Pub Date : 2025-09-17DOI: 10.1016/j.ohx.2025.e00704
Jhonatan A. Gutierrez-Rivera , Andres F. Roca-Arroyo , David A. Castilla-Casadiego , Alberto Albis
The electrospinning process is a widely used technique for the fabrication of membranes with nanometric fibers, employing polymeric materials such as polyvinylidene fluoride and polycaprolactone. The shape of the fiber collector, whether static or rotating, significantly impacts membrane uniformity. Although rotating drum collectors are the most used, they exhibit drawbacks such as uneven fiber accumulation. Current solutions, which favor rotating over static collectors, tend to be more expensive and complex. This article presents an electrospinning setup that utilizes a flat acrylic plate with bidirectional movement along the X and Y axes, enhancing fiber collection and membrane uniformity. This design improves process efficiency, fiber reproducibility, and system scalability. Polystyrene electrospun nanofibrous membranes were fabricated, and their average fiber diameter and pore size were analyzed, demonstrating the system’s capability to produce micro- and nanometric fibers.
{"title":"Development of a low-cost electrospinning system with a bidirectional collector for uniform nanofibrous membranes","authors":"Jhonatan A. Gutierrez-Rivera , Andres F. Roca-Arroyo , David A. Castilla-Casadiego , Alberto Albis","doi":"10.1016/j.ohx.2025.e00704","DOIUrl":"10.1016/j.ohx.2025.e00704","url":null,"abstract":"<div><div>The electrospinning process is a widely used technique for the fabrication of membranes with nanometric fibers, employing polymeric materials such as polyvinylidene fluoride and polycaprolactone. The shape of the fiber collector, whether static or rotating, significantly impacts membrane uniformity. Although rotating drum collectors are the most used, they exhibit drawbacks such as uneven fiber accumulation. Current solutions, which favor rotating over static collectors, tend to be more expensive and complex. This article presents an electrospinning setup that utilizes a flat acrylic plate with bidirectional movement along the X and Y axes, enhancing fiber collection and membrane uniformity. This design improves process efficiency, fiber reproducibility, and system scalability. Polystyrene electrospun nanofibrous membranes were fabricated, and their average fiber diameter and pore size were analyzed, demonstrating the system’s capability to produce micro- and nanometric fibers.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00704"},"PeriodicalIF":2.1,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-15DOI: 10.1016/j.ohx.2025.e00700
Shinjer Li , Samuel J. Rubin , Tyler Meldrum
Accurate spatial mapping of magnetic fields is crucial for a range of scientific, industrial, and medical magnetic devices. Here, we present RAMM: a Robotic, Autonomous Magnetic field Mapper. RAMM consists of a delta-style 3D robot coupled with a three-axis Hall sensor that is able to measure magnetic fields accurately and at relatively low cost. In addition, RAMM is programmatically controlled via a Python interface, facilitating volumetric measurement of , , and -components of magnetic fields ranging from the millitesla to single-digit Tesla range. We demonstrate the performance of RAMM, via detailed 3D-maps of the magnetic fields of several different sizes and arrangements of permanent magnets, and demonstrate agreement between measured and manufacturer-reported field gradient values. RAMM is easy to build, affordable, and suitable for teaching and research applications.
{"title":"RAMM: A Robotic, Autonomous Magnetic field Mapper","authors":"Shinjer Li , Samuel J. Rubin , Tyler Meldrum","doi":"10.1016/j.ohx.2025.e00700","DOIUrl":"10.1016/j.ohx.2025.e00700","url":null,"abstract":"<div><div>Accurate spatial mapping of magnetic fields is crucial for a range of scientific, industrial, and medical magnetic devices. Here, we present RAMM: a Robotic, Autonomous Magnetic field Mapper. RAMM consists of a delta-style 3D robot coupled with a three-axis Hall sensor that is able to measure magnetic fields accurately and at relatively low cost. In addition, RAMM is programmatically controlled via a Python interface, facilitating volumetric measurement of <span><math><mi>x</mi></math></span>, <span><math><mi>y</mi></math></span>, and <span><math><mi>z</mi></math></span>-components of magnetic fields ranging from the millitesla to single-digit Tesla range. We demonstrate the performance of RAMM, via detailed 3D-maps of the magnetic fields of several different sizes and arrangements of permanent magnets, and demonstrate agreement between measured and manufacturer-reported field gradient values. RAMM is easy to build, affordable, and suitable for teaching and research applications.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00700"},"PeriodicalIF":2.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-11DOI: 10.1016/j.ohx.2025.e00691
Cristian Castillo-Velásquez , Carlos Fuhrhop , Mario E. Flores , Sebastian Brauchi
Electrospinning is a versatile technique widely used in biomedicine and electronics. Here we describe the design and construction of a low-cost Near-Field Electrospinning System (NFES) using open-source technologies, including 3D printing and open-source hardware and software. The system features a modified 3D printer for precise needle and mobile collector control, along with an Arduino-driven syringe pump to regulate the flow of the polymeric solution. A custom user interface ensures optimal conditions during operation. Proof-of-concept tests demonstrate the system capability to fabricate and functionalize microfibers using a polyethylene oxide solution in distilled water.
{"title":"A cost-effective and open-source near-field electrospinning system with a graphical user interface","authors":"Cristian Castillo-Velásquez , Carlos Fuhrhop , Mario E. Flores , Sebastian Brauchi","doi":"10.1016/j.ohx.2025.e00691","DOIUrl":"10.1016/j.ohx.2025.e00691","url":null,"abstract":"<div><div>Electrospinning is a versatile technique widely used in biomedicine and electronics. Here we describe the design and construction of a low-cost Near-Field Electrospinning System (NFES) using open-source technologies, including 3D printing and open-source hardware and software. The system features a modified 3D printer for precise needle and mobile collector control, along with an Arduino-driven syringe pump to regulate the flow of the polymeric solution. A custom user interface ensures optimal conditions during operation. Proof-of-concept tests demonstrate the system capability to fabricate and functionalize microfibers using a polyethylene oxide solution in distilled water.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00691"},"PeriodicalIF":2.1,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-11DOI: 10.1016/j.ohx.2025.e00696
James Cushway , J. Geoffrey Chase , Thomas Desaive , Liam Murphy , Isaac L. Flett , Geoffrey M. Shaw
Patient specific cardiovascular system models have the potential to provide far greater insights into patient conditions than is currently possible in the intensive care unit (ICU). Access to haemodynamic data is imperative for the introduction and validation of these models for model-based care in the ICU. However, current bedside machines are proprietary systems and do not allow access to any data without potentially prohibitive cost, creating a barrier to research and advancements in bedside care. This work presents a novel, low-cost data capture system which allows real time capture of haemodynamic measurements, as well as fluid infusion rates in the ICU. The system consists of an Arduino controlled data capture unit, an adaptor for connecting to existing bedside pressure sensors, and a Python based application which displays and records data sent from the data capture system over a USB serial connection. The total system is highly customizable if needed, and costs a total of NZ$200.
{"title":"A novel clinical data acquisition device: Towards real time cardiovascular modelling in the ICU","authors":"James Cushway , J. Geoffrey Chase , Thomas Desaive , Liam Murphy , Isaac L. Flett , Geoffrey M. Shaw","doi":"10.1016/j.ohx.2025.e00696","DOIUrl":"10.1016/j.ohx.2025.e00696","url":null,"abstract":"<div><div>Patient specific cardiovascular system models have the potential to provide far greater insights into patient conditions than is currently possible in the intensive care unit (ICU). Access to haemodynamic data is imperative for the introduction and validation of these models for model-based care in the ICU. However, current bedside machines are proprietary systems and do not allow access to any data without potentially prohibitive cost, creating a barrier to research and advancements in bedside care. This work presents a novel, low-cost data capture system which allows real time capture of haemodynamic measurements, as well as fluid infusion rates in the ICU. The system consists of an Arduino controlled data capture unit, an adaptor for connecting to existing bedside pressure sensors, and a Python based application which displays and records data sent from the data capture system over a USB serial connection. The total system is highly customizable if needed, and costs a total of NZ$200.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00696"},"PeriodicalIF":2.1,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-11DOI: 10.1016/j.ohx.2025.e00699
Otto Heuschele, R. Ted Jeo, D. Jo Heuschele
In agricultural research, sample preparation for any type of post-harvest analysis is very time consuming. After harvesting samples, they generally need to be ground before further analysis. Grinding plant samples can be accomplished by either an abrasive type or blade type grinders. The abrasive type provides relatively uniform particle size; therefore, it is preferred to prepare material for analytical assays (1 mm). The Foss Cyclotec CT293 grinder comes with a glass container that needs to be removed and cleaned after each sample is ground. We developed a 3D printed adaptor cone that does not need to be removed after each sample and is cleaned when compressed air is vented through the machine to remove residual sample from the abrasive ring. This hardware reduces 27 % of time required for processing per sample (n = 60) and allows for direct sample grinding into different sample storage containers.
{"title":"A 3D printed grinder adaptor for streamlined sample processing","authors":"Otto Heuschele, R. Ted Jeo, D. Jo Heuschele","doi":"10.1016/j.ohx.2025.e00699","DOIUrl":"10.1016/j.ohx.2025.e00699","url":null,"abstract":"<div><div>In agricultural research, sample preparation for any type of post-harvest analysis is very time consuming. After harvesting samples, they generally need to be ground before further analysis. Grinding plant samples can be accomplished by either an abrasive type or blade type grinders. The abrasive type provides relatively uniform particle size; therefore, it is preferred to prepare material for analytical assays (1 mm). The Foss Cyclotec CT293 grinder comes with a glass container that needs to be removed and cleaned after each sample is ground. We developed a 3D printed adaptor cone that does not need to be removed after each sample and is cleaned when compressed air is vented through the machine to remove residual sample from the abrasive ring. This hardware reduces 27 % of time required for processing per sample (n = 60) and allows for direct sample grinding into different sample storage containers.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00699"},"PeriodicalIF":2.1,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-06DOI: 10.1016/j.ohx.2025.e00695
Alex Kana-Chuctaya, Alexander Hilario-Tacuri
This work presents the design and implementation of an automated prototype system for measuring antenna radiation patterns, using Software Defined Radio (SDR), a stepper motor-driven rotational platform, and custom 3D printed components. The system is powered by a Raspberry Pi processing unit, equipped with a touchscreen interface for real-time control and data visualization. The prototype enables automated 360°sweeps in either the horizontal (azimuth) or vertical (elevation) plane, facilitating signal strength measurements across a broad sub-6 GHz frequency range (70 MHz – 5.9 GHz). The prototype was validated by measuring the radiation pattern of an ultra-wide band (700 to 6000 MHz) flexible antenna under far-field conditions and in non-anechoic environment, demonstrating its practical applicability with acceptable accuracy. Performance was evaluated by comparing the measured radiation patterns against the manufacturer’s reference data, yielding a root mean square error (RMSE) and a mean absolute error (MAE) below 0.172 (3.260 dB) and 0.139 (2.625 dB), respectively. These results indicate that the prototype offers a low-cost, reliable, modular, and adaptable solution for antenna characterization, suitable for both academic research and practical telecommunications applications. Furthermore, the hardware and software are open source, promoting ease of replication and enabling future enhancements.
{"title":"Development of a prototype antenna radiation pattern measurement system using Software-Defined Radio","authors":"Alex Kana-Chuctaya, Alexander Hilario-Tacuri","doi":"10.1016/j.ohx.2025.e00695","DOIUrl":"10.1016/j.ohx.2025.e00695","url":null,"abstract":"<div><div>This work presents the design and implementation of an automated prototype system for measuring antenna radiation patterns, using Software Defined Radio (SDR), a stepper motor-driven rotational platform, and custom 3D printed components. The system is powered by a Raspberry Pi processing unit, equipped with a touchscreen interface for real-time control and data visualization. The prototype enables automated 360°sweeps in either the horizontal (azimuth) or vertical (elevation) plane, facilitating signal strength measurements across a broad sub-6 GHz frequency range (70 MHz – 5.9 GHz). The prototype was validated by measuring the radiation pattern of an ultra-wide band (700 to 6000 MHz) flexible antenna under far-field conditions and in non-anechoic environment, demonstrating its practical applicability with acceptable accuracy. Performance was evaluated by comparing the measured radiation patterns against the manufacturer’s reference data, yielding a root mean square error (RMSE) and a mean absolute error (MAE) below 0.172 (3.260 dB) and 0.139 (2.625 dB), respectively. These results indicate that the prototype offers a low-cost, reliable, modular, and adaptable solution for antenna characterization, suitable for both academic research and practical telecommunications applications. Furthermore, the hardware and software are open source, promoting ease of replication and enabling future enhancements.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00695"},"PeriodicalIF":2.1,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-06DOI: 10.1016/j.ohx.2025.e00688
Ferdinand Lange, Sascha Beutel
This article introduces the next generation of the Gateway-Module, which is designed to simplify experimental setups and to further advance digitization. Based on the innovative work of Porr et al. in 2020, the Gateway-Module-v3 replaces the single board computer (SBC) with a Phytec i.MX 8M Plus (phycore-imx8mp) System on Module (SoM). This upgrade significantly reduces the physical size of the module to a compact 5.4 cm width, length, and height. Gateway-Module-v3 seamlessly integrates with standards such as Standard in Laboratory Automation (SiLA 2) and Open Platform Communication Unified Architecture (OPC-UA), advancing the digitization and efficiency of laboratory operations. At the center of its innovation is the tty2eth management module, which provides robust remote monitoring and maintenance using SSH and Prometheus metrics to ensure that experiments run smoothly even from remote locations. The Gateway-Module-v3 offers a wide range of connectivity options, including GPIO, USB and serial ports, making it adaptable to a variety of applications. Rigorous stress testing has confirmed its reliability and performance under demanding conditions, highlighting the suitability for both laboratory and remote scenarios. With its advanced functionality and connectivity, the Gateway-Module-v3 is ready to support researchers, advance their work, and will serve as a fundamental resource for current and future needs.
本文介绍了下一代网关模块，旨在简化实验设置并进一步推进数字化。基于Porr等人在2020年的创新工作，Gateway-Module-v3用Phytec i.MX 8M Plus （phycore-imx8mp）模块系统（SoM）取代了单板计算机（SBC）。此次升级显著减小了模块的物理尺寸，宽度、长度和高度均为5.4厘米。Gateway-Module-v3与实验室自动化标准（SiLA 2）和开放平台通信统一架构（OPC-UA）等标准无缝集成，提高了实验室操作的数字化和效率。其创新的核心是tty2eth管理模块，该模块使用SSH和Prometheus度量提供强大的远程监控和维护，以确保即使从远程位置也能顺利运行实验。Gateway-Module-v3提供了广泛的连接选项，包括GPIO， USB和串行端口，使其适应各种应用。严格的压力测试证实了其在苛刻条件下的可靠性和性能，突出了实验室和远程场景的适用性。凭借其先进的功能和连接性，网关模块v3已准备好支持研究人员，推进他们的工作，并将作为当前和未来需求的基本资源。
{"title":"Advancing IoT in the lab: Next generation Gateway-Module for laboratory device integration","authors":"Ferdinand Lange, Sascha Beutel","doi":"10.1016/j.ohx.2025.e00688","DOIUrl":"10.1016/j.ohx.2025.e00688","url":null,"abstract":"<div><div>This article introduces the next generation of the Gateway-Module, which is designed to simplify experimental setups and to further advance digitization. Based on the innovative work of Porr et al. in 2020, the Gateway-Module-v3 replaces the single board computer (SBC) with a Phytec i.MX 8M Plus (phycore-imx8mp) System on Module (SoM). This upgrade significantly reduces the physical size of the module to a compact 5.4 cm width, length, and height. Gateway-Module-v3 seamlessly integrates with standards such as Standard in Laboratory Automation (SiLA 2) and Open Platform Communication Unified Architecture (OPC-UA), advancing the digitization and efficiency of laboratory operations. At the center of its innovation is the tty2eth management module, which provides robust remote monitoring and maintenance using SSH and Prometheus metrics to ensure that experiments run smoothly even from remote locations. The Gateway-Module-v3 offers a wide range of connectivity options, including GPIO, USB and serial ports, making it adaptable to a variety of applications. Rigorous stress testing has confirmed its reliability and performance under demanding conditions, highlighting the suitability for both laboratory and remote scenarios. With its advanced functionality and connectivity, the Gateway-Module-v3 is ready to support researchers, advance their work, and will serve as a fundamental resource for current and future needs.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00688"},"PeriodicalIF":2.1,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-05DOI: 10.1016/j.ohx.2025.e00698
Henry W. Hall, Lui Holder-Pearson, Cong Zhou, J. Geoffrey Chase
Electrical impedance Tomography (EIT) is a developing medical imaging technology with several benefits over current screening modalities. EIT can produce real time images for a lower cost and with fewer health risks than most common screening techniques. However, EIT is still the subject of research due to a lack of spatial resolution.
This work demonstrates an EIT device capable of injecting current into a test subject and measuring the induced boundary voltages from electrodes. The device was designed to be flexible, allowing for different avenues of research to be pursued. Commercial devices do not allow changes to imaging protocols and so are not suitable for most research. The device is split into four different PCBs that can be altered easily. This design allows additional channels or rings of electrodes to be added to the device. The bandwidth of the voltage acquisition board is between 1 kHz and 2 MHz. This bandwidth limits the frequency components of signals that the device can detect. The Current stimulation board can generate arbitrary signals with frequency components up to 2 MHz. The modular circuit design and large bandwidth of the device allow for easy changes to imaging protocols. However, this flexibility means the device is not optimized for a single use case.
The device can accurately detect targets in a saline tank when used with the open-source reconstruction software, GREIT. It has a mean Signal to Noise Ratio (SNR) of 85.4 dB and a mean homogenous reconstruction accuracy of 85.5 %. Overall, this study demonstrates the functionality and theory of an Open-Source EIT device that can be used to assist research.
{"title":"A modular open-source platform for electrical impedance tomography applications","authors":"Henry W. Hall, Lui Holder-Pearson, Cong Zhou, J. Geoffrey Chase","doi":"10.1016/j.ohx.2025.e00698","DOIUrl":"10.1016/j.ohx.2025.e00698","url":null,"abstract":"<div><div>Electrical impedance Tomography (EIT) is a developing medical imaging technology with several benefits over current screening modalities. EIT can produce real time images for a lower cost and with fewer health risks than most common screening techniques. However, EIT is still the subject of research due to a lack of spatial resolution.</div><div>This work demonstrates an EIT device capable of injecting current into a test subject and measuring the induced boundary voltages from electrodes. The device was designed to be flexible, allowing for different avenues of research to be pursued. Commercial devices do not allow changes to imaging protocols and so are not suitable for most research. The device is split into four different PCBs that can be altered easily. This design allows additional channels or rings of electrodes to be added to the device. The bandwidth of the voltage acquisition board is between 1 kHz and 2 MHz. This bandwidth limits the frequency components of signals that the device can detect. The Current stimulation board can generate arbitrary signals with frequency components up to 2 MHz. The modular circuit design and large bandwidth of the device allow for easy changes to imaging protocols. However, this flexibility means the device is not optimized for a single use case.</div><div>The device can accurately detect targets in a saline tank when used with the open-source reconstruction software, GREIT. It has a mean Signal to Noise Ratio (SNR) of 85.4 dB and a mean homogenous reconstruction accuracy of 85.5 %. Overall, this study demonstrates the functionality and theory of an Open-Source EIT device that can be used to assist research.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00698"},"PeriodicalIF":2.1,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-02DOI: 10.1016/j.ohx.2025.e00694
Filip Wylęgała, Tadeusz Uhl
This article details the design, construction, and operation of a benchtop centrifuge tailored for adhesion measurements. The device is intentionally simple, leveraging widely available components and exclusively employing 3D printing as the manufacturing method. The centrifuge facilitates the measurement of detachment forces, with user-adjustable sample attachment points via an interface or double-sided tape. The adhesion force is determined by considering both the detachment force and the mass of the dust; to achieve this, optical microscopy may be employed to determine the dust mass accurately. A user-friendly graphical interface allows for the input of desired rotational speeds and durations, while a built-in encoder and PID algorithm ensure precise operation.
Dust adhesion presents significant challenges for measurement, and this centrifuge addresses these challenges through a compact, modular design comprising four 3D-printed components, an Arduino Uno, a power socket, wiring, a motor controller, bearings, an encoder-equipped motor, and a plastic dome. Assembly is completed with a set of screws.
The primary application of this device is to evaluate the detachment forces of lunar regolith simulants on various materials. However, the design is versatile and can be adapted for spectrometry or as a compact centrifuge for biological applications.
{"title":"Centrifugal device for dust adhesion measurement","authors":"Filip Wylęgała, Tadeusz Uhl","doi":"10.1016/j.ohx.2025.e00694","DOIUrl":"10.1016/j.ohx.2025.e00694","url":null,"abstract":"<div><div>This article details the design, construction, and operation of a benchtop centrifuge tailored for adhesion measurements. The device is intentionally simple, leveraging widely available components and exclusively employing 3D printing as the manufacturing method. The centrifuge facilitates the measurement of detachment forces, with user-adjustable sample attachment points via an interface or double-sided tape. The adhesion force is determined by considering both the detachment force and the mass of the dust; to achieve this, optical microscopy may be employed to determine the dust mass accurately. A user-friendly graphical interface allows for the input of desired rotational speeds and durations, while a built-in encoder and PID algorithm ensure precise operation.</div><div>Dust adhesion presents significant challenges for measurement, and this centrifuge addresses these challenges through a compact, modular design comprising four 3D-printed components, an Arduino Uno, a power socket, wiring, a motor controller, bearings, an encoder-equipped motor, and a plastic dome. Assembly is completed with a set of screws.</div><div>The primary application of this device is to evaluate the detachment forces of lunar regolith simulants on various materials. However, the design is versatile and can be adapted for spectrometry or as a compact centrifuge for biological applications.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00694"},"PeriodicalIF":2.1,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-01DOI: 10.1016/j.ohx.2025.e00689
Paria Samimisabet, Laura Krieger, Marc Vidal De Palol, Deniz Gün, Gordon Pipa
Electroencephalography (EEG) is widely used in fields such as neurology, cognitive neuroscience, sleep research, and mental health. It records brain electrical activity to study neurophysiological functions. Numerous EEG and mobile EEG systems are available. However, adherence to the standards set by the International Federation of Clinical Neurophysiology (IFCN) is essential for ensuring high-quality data collection in clinical environments. The DreamMachine, a mobile EEG device, complies fully with these standards, offering 24-channel recordings at 250 Hz, Bluetooth Low Energy (BLE), and capabilities for electrooculography (EOG) and electrocardiography (ECG). Its low cost makes it an accessible option for EEG studies. The software architecture of the open-source DreamMachine is detailed in this study. Focus is placed on data compression and communication between the device and its companion Android application. The details of the Android application’s features, including gain settings, bits per channel, filters, bit-shifting, and safety factors, are investigated. Subsequently, the system’s performance is evaluated through a standard eyes-open/eyes-closed experiment, comparing its results with a laboratory EEG system across a significant number of participants to assess the performance of the DreamMachine system.
{"title":"Enhancing mobile EEG: Software development and performance insights of the DreamMachine","authors":"Paria Samimisabet, Laura Krieger, Marc Vidal De Palol, Deniz Gün, Gordon Pipa","doi":"10.1016/j.ohx.2025.e00689","DOIUrl":"10.1016/j.ohx.2025.e00689","url":null,"abstract":"<div><div>Electroencephalography (EEG) is widely used in fields such as neurology, cognitive neuroscience, sleep research, and mental health. It records brain electrical activity to study neurophysiological functions. Numerous EEG and mobile EEG systems are available. However, adherence to the standards set by the International Federation of Clinical Neurophysiology (IFCN) is essential for ensuring high-quality data collection in clinical environments. The DreamMachine, a mobile EEG device, complies fully with these standards, offering 24-channel recordings at 250 Hz, Bluetooth Low Energy (BLE), and capabilities for electrooculography (EOG) and electrocardiography (ECG). Its low cost makes it an accessible option for EEG studies. The software architecture of the open-source DreamMachine is detailed in this study. Focus is placed on data compression and communication between the device and its companion Android application. The details of the Android application’s features, including gain settings, bits per channel, filters, bit-shifting, and safety factors, are investigated. Subsequently, the system’s performance is evaluated through a standard eyes-open/eyes-closed experiment, comparing its results with a laboratory EEG system across a significant number of participants to assess the performance of the DreamMachine system.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"23 ","pages":"Article e00689"},"PeriodicalIF":2.1,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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