Xiaomi Lady Bei portable facial skin moisturizer. Free Technical Library News

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Xiaomi Lady Bei Portable Face Skin Humidifier

14.08.2018

Xiaomi has introduced the Lady Bei Portable Facial Humidifier. The novelty uses an ultrasonic water atomizer with a ceramic disc that oscillates at a frequency of 110 kHz. Particles of "cold steam" with a size of only 6-8 microns (one tenth of the thickness of the hair) easily penetrate the skin, saturating it with moisture. Makeup won't stop them either.

The capacity of the transparent tank is 20 milliliters, while the humidifier is in operation, the purple backlight turns on. When the battery charge drops below 30%, it changes color to orange, and at 10% it turns red. The device is available in three colors. The function of synchronization with a smartphone was not delivered.

As a gift, the manufacturer gives a bottle of liquid with kiwi extract, clearly hoping that customers will continue to order it in the future. However, plain water will also work.

In the Chinese market, an ultrasonic humidifier can be purchased for 129 yuan - approximately 19 US dollars.

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Multi-protocol wireless microcontrollers STM32WB55 27.02.2020

STMicroelectronis has released new STM32WB55 wireless microcontrollers, which are a multiprotocol system-on-a-chip with support for Bluetooth Low Energy 5.0, ZigBee and Thread protocols.

Built around the popular low-power STM32 Cortex-M4F (50µA/MHz) core, the new chip delivers industry-leading power consumption at only 4,5mA in receive mode. The STM32WB55 also differs from existing solutions on the market with a built-in passive LCD driver, USB2.0 FS support and a large amount of memory.

General characteristics of STM32WB microcontrollers:

Clock frequency: 64 MHz;
consumption in RUN mode: 53 μA / MHz;
operating frequency: 2,4 GHz;
operating modes: receiver/transmitter;
data transfer standard: BLE0, 802.15.4/ZigBee/Thread;
up to 1024 KB Flash;
up to 256 KB SRAM;
USB 2.0 FS, LCD driver;
USART/UART, SPI, I2C;
12-bit ADC 4.26 MSPS;
AES256, random number generator (TRNG), PKA, RSA;
supply voltage: 1,71...3,6 V;
operating temperature range: -40...105°С;
packages: VFQFPN, UFBGA, WLCSP.

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