The Experts below are selected from a list of 435 Experts worldwide ranked by ideXlab platform
Darren Leigh - One of the best experts on this subject based on the ideXlab platform.
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very low cost sensing and communication using bidirectional leds
Ubiquitous Computing, 2003Co-Authors: Paul Henry Dietz, William S Yerazunis, Darren LeighAbstract:A novel microprocessor interface circuit is described which can alternately emit and detect light using only an LED, two digital I/O pins and a single Current Limiting Resistor. This technique is first applied to create a smart illumination system that uses a single LED as both light source and sensor. We then present several devices that use an LED as a generic wireless serial data port. An important implication of this work is that every LED connected to a microprocessor can be thought of as a wireless two-way communication port. We present this technology as a solution to the “last centimeter problem”, because it permits disparate devices to communicate with each other simply and cheaply with minimal design modification.
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1. Version submitted to Ubicomp 2003. Very Low-Cost Sensing and Communication Using Bidirectional LEDs
2003Co-Authors: William S Yerazunis, Darren Leigh, Paul DietzAbstract:A novel microprocessor interface circuit is described which can alternately emit and detect light using only an LED, two digital I/O pins and a single Current Limiting Resistor. This technique is first applied to create a smart illumination system that uses a single LED as both light source and sensor. We then present several devices that use an LED as a generic wireless serial data port. An important implication of this work is that every LED connected to a microprocessor can be thought of as a wireless two-way communication port. We present this technology as a solution to the “last centimeter problem”, because it permits disparate devices to communicate with each other simply and cheaply with minimal design modification
Paul Henry Dietz - One of the best experts on this subject based on the ideXlab platform.
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very low cost sensing and communication using bidirectional leds
Ubiquitous Computing, 2003Co-Authors: Paul Henry Dietz, William S Yerazunis, Darren LeighAbstract:A novel microprocessor interface circuit is described which can alternately emit and detect light using only an LED, two digital I/O pins and a single Current Limiting Resistor. This technique is first applied to create a smart illumination system that uses a single LED as both light source and sensor. We then present several devices that use an LED as a generic wireless serial data port. An important implication of this work is that every LED connected to a microprocessor can be thought of as a wireless two-way communication port. We present this technology as a solution to the “last centimeter problem”, because it permits disparate devices to communicate with each other simply and cheaply with minimal design modification.
William S Yerazunis - One of the best experts on this subject based on the ideXlab platform.
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very low cost sensing and communication using bidirectional leds
Ubiquitous Computing, 2003Co-Authors: Paul Henry Dietz, William S Yerazunis, Darren LeighAbstract:A novel microprocessor interface circuit is described which can alternately emit and detect light using only an LED, two digital I/O pins and a single Current Limiting Resistor. This technique is first applied to create a smart illumination system that uses a single LED as both light source and sensor. We then present several devices that use an LED as a generic wireless serial data port. An important implication of this work is that every LED connected to a microprocessor can be thought of as a wireless two-way communication port. We present this technology as a solution to the “last centimeter problem”, because it permits disparate devices to communicate with each other simply and cheaply with minimal design modification.
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1. Version submitted to Ubicomp 2003. Very Low-Cost Sensing and Communication Using Bidirectional LEDs
2003Co-Authors: William S Yerazunis, Darren Leigh, Paul DietzAbstract:A novel microprocessor interface circuit is described which can alternately emit and detect light using only an LED, two digital I/O pins and a single Current Limiting Resistor. This technique is first applied to create a smart illumination system that uses a single LED as both light source and sensor. We then present several devices that use an LED as a generic wireless serial data port. An important implication of this work is that every LED connected to a microprocessor can be thought of as a wireless two-way communication port. We present this technology as a solution to the “last centimeter problem”, because it permits disparate devices to communicate with each other simply and cheaply with minimal design modification
A. V. Makogon - One of the best experts on this subject based on the ideXlab platform.
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THE MICRO- AND NANOSECOND DISCHARGES IN GAS BUBBLES FOR WATER DISINFECTION AND PURIFICATION
'National Technical University Kharkiv Polytechnic Institute', 2019Co-Authors: N. I. Boyko, A. V. MakogonAbstract:Purpose. Comparison of electrical circuits of experimental plants for obtaining micro- and nanosecond discharges in gas bubbles in water and comparing the experimental results obtained for disinfecting water using such discharges. Methodology. To obtain high-voltage pulses on the load in the form of a gas bubbles and a layer of water with a frequency of more than 2000 pulses per second, a method of generating micro- and nanosecond pulses using high-voltage pulse generators based on a pulse transformer (PT) according to Tesla, with a transistor opening switch IGBT in the low-voltage part of the circui . A Current-Limiting Resistor with a resistance Rcl = 24 kW is used to protect the transistor switch at microsecond discharges. At nanosecond discharges, a multi-gap spark gap is used to sharpen the front of high-voltage pulses. We used a capacitive voltage divider with a division factor of Kd = 7653 to measure voltage pulses, a shunt with a resistance of Rs = 2.5 W for measuring Current pulses. RIGOL DS1102E digital oscilloscope with a 100 MHz bandwidth was used as a recording device. Results. The effect of micro- and nanosecond discharges in gas bubbles on microorganisms was experimentally investigated. It was possible to reduce the biochemical oxygen consumption of water during microsecond discharges, reduce the turbidity of water, and improve its organoleptic qualities. The energy released in a single pulse with microsecond discharges Wµ ≈ 17 mJ, with nanosecond discharges Wn ≈ 7.95 mJ. At nanosecond discharges, complete inactivation of E.coli bacteria was achieved. The disinfecting and purifying action of nanosecond pulses is better compared to microsecond pulses due to an increase in the amplitude of the pulsed voltage up to 30 kV, and a pulsed Current of up to 35 A. Originality. The possibility of effective microbiological disinfection of water using nanosecond discharges in gas bubbles at low specific energy consumption has been experimentally shown. Practical value. The obtained experimental results on water disinfection using micro- and nanosecond discharges offer the prospect of industrial application of installations using such discharges for disinfecting and purification wastewater, swimming pools, and post-treatment of tap water
Макогон, Артём Витальевич - One of the best experts on this subject based on the ideXlab platform.
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The micro- and nanosecond discharges in gas bubbles for water disinfection and purification
Национальный технический университет "Харьковский политехнический институт", 2019Co-Authors: Бойко, Николай Иванович, Макогон, Артём ВитальевичAbstract:Цель. Сравнение электрических схем экспериментальных установок для получения микро- и наносекундных разрядов вгазовых пузырях в воде и сравнение полученных экспериментальных результатов обеззараживания воды при помощи таких разрядов. Методика. Для получения высоковольтных импульсов на нагрузке в виде пузырьков газа и слоя воды с частотой более 2000 импульсов в секунду предложен способ генерации микро- и наносекундных импульсов с использованием генераторов импульсов высокого напряжения на основе импульсного трансформатора по схеме Тесла с транзисторным размыкающим переключателемIGBT в низковольтной части цепи. Токоограничивающий резистор с со-противлениемRcl= 24 кОм используется для защиты транзисторного переключателя при микросекундных разрядах. При наносекундных разрядах многозазорный искровой разрядник используется для обострения фронта импульсов высокого напряжения. Мы использовали емкостный делитель напряжения с коэффициентом деленияKd= 7653 для измерения импульсов напряжения, шунт с сопротивлениемRs= 2,5 Ом– для измерения импульсов тока. В качестве записывающего устройства использовался цифровой осциллографRIGOL DS1102E с полосой пропускания 100 МГц. Результаты. Экспериментально исследовано влияние микро- и наносекундных разрядов в газовых пузырях на микроорганизмы. Удалось уменьшить биохимическое потребление кислорода воды при микросекундных разрядах, снизить мутность воды, улучшить органолептические показатели. Энергия, выделяемая в одном импульсе при микросекундных разрядах, составляетWμ ≈17 мДж, а при наносекундных разрядах– Wn ≈7,95 мДж. При наносекундных разрядах достигнута полная инактивация бактерийE.coli. Обеззараживающее и очищающее действие наносекундных импульсов лучше по сравнению с микросекундными импульсами из-за увеличения амплитуды импульсного напряжения до 30 кВ, а импульсного тока до 35 А. Научная новизна. Экспериментально показана возможность эффективного микробиологического обеззараживания воды при помощи наносекундных разрядов в газовых пузырях при малых удельных затратах энергии. Практическая значимость. Полученные экспериментальные результаты по обеззараживанию воды при по-мощи микро- и наносекундных разрядов открывают перспективу промышленного применения установок с использованием таких разрядов для обеззараживания и очистки сточных вод, бассейнов и доочистки водопроводной воды.Purpose. Comparison of electrical circuits of experimental plants for obtaining micro- and nanosecond discharges in gas bubbles in water and comparing the experimental results ob-tained for disinfecting water using such discharges. Methodology. To obtain high-voltage pulses on the load in the form of a gas bubbles and a layer of water with a frequency of more than 2000 pulses per second, a method of generating micro- and nanosecond pulses using high-voltage pulse generators based on a pulse transformer (PT) according to Tesla, with a transis-tor opening switch IGBT in the low-voltage part of the circui . A Current-Limiting Resistor with a resistance Rcl= 24k is used to protect the transistor switch at microsecond discharges. At nanosecond discharges, a multigap spark gap is used to sharp-en the front of high-voltage pulses.We used a capacitive voltage divider with a division factor of Kd= 7653 to measure voltagе pulses, a shunt with a resistance of Rs= 2.5 for measuring cur-rent pulses. RIGOL DS1102E digital oscilloscope with a 100 MHz bandwidth was used as a recording device. Results. The effect of micro- and nanosecond discharges in gas bubbles on microor-ganisms was experimentally investigated. It was possible to reduce the biochemical oxygen consumption of water during microsecond discharges, reduce the turbidity of water, and im-prove its organoleptic qualities. The energy released in a single pulse with microsecond discharges Wµ ≈17 mJ, with nanosecond discharges Wn≈7.95 mJ. At nanosecond discharges, com-plete inactivation of E.coli bacteria was achieved. The disinfect-ing and purifying action of nanosecond pulses is better com-pared to microsecond pulses due toan increase in the amplitude of the pulsed voltage up to 30 kV, and a pulsed Current of up to 35 A. Originality. The possibility of effective microbiological disinfection of water using nanosecond discharges in gas bub-bles at low specific energy consumption has been experimentally shown.Practical value. The obtained experimental results on water disinfection using micro- and nanosecond discharges offer the prospect of industrial application of installations using such discharges for disinfecting and purification wastewater, swimming pools, and post-treatment of tap water
