3 از 5.0 با 5 رای
ماژول GY-21 ماژول اندازه گیری دما و رطوبت با خروجی دیجیتال است و به راحتی قابل استفاده می باشد. این سنسور توان مصرفی پایینی دارد و از طریق اتصال دو سیم و از طریق پروتکل ارتباطی I2C با میکرو ارتباط برقرار می کند و می تواند سنجش نسبی رطوبت و اندازه گیری دقیق دما را به کمک کالیبراسیون دقیق صورت گرفته انجام دهد.
مستندات:
دیتاشیت سنسور دما و رطوبت HTU21
Description:
HTU21 is a new humidity and temperature sensor by MEAS. Setting new standards in terms of size and intelligence, it is embedded in a reflow solderable Dual Flat No leads (DFN) package of 3 x 3 x 0.9 mm foot print. This sensor provides calibrated, linearized signals in analog pulse width modulated (PWM) format.
HTU21 humidity sensors are dedicated humidity and temperature plug and play transducers for OEM applications where reliable and accurate measurements are needed. These low power sensors are designed for high volume and cost sensitive applications with tight space constraints.
PWM signal runs on a base frequency of 120Hz, the data signal is provided on SDA line. Pulling SCL high or low allows for switching between humidity and temperature, respectively. The sensor measures twice per second. The PWM signal may be converted to an analog ratiometric interface by adding a low pass filter.
Application:
Automotive: defogging, HVAC
Home Appliance
Medical
Printers
Features:
Storage Temperature: -40 to 125 °C
Supply Voltage (Peak): 3.8V Vdc
Humidity Operating Range: 0 to 100 %RH
Temperature Operating Range: -40 to +125 °C
VDD to GND: -0.3 to 3.6 Vdc
Digital I/O pins: (DATA/SCK) to VDD -0.3 to VDD+0.3 Vdc
Input current on any pin: -10 to +10 mA