications.

Pinout

The DHT11 is a popular digital temperature and humidity sensor with a total of 4 pins, which serve the following functions:
1. VCC (Pin 1): This pin is used to supply power to the sensor. Typically, it requires a voltage of 3.5 to 5.5 volts.

2. Data (Pin 2): The data pin outputs the temperature and humidity readings in a digital format. It communicates using a single-wire protocol.
3. NC (Pin 3): This pin is not connected and is typically left unused in circuit designs.
4. GND (Pin 4): This pin is connected to the ground of the circuit.
The DHT11 can measure temperature in the range of 0 to 50°C with an accuracy of ±2°C and relative humidity from 20% to 90% with an accuracy of ±5%. It is widely used in various applications like weather stations, HVAC systems, and home automation due to its simplicity and low cost.

Manufacturer

The DHT11 temperature and humidity sensor is manufactured by various companies, with one of the most notable being Aosong Electronics Co., Ltd., based in China. Aosong is a technology company that specializes in the design and production of environmental sensors, including humidity and temperature sensors, air quality sensors, and other related devices. They focus on providing affordable and reliable sensing solutions for various applications, including home automation, weather monitoring, and industrial uses. As a manufacturer, Aosong plays a significant role in the growing market for electronics and IoT (Internet of Things) devices, catering to both hobbyists and industry professionals.

Application

The DHT11 sensor is commonly used in various applications, including:
1. Weather Stations: For monitoring temperature and humidity.
2. HVAC Systems: To control heating, ventilation, and air conditioning.
3. Greenhouses: To optimize plant growth conditions.
4. Smart Home Devices: For environmental monitoring and automation.
5. Industrial Automation: To ensure optimal conditions in production areas.
6. Wearable Devices: For tracking personal health metrics related to climate.

Equivalent

Equivalent products to the DHT11 chip include the DHT22 (AM2302), which offers a wider temperature and humidity range, and the AM2301, which is similar to the DHT22 but in a different packaging. Other alternatives are the BME280, which measures temperature, humidity, and pressure, and the SHT31, known for its high accuracy in humidity and temperature readings.