Analog vs Digital Sensor suhu, LM35 Dht11 mana yang terbaik? Arduino tutorial

Summary

In this video, the presenter compares two temperature sensors: the LM35 analog sensor and the DHT11 digital sensor. The LM35 outputs a voltage corresponding to temperature, with a 10mV per degree Celsius coefficient, while the DHT11 measures both temperature and humidity. The presenter demonstrates the working of both sensors through wiring, coding, and testing with an Arduino, highlighting the differences in their performance. While the DHT11 provides stable readings, the LM35 often requires calibration and shows less consistent results. The video concludes with a call for viewers to comment on future sensor comparisons.

Takeaways

• 😀 LM35 is an analog temperature sensor that converts temperature into a voltage output, with 10 mV per degree Celsius.
• 😀 DHT11 is a digital temperature and humidity sensor, offering stable readings for both temperature and humidity.
• 😀 LM35 requires a power supply of 4-20 V DC and has three pins: VCC, Ground, and Output.
• 😀 The DHT11 sensor has four pins: VCC (3-5V DC), Output (data pin), Not Connected, and Ground.
• 😀 The LM35 sensor offers very precise measurements but may require calibration to achieve stable readings.
• 😀 DHT11 is generally more stable than the LM35, with less need for calibration.
• 😀 The DHT11 is suitable for monitoring both temperature and humidity in a room or environment.
• 😀 Calibration of the LM35 can be tricky, as its output can change rapidly and may be inaccurate without adjustments.
• 😀 The LM35 produces an analog output, requiring an ADC (Analog to Digital Converter) in Arduino to convert the signal.
• 😀 The comparison between the LM35 and DHT11 shows that DHT11 offers more consistent results, especially in room temperature conditions.
• 😀 The tutorial includes step-by-step guidance on how to wire the sensors, set them up in Arduino, and troubleshoot if sensors are not detected.

Q & A

What is the main topic discussed in the video?

The video compares two temperature sensors: the LM35 (analog) and the DHT11 (digital).

What is the working principle of the LM35 sensor?

The LM35 sensor converts temperature into a voltage output, with a 1°C temperature change corresponding to a 10mV voltage change.

What is the power requirement for the LM35 sensor?

The LM35 operates with a single power supply of 4-20V DC.

How is the LM35 sensor output connected and used?

The LM35 has three pins: VCC (power), GND (ground), and Vout (output). The output voltage is proportional to the surrounding temperature.

What is the accuracy of the LM35 sensor?

The LM35 has a self-heating of less than 0.1°C, making it highly accurate for temperature readings.

What does the DHT11 sensor measure?

The DHT11 sensor measures both temperature and humidity in the surrounding environment.

What is the key feature of the DHT11 sensor's NTC resistor?

The NTC resistor in the DHT11 has an inverse relationship with temperature: as temperature increases, the resistance decreases.

How is the DHT11 sensor connected and powered?

The DHT11 sensor has four pins: VCC (3-5V DC), data (output), an unused pin, and GND (ground). It operates with a 3-5V DC power supply.

What is the price difference between the LM35 and the DHT11?

The DHT11 sensor is generally more expensive than the LM35 sensor.

What challenges are associated with using the LM35 sensor?

The LM35 sensor can be unstable, requiring calibration and multiple adjustments to achieve accurate and consistent temperature readings.

What can be concluded about the performance of the LM35 versus the DHT11?

The LM35 sensor, while providing a more variable output, requires calibration to stabilize readings. The DHT11, however, provides more stable and reliable temperature and humidity data.