Relevant bibliographies by topics / *4 keypad lock

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  1. Journal articles

Academic literature on the topic '*4 keypad lock'

Author: Grafiati
Published: 7 June 2025
Last updated: 2 August 2025

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Journal articles on the topic "*4 keypad lock"

1

Li, Menglu, Zifei Wang, Jiying Liang, et al. "A chemical/molecular 4-input/2-output keypad lock with easy resettability based on red-emission carbon dots–Prussian blue composite film electrodes." Nanoscale 10, no. 16 (2018): 7484–93. http://dx.doi.org/10.1039/c8nr01258j.

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2

Li, Qian, Zhenzhong Wang, Jian Xu, Ying Yue, and Shijun Shao. "Recognition and sensing of AcO− and F− using a calix[4]pyrrole-derived hydrazone: a potential molecular keypad lock." RSC Adv. 4, no. 65 (2014): 34470–73. http://dx.doi.org/10.1039/c4ra05499g.

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Calix[4]pyrroles based colorimetric anion receptor 2 could recognize F<sup>−</sup> and AcO<sup>−</sup> anions in DMSO solvent. This type of sensing behaviour could mimic a molecular level keypad lock stimulated by the two sequential chemical inputs (AcO<sup>−</sup> and F<sup>−</sup>), which has the potential for application in security devices.
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3

Arrizal, Ahmad Aziz, Sri Wahyu Suciyati, Arif Surtono, and Gurum Ahmad Pauzi. "Design and Build Entry Access Restriction System Laboratory Using Radio Frequency Identification (RFID) and Keypad Technology." Journal of Energy, Material, and Instrumentation Technology 3, no. 2 (2022): 57–62. http://dx.doi.org/10.23960/jemit.v3i2.101.

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The laboratory access restriction system has been realized using RFID and keypad technology, based on an Arduino microcontroller as a processor. The system has recorded users who entered the room by identifying the RFID tag (transponder) used to open the door from the outside. As for access outside the room, the user only needs to enter the password as identification data on the keypad, and the system would reduce the number of room users and open the door. The output of this system was a solenoid lock which functions as an electronic lock and an LCD to display the status of the RFID reading.
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4

Kumar, Manoj, Abhimanew Dhir, and Vandana Bhalla. "A Molecular Keypad Lock Based on the Thiacalix[4]arene of 1,3-AlternateConformation." Organic Letters 11, no. 12 (2009): 2567–70. http://dx.doi.org/10.1021/ol900845g.

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5

Wibowo, Kunto, Bambang Harianto, and Moohammad Karjadi. "Designing Digital Combination Keys on Safes." Indonesian Journal of Multidisciplinary Science 2, no. 3 (2022): 2044–55. http://dx.doi.org/10.55324/ijoms.v2i3.300.

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A digital combination lock is a key that works electronically and only people who know the code can open it and close it. By doing several combinations consisting of 4 digits, namely by pressing the numbers 0 to 9 on the keypad keys. The digital combination lock on the safe consists of a krndali encoder, decoder, comperator, timer and shif register, also consists of a dc motor that serves to open and pop the safe door. The results of the trials that the safe door conducted when closing and opening it can be set using a potentiote with a lap time of between 1 to 5 seconds.
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6

Valupi, Christine, Tamsir Ariyadi, Nina Paramyta, and Timur Dali Purwanto. "Prototipe Sistem Smart Box untuk Keamanan Penerimaan Paket Online Shopping." Jurnal Ilmiah Universitas Batanghari Jambi 25, no. 1 (2025): 964. https://doi.org/10.33087/jiubj.v25i1.5675.

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This research aims to design a tool with a smart box system that is used by package owners to be able to automatically receive packages and temporarily store packages safely. This tool uses an ESP-32Wroom microcontroller which will process input from the HC-SR04 ultrasonic sensor, HX-711 loadcell and Keypad. The courier can only open the box by inputting the code on the 4 x 4 keypad on the box. When the receipt is successfully entered, the door lock solenoid on the box will be ON and the box will open and the package will be stored in the box. After the package is put into the box by the couri
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7

Wei, Tai-Bao, Wen-Ting Li, Qiao Li, et al. "A dual-channel chemosensor could successively detect CN− and HSO4− in an aqueous solution and act as a keypad lock." RSC Advances 6, no. 49 (2016): 43832–37. http://dx.doi.org/10.1039/c6ra06769g.

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A dual-channel sensor (T) based on a phenazine derivative has been designed and synthesized. The sensor T could successively detect CN<sup>−</sup> and HSO<sub>4</sub><sup>−</sup> in aqueous solution with high selectivity and sensitivity.
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8

Singh, Prabhpreet, Harminder Singh, Gaurav Bhargava, and Subodh Kumar. "‘To kill many birds with one stone’: Addressing half-adder, half-subtractor, demultiplexer, 2-to-4 decoder, comparator, keypad lock with unimolecular system." Sensors and Actuators B: Chemical 245 (June 2017): 1004–14. http://dx.doi.org/10.1016/j.snb.2017.01.204.

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9

Remón, Patricia, Martin Hammarson, Shiming Li, Axel Kahnt, Uwe Pischel, and Joakim Andréasson. "Molecular Implementation of Sequential and Reversible Logic Through Photochromic Energy Transfer Switching." Chem. Eur. J. 17, no. 23 (2011): 6492–500. https://doi.org/10.1002/chem.201100027.

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Photochromic spiropyrans modified with fluorophores were investigated as molecular platforms for the achievement of fluorescence switching through modulation of energy transfer. The dyads were designed in such a way that energy transfer is only observed for the open forms of the photochrome (merocyanine and protonated merocyanine), whereas the closed spiropyran is inactive as an energy acceptor. This was made possible through a deliberate choice of fluorophores (4-amino-1,8-naphthalimide, dansyl, and perylene) that produce zero spectral overlap with the spiro form and considerable overlap for
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10

Remón, Patricia, Martin Hammarson, Li Shiming, Axel Kahnt, Uwe Pischel, and Joakim Andréasson. "Molecular Implementation of Sequential and Reversible Logic Through Photochromic Energy Transfer Switching." Chem. Eur. J. 17, no. 23 (2011): 6492–500. https://doi.org/10.5281/zenodo.10648138.

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Abstract:
Photochromic spiropyrans modified with fluorophores were investigated as molecular platforms for the achievement of fluorescence switching through modulation of energy transfer. The dyads were designed in such a way that energy transfer is only observed for the open forms of the photochrome (merocyanine and protonated merocyanine), whereas the closed spiropyran is inactive as an energy acceptor. This was made possible through a deliberate choice of fluorophores (4-amino-1,8-naphthalimide, dansyl, and perylene) that produce zero spectral overlap with the spiro form and considerable overlap for
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