Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-04-11T19:34:25Z No. of bitstreams: 1 JulianaElionaraBezerraCosta_TESE.pdf: 2543108 bytes, checksum: 556e8d7316f4202efa7113ded946013c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-04-12T22:40:15Z (GMT) No. of bitstreams: 1 JulianaElionaraBezerraCosta_TESE.pdf: 2543108 bytes, checksum: 556e8d7316f4202efa7113ded946013c (MD5) / Made available in DSpace on 2018-04-12T22:40:16Z (GMT). No. of bitstreams: 1 JulianaElionaraBezerraCosta_TESE.pdf: 2543108 bytes, checksum: 556e8d7316f4202efa7113ded946013c (MD5) Previous issue date: 2017-12-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Alguns res?duos, provenientes das mais variadas atividades, podem ser reaproveitados, diminuindo o efeito dos impactos ambientais ocasionados pela m? disposi??o dos mesmos no meio ambiente. Os res?duos classificados com biomassa lignocelul?sica, podem ser convertidos em produtos qu?micos e combust?veis a partir da pir?lise r?pida convencional, gerando como produto principal o bio-?leo com caracter?sticas diretamente ligadas as caracter?sticas da biomassa de origem que podem ser melhoradas a partir do uso de catalisadores. Neste trabalho foram sintetizados catalisadores do tipo ZSM-5 e HZSM-5, utilizando res?duos de p? de granito, p? de vidro, diatomita e cinza da casca do arroz como fontes alternativas e tamb?m um catalisador utilizando fonte convencional de S?lica e Alum?nio. O objetivo da s?ntese desses materiais ? utiliz?-los como catalisador na pir?lise da fibra do coco visando a obten??o de produtos com maior valor agregado, reduzindo a produ??o de compostos oxigenados. A biomassa utilizada foi caracterizada por an?lise imediata, densidade, an?lise elementar, Teor de Celulose, hemicelulose e lignina, Poder calor?fico, TG/DTG, DRX, FT-IR e FRX afim de analisar o potencial energ?tico da mesma. Os precursores de S?lica e Alum?nio foram submetidos a an?lises de FRX, DRX, e os catalisadores foram caracterizados por TG/DTG, DRX, FT-IR, MEV e BET. Nos resultados de pir?lise convencional da fibra do coco observou a grande produ??o de produtos oxigenados, a maior parte deles fen?is e nos resultados das pir?lise catal?tica foi poss?vel observar a diminui??o desses produtos, provando a efici?ncia dos catalisadores utilizados. / Some waste, from the most varied activities, can be reused, reducing the effect of these impacts, usually caused by poor disposal in the environment. The residues classified with lignocellulosic biomass can be converted into chemical products and fuels from the conventional fast pyrolysis, generating as main product the bio-oil. This generally presents some undesirable characteristics directly linked to the characteristics of the source biomass, which decrease its energy efficiency. The use of catalysts allows the reduction of these undesirable products and improves the final quality of the bio oil. As a result, ZSM-5 and HZSM-5 catalysts were synthesized using granite powder, glass powder, diatomite and rice husk ash as alternative sources of silica and aluminum; was also synthesized using a conventional silica and aluminum source, serving as a standard for the others. . The objective of the synthesis of these materials is to use them as a catalyst in the pyrolysis of coconut fiber in order to obtain products with higher added value, reducing the production of oxygenated compounds. The biomass used was characterized by immediate analysis, density, elemental analysis, cellulose content, hemicellulose and lignin, calorific power, TG / DTG, XRD, FT-IR and FRX in order to analyze the energy potential of the same. Silica and Aluminum precursors were subjected to FRX, XRD analyzes, and the catalysts were characterized by TG / DTG, DRX, FT-IR, MEV and BET. In the results of conventional pyrolysis of the coconut fiber, it was observed the great production of oxygenated products, most of them phenols and in the results of the catalytic pyrolysis it was possible to observe the decrease of these products, proving the efficiency of the catalysts used.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-10T12:38:21Z No. of bitstreams: 1 BrunaMariaEmerencianoDasChagas_TESE.pdf: 6590840 bytes, checksum: f29703c72f7b97886bfe14570fa8d656 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-11T13:13:01Z (GMT) No. of bitstreams: 1 BrunaMariaEmerencianoDasChagas_TESE.pdf: 6590840 bytes, checksum: f29703c72f7b97886bfe14570fa8d656 (MD5) / Made available in DSpace on 2017-01-11T13:13:01Z (GMT). No. of bitstreams: 1 BrunaMariaEmerencianoDasChagas_TESE.pdf: 6590840 bytes, checksum: f29703c72f7b97886bfe14570fa8d656 (MD5) Previous issue date: 2016-06-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Recentemente as microalgas e cianobact?rias vem sendo muito estudadas como fonte de biocombust?veis devido a sua elevada produtividade, elevado teor de ?leo e capacidade de crescer em uma grande variedade de climas e terras sem competir com a produ??o de alimentos. A pir?lise ? um m?todo de convers?o termoqu?mica eficaz capaz de converter biomassa em bio-?leo, carv?o e gases combust?veis. O bio-?leo ? uma mistura l?quida de compostos org?nicos potencial para substituir o ?leo diesel. Tem sido demosntrado que bio-?leos de microalgas e cianobact?rias s?o mais est?veis, apresentam teor de oxig?nio mais baixo e poder calor?fico mais alto que bio-?leos de biomassa lignocelul?sica, embora contenha um alto teor de nitrog?nio devido a presen?a de prote?nas na mat?ria-prima. A Spirulina ? uma cianobact?ria que vem sendo muito estudada nos processos de degrada??o t?rmica por apresentar alto teor de prote?nas (74%) e baixo teor de lip?dios (< 1%) podendo ser totalmente convertida em biocombust?vel. Nesta tese, foi investigado o potencial de produ??o de combust?veis e qu?micos a partir da pir?lise r?pida de Spirulina. Os experimentos de pir?lise r?pida convencional em Py-GC/MS foram conduzidos para investigar a influ?ncia dos par?metros de pir?lise, tais como temperatura, taxa de aquecimento e tempo de resid?ncia nos rendimentos dos produtos. O rendimento dos produtos da pir?lise foi maximizado a 450 ?C e 30 s, independente da taxa de aquecimento. Essas condi??es foram escolhidas para o estudo da pir?lise catal?tica com 9 ze?litas diferentes para avaliar a produ??o de hidrocarbonetos espec?ficos, compostos oxigenados e nitrogenados em func?o da raz?o biomassa/catalisador. O rendimento de hidrocarbonetos arom?ticos aumentou ? medida que a propor??o de catalisador/biomassa aumentou de 1:1 para 10:1. A ze?lita H-ZSM5 (23) apresentou o rendimento m?ximo de hidrocarbonetos e a maior redu??o de f?nois quando comparada as outras ze?litas, por?m os compostos nitrogenados totais n?o foram significativamente reduzidos por nenhum catalisador testado. Posteriormente testes de pir?lise r?pida de Spirulina foram conduzidos em um reator de leito fluidizado da USDA-ARS sob diferentes atmosferas de rea??o. Foram testadas a pir?lise convencional com atmosfera inerte (N2) e um processo de pir?lise com atmosfera reativa compostas por gases reciclados da pi?lise, denominado ?Tail Gas Reactive Pyrolysis? (TGRP). O bio-?leo, carv?o e gases produzidos pelo processo TGRP tiveram suas caracter?sticas melhoradas em rela??o aos produtos obtidos na pir?lise convencional, houve um aumento na concentra??o dos hidrocarbonetos arom?ticos e predominaram compostos nitrogenados com um ?nico ?tomo de nitrog?nio (piridinas, pirroles, indoles, nitrilas e amidas). Devido a esta composi??o, esse bio-?leo apresentou um n?vel suficientemente elevado de estabilidade t?rmica para ser destilado. Al?m disso, o bio-?leo produzido pelo processo TGRP foi mais est?vel, menos ?cido e apresentou um poder calor?fico mais alto que bio-?leos de biomassa lignocelul?sica. / Recently microalgae and cyanobacteria have been widely studied as a source of biofuels due to its high yield, high oil content and ability to grow on a wide variety of climates and land without competing with food production. Pyrolysis is an effective thermochemical conversion method capable of converting biomass to fuels, including bio-oil, bio-char and gas. Bio-oil is a liquid mixture of organic compounds that can be a source of valuable chemicals and potential to replace diesel oil depending on its quality. It has been shown that bio-oil from microalgae and other proteinaceous biomass are more stable, have a low oxygen content and higher calorific value than those produced from lignocellulosic feedstock, though contains high nitrogen content due to the presence of protein in its constitution. Spirulina is a cyanobacteria that has been studied in the thermal degradation processes due to its high protein and low lipids content. In this thesis, we investigated the potential for production of fuels and chemicals from the fast pyrolysis of Spirulina. Conventional fast pyrolysis experiments in Py-GC/MS were performed to investigate the influence of pyrolysis parameters such as temperature, heating rate and residence time in distribution of products. The pyrolysis yield was maximized at 450 ?C and 30 s, regardless of heating rate. H-ZSM5 (23) showed the maximum hydrocarbon yield and the largest phenols reduction when compared to the other zeolites, but the total nitrogenated compounds were not significantly reduced by any catalyst tested although some specific nitrogenous have been reduced or eliminated. H-? (38) was also able to increase aromatics production, although its effect was less significant when compared to H-ZSM5 (23) and (50). Subsequently tests of Spirulina fast pyrolysis were conducted in USDA?s bubbling fluidized bed pyrolysis reactor under different reaction atmospheres. Conventional (N2 atmosphere) and reactive (Tail Gas Reactive Pyrolysis - TGRP) pyrolysis were tested. Biooil, bio-char and gas obtained from TGRP process had their fuel characteristics improved when compared to the products from conventional pyrolysis. TGRP Spirulina pyrolysis oil showed an increased concentration of aromatics hydrocarbon and the presence of nitrogenous compounds with single nitrogen atom (pyridines, pyrroles, indoles, nitriles and amides), low oxygen content and low acidity being thermally stable therefore a good feedstock for distillation process. Distillation successfully allowed concentrating various chemicals into distillate fractions which, in turn, could be individually isolated for processing to fuels or chemical co-products.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-09T19:37:11Z No. of bitstreams: 1 MarcioBarbalhoDantasBezerra_TESE.pdf: 8185378 bytes, checksum: f592c32011f79a35178d9637d6c7a7cc (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-13T18:39:59Z (GMT) No. of bitstreams: 1 MarcioBarbalhoDantasBezerra_TESE.pdf: 8185378 bytes, checksum: f592c32011f79a35178d9637d6c7a7cc (MD5) / Made available in DSpace on 2017-03-13T18:39:59Z (GMT). No. of bitstreams: 1 MarcioBarbalhoDantasBezerra_TESE.pdf: 8185378 bytes, checksum: f592c32011f79a35178d9637d6c7a7cc (MD5) Previous issue date: 2016-12-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Nos ?ltimos anos, devido ao esgotamento progressivo dos combust?veis f?sseis convencionais, fontes de energia renov?veis tem desempenhado papel importante na matriz energ?tica. Dentre tais fontes, a biomassa lignocelul?sica aparece como uma op??o vi?vel, dispon?vel e de relativamente f?cil cultivo, sem competir com a produ??o de alimentos. A pir?lise r?pida destaca-se como rota de transforma??o de biomassa em produtos de diferentes fases (gases, bio-?leo, carv?o e condensado pirol?tico) com aplica??es diversas. Neste trabalho, bio-?leo foi produzido a partir do capim-elefante (Pennisetum Purpureum Schumach) em reatores de leito fluidizado com capacidades de 1,5 e 40 kg/h, sob diferentes atmosferas (ar, N2 e gases de reciclo da pir?lise), na temperatura de 500?C. No leito de 1,5 kg/h, conduziu-se a pir?lise sem e com a presen?a do catalisador HZSM-5, ambas sob N2. A pir?lise sem catalisador tamb?m foi realizada com reciclo (54, 74 e 85%) dos gases. No leito de 40 kg/h, conduziu-se a pir?lise sob atmosfera oxidativa moderada de ar (71% N2 e 21% O2) variando-se as configura??es da coluna de lavagem dos gases (sem trocador de calor, com trocador simples, com trocador multi-passe) e da recircula??o de condensado (produtos leves) produto da rea??o de pir?lise. Por fim, os bio-?leos obtidos dos experimentos com reciclo dos gases no leito de 1,5 kg/h foram submetidos ? desoxigena??o em leito de lama em 5%Pt/C. Os resultados mostraram que o reciclo dos gases ocasionou um aumento no teor de carbono de 53,96% (na pir?lise sem reciclo) para 70,89% (na pir?lise com 74% de reciclo) e para 77,16% (na pir?lise com a HZMS-5 in situ). O teor de oxig?nio diminuiu de 39,64% para 21,76%. O poder calor?fico superior (PCS) aumentou de 26,1 para 33,11 MJ/kg. Balan?os de massa mostraram que 5,4 a 6,15% da biomassa foi convertida em CH4, C2H4, C2H6 e C3H8 na pir?lise com reciclo dos gases. Todas as amostras de bio-?leos obtidas foram ricas em fen?is, com destaque para aquelas obtidas na atmosfera oxidativa. Os demais componentes e grupos funcionais majorit?rios no bio-?leo foram ?cido ac?tico, acetol, a??cares e cetonas. Baseado nos dados da din?mica da massa da biomassa no tempo um modelo cin?tico (biomassa produzindo bio-?leo + condensado, carv?o e gases) foi proposto e as equa??es diferenciais ordin?rias foram implementadas na linguagem FORTRAN com o objetivo de estimar constantes cin?ticas de velocidade da rea??o.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-10-18T20:27:50Z No. of bitstreams: 1 ClaudioRomeroRodriguesDeAlmeida_TESE.pdf: 4016081 bytes, checksum: 8802f01fbd11ecff20ac4e720e49e628 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-10-23T19:53:44Z (GMT) No. of bitstreams: 1 ClaudioRomeroRodriguesDeAlmeida_TESE.pdf: 4016081 bytes, checksum: 8802f01fbd11ecff20ac4e720e49e628 (MD5) / Made available in DSpace on 2017-10-23T19:53:45Z (GMT). No. of bitstreams: 1 ClaudioRomeroRodriguesDeAlmeida_TESE.pdf: 4016081 bytes, checksum: 8802f01fbd11ecff20ac4e720e49e628 (MD5) Previous issue date: 2017-08-31 / Os materiais que pertencem a fam?lia dos molibdatos com estrutura cristalina tipo scheelita t?m sido objeto de pesquisas ao longo do tempo. O amplo interesse nestes compostos reside em suas excelentes propriedades ?pticas, que formam a base de sua utiliza??o como subst?ncias fosforescentes, materiais para lasers, e detectores de cintila??o entre outros. A t?cnica de spray pir?lise ultrass?nica, por sua vez, ? uma t?cnica de produ??o cont?nua de p?s, de apenas uma etapa, de f?cil controle dos par?metros e apesar de ser uma metodologia amplamente utilizada, n?o h? refer?ncias de seu uso para a produ??o de molibdatos de c?lcio puro e com dopagem de terras raras. Neste trabalho foi estudado a obten??o de part?culas de molibdato de c?lcio (CaMoO4) puro, dopado com diferentes porcentagens em mol de 1%, 2% e 4% das terras raras Eu+3, Tb+3, Tm+3, e a mistura das tr?s terras raras (TR) a partir da t?cnica de spray pir?lise ultrass?nico (SPU). O tempo de perman?ncia dentro do reator de fluxo laminar, foi de 27 segundos Os materiais obtidos foram caracterizados pelas t?cnicas de difra??o de raios-X, espectroscopia de micro Raman, espectroscopia ?tica nas regi?es do ultravioleta-vis?vel, microscopia eletr?nica de varredura com canh?o de el?trons por emiss?o de campo e espectroscopia de fotoluminesc?ncia e coordenadas de cor do CaMoO4 com TR. Os resultados indicaram que a t?cnica de spray pir?lise ultrass?nico produziu material de alta pureza, nas dimens?es nano e micro, com morfologia esf?rica. Com a adi??o das terras raras com diferentes porcentagens em mol de 1%, 2% e 4% e sua TR na estrutura do CaMoO4, foi poss?vel observar as emiss?es de fotoluminesc?ncia caracter?sticas das terras raras e a obten??o de materiais com emiss?es no branco para as amostras de CaMoO4 com 2% e 4% da TR. / The materials belonging to the molybdates family with crystalline structure type scheelite have been object of research over time. The wide interest in these compounds lies in their excellent optical properties, which form the basis of their use as phosphors, materials for lasers, and scintillation detectors among others. The ultrasonic pyrolysis spray technique is a technique of continuous production of single-step powders, easy to control parameters and although it is a widely used methodology, there are no references of its use for the production of calcium molybdates and with rare earth doping. In this study, the preparation of pure calcium molybdate (CaMoO4) particles with different mole percentages of 1%, 2% and 4% of the rare earths Eu+3, Tb+ 3 , Tm+ 3, and their respective mixtures (TR) were studied from the ultrasonic pyrolysis spray technique. The residence time inside the laminar flow reactor was 27 seconds. The materials obtained were characterized by X-ray diffraction techniques, micro Raman spectroscopy, ultraviolet-visible optical spectroscopy, scanning electron microscopy with field emission electron gun and photoluminescence spectroscopy. The results shown that the ultrasonic pyrolysis spray technique produced high purity material in the nano and micro dimensions with spherical morphology. With the addition of rare earths with different percentages of 1%, 2% and 4% mol and their mixture in the structure of CaMoO4, it was possible to observe the photoluminescence emissions characteristic of rare earths and to obtain materials with white emissions for the samples of CaMoO4 with 2% and 4% TR.

Submitted by Miriam Lucas (miriam.lucas@unioeste.br) on 2017-09-04T12:26:27Z No. of bitstreams: 2 Jessica_Marques_Binotto_2017.pdf: 1667873 bytes, checksum: 89571fc7403750511f5f83d3058f98ae (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-09-04T12:26:27Z (GMT). No. of bitstreams: 2 Jessica_Marques_Binotto_2017.pdf: 1667873 bytes, checksum: 89571fc7403750511f5f83d3058f98ae (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-03-24 / Fundação Parque Tecnológico de Itaipu - FPTI / The use of organic waste to generate electricity in a distributed way is an alternative that needs to be carefully evaluated due to the various advantages related to this process. Specifically, intensive livestock farming is an activity that results in high generation of waste with high pollutant power, whose treatment is mandatory by law and, if carried out through the controlled anaerobic process, generates biogas. Due to its high calorific value, biogas can be used as a primary source for the generation of electric energy, which requires the joint evaluation of environmental, social, political and economic benefits. The Integrated Resource Planning (IRP) appears as an adequate tool to carry out such an evaluation, considering all the bonuses and onuses involved. In this sense, this work analyzes the use of biogas as a primary source for generation of electric power in a rural property located in the western region of the state of Paraná, under the IRP perspective. For the economic evaluation, a mathematical model was developed, considering the VaR (Value at Risk) as a measure of the risk to which the investor is subject due to the uncertainty of the demand and the production of biogas. The simulations were performed using a hypothetical rural property considering a VaR with a confidence level of 95%. The developed model, together with the evaluation criteria proposed by the IRP, was an adequate tool to point out the benefits of using biogas as an energy resource. / A utilização de resíduos orgânicos para geração de energia elétrica de maneira distribuída é uma alternativa que precisa ser cuidadosamente avaliada, devido às várias vantagens relacionadas a esse processo. Especificamente, a pecuária intensiva é uma atividade que resulta em grande geração de resíduos com elevado poder poluidor, sendo seu tratamento obrigatório por lei, o qual, se realizado por meio do processo anaeróbico controlado, gera biogás. Devido ao seu elevado poder calorífico, o biogás pode ser utilizado como fonte primária para a geração de energia elétrica, sendo necessária a avaliação de forma conjunta dos benefícios ambientais, sociais, políticos e econômicos. O Planejamento Integrado de Recursos (PIR) surge como uma ferramenta adequada para realizar tal avaliação, considerando todos os bônus e ônus envolvidos. Nesse sentido, este trabalho analisa a utilização de biogás como fonte primária para a geração de energia elétrica em uma propriedade rural localizada na região oeste do estado do Paraná, sob a ótica do PIR. Para a avaliação econômica, um modelo matemático foi desenvolvido, considerando o VaR (Value at Risk) como medida do risco ao qual o investidor está sujeito, devido à incerteza da demanda e da produção de biogás. As simulações foram realizadas utilizando, como caso de estudo, uma propriedade rural hipotética, considerando o VaR com um nível de confiança de 95%. O modelo desenvolvido, aliado aos critérios de valoração propostos pelo PIR, mostrou-se como ferramenta adequada para apontar os benefícios da utilização do biogás como recurso energético.

Energy storage with the help of different materials is something that has been around for a long time. Structures such as concrete or brick use their high thermal mass to store energy in the form of temperature increase, sensible heat, of the respective material. Energy storage in the form of sensible heat is relatively small in capacity, which means that large masses of building material are required to give a significant effect. Concrete, for example, requires 4 kJ/kg to increase in temperature by 1 °C. Now society has begun to look more closely at other materials that can be used for energy storage and temperature stabilization in buildings. Phase change materials are unique materials that use the change in phases between different aggregation states to store energy in the form of latent heat. It is mainly phase change between solid and liquid that is used since gaseous form would involve large volume changes. An everyday example of a material that undergoes a phase change is water. Water requires 334 kJ/kg to go from 0 ˚C ice (solid) to 0 ˚C water (liquid).  Water is a very powerful phase change material but cannot be used in buildings as it melts at 0 ˚C. Therefore, other materials have been developed to meet the requirement that the melting take place at the desired temperature, usually room temperature. The different phase change materials can be divided into three different groups: organic, inorganic and eutetic materials. All groups come with their own advantages and disadvantages. Organic materials are stable materials in the sense that they can phase change in repeated cycles which makes them the popular choice when it comes to buildings. One disadvantage that most organic materials possess is that they are flammable. The choice of phase change material will affect the quality of the building and it is therefore important that the knowledge about these materials is adopted before they become more widespread.

Diploma thesis deals with home security system using Raspberry Pi as a central microcontroller unit and it´s additional peripherals. Informations are accessible via web server.

Diploma thesis deals with home security system using Raspberry Pi as a central microcontroller unit and it´s additional peripherals. Informations are accessible via web server.

With the change in political and economic situations, increased urbanization and the growing population in China leads to extended housing needs, which results in various problems for the real estate market, such as the pronounced rise of housing price and unreasonable housing supply system. At present, the major issue that the government is facing with is how to improve the housing availability and provide space to the urban residents to solve the problem that many urban residents are unable to afford housing. In order to fully understand the housing market in Beijing city, this paper adopted quantitative methods of Housing Price to Income Ratio, Residual Income, and the Housing Affordability Index to examine the housing affordability of Beijing urban residents from 2004 to 2013, based upon the data collected from Beijing Statistic Yearbook mostly. The analysis revealed that there is a declining trend of housing affordability in Beijing and the gap between residential housing prices and urban households’ incomes and the difference between the poor and the rich is obvious.

This thesis deals with the question of electronic security systems. In the forepart are described electronic security system components such as keyboards, detectors, alarm devices etc. Various methods of security or de-security of properties, trespassing and other events detection methods, and ways of alarm calling are described there too. The next part of the master’s thesis focuses on the construction of an alarm system which is designed for security of a common-size flat with one entry. The system manages to control up to four movement detectors. The operation of the system is handled by a 16 button keyboard, and easy orientation is provided thanks to a liquid crystal display. The alarm is signaled by an indoor alert siren, however, other alarm announcing devices with an input matched for the log. 0 or log. 1 reception can be connected too. The system contains communication equipment (mobile phone) which signals alarm at a distance to the three telephone numbers. User can use a distance control by text message to unlock system or to determine its status. The system is controlled by the microcontroller AVR ATmega16, the product of Atmel company. A brief description of all components of the electronic alarm system is included in this work.