555 Timer

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Oladotun Owolabi - One of the best experts on this subject based on the ideXlab platform.

  • Available Online at www.ijecse.org ISSN- 2277-1956 Development of a Secured Security System for an Automobile using GSM Technology and Electronic Circuit
    2013
    Co-Authors: Segun O. Olatinwo, Kola Ayanlowo, O. Shoewu, Tobi Samuel Fadiji, Olasunmbo O. Ajani, Oladotun Owolabi
    Abstract:

    Abstract- This paper focuses on the design and development of a security system for an automobile using GSM technology and electronic circuit which is being used to prevent or control the theft of a vehicle. The case of car hijacking has become so rampant that it has become a threat to the world leaders. Some of them cannot drive their expensive cars without escort plus the sounding of siren to scare the evil perpetrators. The necessity of car security cannot be overemphasized by car owners due to high cost of purchasing car nowadays. Car security system using GSM and Electronic circuit had been designed, which can operate in two ways: receiving signal / command from the car owner through the mobile phone or by taken decision by itself using electronic circuit. The signal received through the mobile phone that serves as input to the circuit and immediately sends signal through transistor TR 1 and TR 2 to the 555 Timer IC 1 to other transistors in the circuit and output of one transistor serves as input signal to another. The output signal from the PIC 16F84A or CD 4017 demobilized the central lock system and brain box of the car. The demobilized central lock system and brain box can be reset by calling or sending another signal through the mobile phone to reset the brain box

  • Development of a Secured Security System for an Automobile using GSM Technology and Electronic Circuit
    Buldanshahr : IJECSE, 2013
    Co-Authors: Segun O. Olatinwo, Kola Ayanlowo, O. Shoewu, Tobi Samuel Fadiji, Olasunmbo O. Ajani, Oladotun Owolabi
    Abstract:

    This paper focuses on the design and development of a security system for an automobile using GSM technology and electronic circuit which is being used to prevent or control the theft of a vehicle. The case of car hijacking has become so rampant that it has become a threat to the world leaders. Some of them cannot drive their expensive cars without escort plus the sounding of siren to scare the evil perpetrators. The necessity of car security cannot be overemphasized by car owners due to high cost of purchasing car nowadays. Car security system using GSM and Electronic circuit had been designed, which can operate in two ways: receiving signal / command from the car owner through the mobile phone or by taken decision by itself using electronic circuit. The signal received through the mobile phone that serves as input to the circuit and immediately sends signal through transistor TR1 and TR2 to the 555 Timer IC1 to other transistors in the circuit and output of one transistor serves as input signal to another. The output signal from the PIC 16F84A or CD 4017 demobilized the central lock system and brain box of the car. The demobilized central lock system and brain box can be reset by calling or sending another signal through the mobile phone to reset the brain box

Sugata Munshi - One of the best experts on this subject based on the ideXlab platform.

  • Optimized Thermocouple Temperature Sensor using 555 Timer and ANN Based Linearization
    2020 IEEE Calcutta Conference (CALCON), 2020
    Co-Authors: Debarpan Bhattacharya, Pranabendra Prasad Chandra, Biswajit Bhattacharyya, Sugata Munshi
    Abstract:

    The presented work reports a low-cost, two-stage linearization scheme for thermocouple based temperature sensing. The first stage involves IC555 based astable multivibrator. An NTC thermistor is employed as a discharging resistor of multivibrator to facilitate reference junction compensation as well as the measurement of ambient temperature. The second stage of linearization employs ANN based fitting between the output of IC555 and true temperature. The linearization scheme uses a trade-off between the fast response of IC555 based arrangement and exorbitant accuracy of ANN-based arrangement, to optimize the performance of the sensor. The PSpice based simulation study is carried out with a T-type thermocouple for temperature range of 80°C to 125°C while the ambient temperature varies from 25°C up to 40°C. It offers absolute maximum full-scale error of 0.13%, as little as in the best existing literature, with a reduced computational burden upon the processing unit. Keywords—ANN, As table Multivibrator, IC555, Linearization, Temperature sensor.

  • A Combination of Astable Multivibrator and Microcontroller for Thermistor-Based Temperature Measurement Over Internet
    IEEE Sensors Journal, 2019
    Co-Authors: Nabanita Chatterjee, Biswajit Bhattacharyya, Debangshu Dey, Sugata Munshi
    Abstract:

    The paper reports the development of a cost-effective Negative Temperature Coefficient thermistor-based temperature transducer for embedded systems and for the Internet of Things applications. The venture uses a 555 Timer-based astable multivibrator as a first-stage linearizer in which the thermistor and a linearizing resistance in series with it modulate the threshold voltages of the internal comparators of the integrated circuit. The output is further processed by a microcontroller which performs a second stage linearization with the help of a look-up table coupled with linear interpolation. Furthermore, the microcontroller uses an Ethernet shield to transmit the temperature information to remote locations. The performance of the proposed setup has been examined for three different thermistors, over 30 °C to 120 °C. The measurement strategy has been found to outperform the competing arrangements reported in recent times, with regard to the measurement accuracy, linearity of transfer, compactness, cost, reliability, and immunity to drift.

  • SIMULATION STUDIES ON A NEW INTELLIGENT SCHEME FOR RELATIVE HUMIDITY AND TEMPERATURE MEASUREMENT USING THERMISTORS IN 555 Timer CIRCUIT
    2014
    Co-Authors: Debangshu Dey, Sugata Munshi
    Abstract:

    This paper presents a novel and cheap electronic version of wet and dry temperature hygrometer The instrument is centered around a 555 Timer, operated in astable multivibrator mode. Two thermistors with negative temperature coefficients (NTC) serve as the two timing resistors of the multivibrator. These thermistors are used to sense the dry and wet temperatures. The durations of the ‘HIGH ’ and ‘LOW ’ levels of the multivibrator output are detected and these values are used to predict the relative humidity and ambient temperature by an appropriately trained Artificial Neural Network (ANN). The performance of the arrangement has been evaluated by numerical simulation studies using thermistor data from manufacturer’s table. Significantly good results have been obtained

Segun O. Olatinwo - One of the best experts on this subject based on the ideXlab platform.

  • Available Online at www.ijecse.org ISSN- 2277-1956 Development of a Secured Security System for an Automobile using GSM Technology and Electronic Circuit
    2013
    Co-Authors: Segun O. Olatinwo, Kola Ayanlowo, O. Shoewu, Tobi Samuel Fadiji, Olasunmbo O. Ajani, Oladotun Owolabi
    Abstract:

    Abstract- This paper focuses on the design and development of a security system for an automobile using GSM technology and electronic circuit which is being used to prevent or control the theft of a vehicle. The case of car hijacking has become so rampant that it has become a threat to the world leaders. Some of them cannot drive their expensive cars without escort plus the sounding of siren to scare the evil perpetrators. The necessity of car security cannot be overemphasized by car owners due to high cost of purchasing car nowadays. Car security system using GSM and Electronic circuit had been designed, which can operate in two ways: receiving signal / command from the car owner through the mobile phone or by taken decision by itself using electronic circuit. The signal received through the mobile phone that serves as input to the circuit and immediately sends signal through transistor TR 1 and TR 2 to the 555 Timer IC 1 to other transistors in the circuit and output of one transistor serves as input signal to another. The output signal from the PIC 16F84A or CD 4017 demobilized the central lock system and brain box of the car. The demobilized central lock system and brain box can be reset by calling or sending another signal through the mobile phone to reset the brain box

  • Development of a Secured Security System for an Automobile using GSM Technology and Electronic Circuit
    Buldanshahr : IJECSE, 2013
    Co-Authors: Segun O. Olatinwo, Kola Ayanlowo, O. Shoewu, Tobi Samuel Fadiji, Olasunmbo O. Ajani, Oladotun Owolabi
    Abstract:

    This paper focuses on the design and development of a security system for an automobile using GSM technology and electronic circuit which is being used to prevent or control the theft of a vehicle. The case of car hijacking has become so rampant that it has become a threat to the world leaders. Some of them cannot drive their expensive cars without escort plus the sounding of siren to scare the evil perpetrators. The necessity of car security cannot be overemphasized by car owners due to high cost of purchasing car nowadays. Car security system using GSM and Electronic circuit had been designed, which can operate in two ways: receiving signal / command from the car owner through the mobile phone or by taken decision by itself using electronic circuit. The signal received through the mobile phone that serves as input to the circuit and immediately sends signal through transistor TR1 and TR2 to the 555 Timer IC1 to other transistors in the circuit and output of one transistor serves as input signal to another. The output signal from the PIC 16F84A or CD 4017 demobilized the central lock system and brain box of the car. The demobilized central lock system and brain box can be reset by calling or sending another signal through the mobile phone to reset the brain box

Ryan B Wicker - One of the best experts on this subject based on the ideXlab platform.

  • integrating stereolithography and direct print technologies for 3d structural electronics fabrication
    Rapid Prototyping Journal, 2012
    Co-Authors: Amit J Lopes, Eric Macdonald, Ryan B Wicker
    Abstract:

    Purpose – The purpose of this paper is to present a hybrid manufacturing system that integrates stereolithography (SL) and direct print (DP) technologies to fabricate three‐dimensional (3D) structures with embedded electronic circuits. A detailed process was developed that enables fabrication of monolithic 3D packages with electronics without removal from the hybrid SL/DP machine during the process. Successful devices are demonstrated consisting of simple 555 Timer circuits designed and fabricated in 2D (single layer of routing) and 3D (multiple layers of routing and component placement).Design/methodology/approach – A hybrid SL/DP system was designed and developed using a 3D Systems SL 250/50 machine and an nScrypt micro‐dispensing pump integrated within the SL machine through orthogonally‐aligned linear translation stages. A corresponding manufacturing process was also developed using this system to fabricate 2D and 3D monolithic structures with embedded electronic circuits. The process involved part de...

  • Conductive polymer-coated threads as electrical interconnects in e-textiles
    Fibers and Polymers, 2011
    Co-Authors: Michael D. Irwin, Ryan B Wicker, David A. Roberson, Richard I. Olivas, Eric Macdonald
    Abstract:

    An organic polymer electrical interconnect is demonstrated. The ionomer mixture poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS; 1:2.5, w:w) was cast onto silk fibers from a 50:50 (v:v) ethylene glycol solution by a dip-coating process. Dynamic mechanical analysis (DMA) results show that Young’s modulus and mechanical strength are maintained during the coating process from acidic solution (pH ∼1). DMA dynamic temperature scans reveal two new thermal transitions once PEDOT:PSS is applied to the silk fiber, and they are assigned to the glass transition temperature (59 °C) and melting point (146 °C) of the ionomer pair. Electrical conductivities of 8.5 S/cm were achieved with four cycles of the dip-coating process, only 10x less than Ag-coated thread control samples. SEM imaging of the PEDOT:PSS-coated fibers show slight texturing to the fibers due to the coating, as well as significant charging in the uncoated samples when compared to PEDOT:PSS-coated samples. The conductive fibers fabricated by this process were successfully applied as electrical interconnects in flexible, fully functional 555 Timer circuits stitched into fabric substrates.

Muhammad Shakir - One of the best experts on this subject based on the ideXlab platform.

  • 555 Timer and comparators operational at 500 c
    IEEE Transactions on Electron Devices, 2019
    Co-Authors: Muhammad Shakir, Shuoben Hou, Alex Metreveli, Arman Ur Rashid, H A Mantooth, Carlmikael Zetterling
    Abstract:

    This paper reports an industry standard monolithic 555-Timer circuit designed and fabricated in the in-house silicon carbide (SiC) low-voltage bipolar technology. This paper demonstrates the 555-Timer integrated circuits (ICs) characterization in both astable and monostable modes of operation, with a supply voltage of 15 V over the wide temperature range of 25 °C–500 °C. Nonmonotonic temperature dependence was observed for the 555-Timer IC frequency, rise time, fall-time, and power dissipation.

  • 555 Timer ic operational at 500 c
    Bipolar SiC 555-timer IC High Temperature ICs TTL Comparator SiC Integrated Circuits, 2019
    Co-Authors: Muhammad Shakir
    Abstract:

    This paper reports an industry standard monolithic 555-Timer circuit designed and fabricated in the in-house silicon carbide (SiC) low-voltage bipolar technology. The paper demonstrates the 555-tim ...