COLOR CONTROL OF THE DEVICE WITH LED TAPE ON THE VALUE OF TEMPERATURE AND HUMIDITY OF AIR

2021 ◽  
pp. 53-56
Author(s):  
O. Yu. Kovalenko ◽  
M. D. Rybko ◽  
S. A. Mikaeva ◽  
Yu. A. Zhuravleva
Keyword(s):  
High Temperatures ◽  
Power Supply ◽  
Flash Memory ◽  
Humidity Sensor ◽  
Voltage Regulator ◽  
Lighting Device ◽  
Temperature And Humidity ◽  
Color Control ◽  
Avr Microcontroller

The work is devoted to the development of a lighting device with control of the color of the LED strip depending on the value of temperature and humidity. To develop a prototype of a lighting installation, an A-Star 32U4 Micro microcontroller (analogue of Arduino Micro), 2 pieces of RGB tape of 5 and 10 cm each, a DHT11 temperature and humidity sensor, connecting wires, a case were purchased. The A-Star 32U4 Micro microcontroller used in the proposed setup is a universal programmable module based on the ATmega32U4 AVR microcontroller from Microchip (formerly Atmel), which has 32KB flash memory, 2.5KB RAM, and builtin USB functionality. A voltage regulator and power selection circuitry allows the board to be powered from either USB or an external 5.5V to 15V supply, while a resettable PTC fuse on the USB VBUS power supply and reverse protection on the VIN help protect it from accidental damage. In the course of the work, studies were carried out on the operation of the installation under normal conditions and at low and high temperatures.

Apparatus chromaticity control

2021 ◽  
Author(s):  
Keyword(s):  
Flash Memory ◽  
Optical Radiation ◽  
Humidity Sensor ◽  
Light Emitting Diode ◽  
Digital Signal ◽  
Light Emitting ◽  
Lighting Device ◽  
Temperature And Humidity ◽  
Avr Microcontroller

The article is devoted to the development of a lighting apparatus with chromaticity control of the LED strip depending on the temperature and humidity. To develop a prototype of a lighting installation, an A-Star 32U4 Micromicrocontroller (analogous to ArduinoMicro) and a DHT11 temperature and humidity sensor are used. The A-Star 32U4 Micro microcontroller is a universal programmable module based on the ATmega32U4 AVR microcontroller from Microchip (formerly Atmel) which has 32 KB flash memory, 2.5 KB RAM and built-in USB functionality. Keywords optical radiation; light-emitting diode; LED strip; lighting device; chromaticity; temperature; humidity; thermistor; sensor; microcontroller; chip; digital signal

Síntesis sencilla de óxido de tungsteno(VI) a partir del filamento de un foco

2011 ◽  
Vol 19 (4) ◽  
pp. 341
Author(s):  
Joel Díaz Reyes ◽  
Aarón Pérez-Benítez ◽  
Valentín Dorantes
Keyword(s):  
Infrared Spectroscopy ◽  
High Temperatures ◽  
Power Supply ◽  
Light Bulb ◽  
Electrochromic Devices ◽  
Tungsten Filament ◽  
Tungsten Oxides ◽  
Ac Power

<span>Tungsten(VI) oxide can be easily synthesized starting from a standard light bulb. The reaction consists in the oxidation at high temperatures (T ≈ 2000 – 3000° C) of a tungsten filament in presence of air; conditions which can be easily achieved by connecting a broken light bulb (but with its intact filament) to an AC-power supply of 110 volts. The vapor of WO3 is condensed into a beaker in a quantity enough to be characterized by infrared spectroscopy. The experiment is very funny, inexpensive and allows to the teacher to link several topics in current chemistry and physics of the tungsten oxides, such as their nomenclature and technological applications (i.e. electrochromic devices, gasochromic sensors, superalloys or as it is used in home: As a “simple” emisor of light!).</span>

Power losses reduction in a variable linear power supply using the LM317 voltage regulator

2020 ◽  
Author(s):  
Amira Haddouk ◽  
Khaoula Khlifi ◽  
Vitor Monteiro ◽  
Joao L. Afonso ◽  
Hfaiedh Mechergui
Keyword(s):  
Power Supply ◽  
Voltage Regulator ◽  
Power Losses

Study on the Development of Lighting Devices Material Combined with Street Lamp in the Use of Rays of the Sun

2017 ◽  
Vol 864 ◽  
pp. 224-228
Author(s):  
Seung Hyeon You ◽  
Jeong Hwan Lee ◽  
Sung Hoon Oh
Keyword(s):  
Power Supply ◽  
Economic Value ◽  
The Sun ◽  
Led Light ◽  
Lighting Device ◽  
The Future ◽  
Street Lamp ◽  
External Power ◽  
The City

This study has developed street lamp lighting device material that was turned on and off by self-power supply without additional power by using the rays of the sun. Lighting devices have been applied with polycarbonate materials that were outstanding with light transmissivity while using LED light and economic value. Lighting devices are easily installed in various places since external power is not necessary. In addition, it also serves as a function of preventing crime by acquiring intensity of illumination in crime-ridden district in the night. Lighting device can also serve as a function of improving fine view in the city by establishing eco-friendly circumstances including parks, areas around shopping district, and housing areas after being manufactured in the form of flowerpot where can grow plants in the future.

Perancangan Sistem Pengaturan Suhu Ruangan Otomatis Berbasis Mikrokontroler

2019 ◽  
Vol 8 (1) ◽  
pp. 95
Author(s):  
I Wayan Gede Partamayasa ◽  
I Ketut Gede Suhartana ◽  
I Wayan Supriana
Keyword(s):  
High Temperatures ◽  
Room Temperature ◽  
Network Communication ◽  
The Internet ◽  
Humidity Sensors ◽  
Temperature And Humidity ◽  
Communication Devices ◽  
Internet Network

A server room is a room that is used to store servers, network communication devices such as routers and switches, and other operational related devices. Server rooms that have high temperatures and humidity will affect the performance of all devices, so the temperature and humidity of the server room must be maintained so that the device is not easily damaged. So from that, the company needs to implement a standard to protect the performance of the devices stored in it. To overcome this problem a device was developed that can automatically control and monitor temperature and humidity. The system will be built using temperature and humidity sensors that are used to monitor the temperature of the room, the condition of the room temperature and humidity of the room will be displayed through a website that can be accessed through the internet network.

scholarly journals Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5469
Author(s):  
Xiuxiu Xu ◽  
Mingming Luo ◽  
Jianfei Liu ◽  
Nannan Luan
Keyword(s):  
Fiber Bragg Grating ◽  
Humidity Sensor ◽  
Field Tests ◽  
Polyimide Film ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Sensing Applications ◽  
Fluorinated Polyimide ◽  
Temperature And Humidity ◽  
Fluoride Doping

We propose and demonstrate a temperature and humidity sensor based on a fluorinated polyimide film and fiber Bragg grating. Moisture-induced film expansion or contraction causes an extra strain, which is transferred to the fiber Bragg grating and leads to a humidity-dependent wavelength shift. The hydrophobic fluoride doping in the polyimide film helps to restrain its humidity hysteresis and provides a short moisture breathing time less than 2 min. Additionally, another cascaded fiber Bragg grating is used to exclude its thermal crosstalk, with a temperature accuracy of ±0.5 °C. Experimental monitoring over 9000 min revealed a considerable humidity accuracy better than ±3% relative humidity, due to the sensitized separate film-grating structure. The passive and electromagnetic immune sensor proved itself in field tests and could have sensing applications in the electro-sensitive storage of fuel, explosives, and chemicals.

scholarly journals Highly Sensitive Temperature and Humidity Sensor Based on Carbon Nanotube-Assisted Mismatched Single-Mode Fiber Structure

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 521 ◽  
Author(s):  
Yuan ◽  
Qian ◽  
Liu ◽  
Wang ◽  
Yu
Keyword(s):  
Carbon Nanotube ◽  
Humidity Sensor ◽  
Single Mode ◽  
Small Region ◽  
Single Mode Fiber ◽  
Fiber Structure ◽  
Humidity Sensing ◽  
Highly Sensitive ◽  
Temperature And Humidity ◽  
Stable Performance

Here we report on a miniaturized optical interferometer in one fiber based on two mismatched nodes. The all-fiber structure shows stable performance of temperature and humidity sensing. For temperature sensing in large ranges, from 40 to 100 °C, the sensor has a sensitivity of 0.24 dB/°C, and the adjusted R-squared value of fitting result reaches 0.99461 which shows a reliable sensing result. With carbon nanotubes coating the surface of the fiber, the temperature sensitivity is enhanced from 0.24561 to 1.65282 dB/°C in a small region, and the performance of humidity sensing becomes more linear and applicable. The adjusted R-squared value of the linear fitting line for humidity sensing shows a dramatic increase from 0.71731 to 0.92278 after carbon nanotube coating, and the humidity sensitivity presents 0.02571 nm/%RH.

scholarly journals A Transient-Enhanced Voltage Regulator with Stability and Power-Supply-Rejection Boosting

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Yue Shi ◽  
Anqi Wang ◽  
Jianwen Cao ◽  
Zekun Zhou
Keyword(s):  
Power Supply ◽  
Low Voltage ◽  
Input Voltage ◽  
Voltage Regulator ◽  
Load Range ◽  
Load Regulation ◽  
The Stability ◽  
Output Capacitor ◽  
Better Than ◽  
Supply Rejection

AbstractA high-stability voltage regulator (VR) is proposed in this paper, which integrates transient enhancement and overcurrent protection (OCP). Taken into consideration the performance and area advantages of low-voltage devices, most control parts of proposed VR are supplied by the regulated output voltage, which forms self-power technique (SPT) with power supply rejection (PSR) boosting. Besides, the stability and transient response are enhanced by dynamic load technique (DLT). An embedded overcurrent feedback loop is also adopted to protect the presented VR from damage under overload situations. The proposed VR is implemented in a standard 350 nm BCD technology, whose results indicate the VR can steadily work with 5.5–30 V input voltage, 0–30 mA load range, and 0.1–3.3 μF output capacitor. A 2.98 μV/V line regulation and a 0.233 mV/mA load regulation are achieved with a 40 mA current limiting. The PSR is better than − 64 dB up to 10 MHz with a 0.1 μF output capacitor.

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