scholarly journals Design and fabrication of low-cost micromachining system for prototyping printed circuit boards

2021 ◽  
Author(s):  
Dhinesh S K ◽  
◽  
Senthil Kumar K L ◽  
Megalingam A ◽  
Gokulraj A P ◽  
...  
Keyword(s):  
Printed Circuit Boards ◽  
Low Cost ◽  
Working Environment ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Milling Operation ◽  
Wide Range ◽  
Complex Shapes ◽  
The Cost ◽  
Selection Of

Printed circuit boards (PCBs) have a portentous position in constructing modern electronic equipment. Currently, chemical etching is the process used to produce PCBs at huge volumes, which is not suitable for preparing prototypes. The working environment is also not an encouraging one. There is no economical way to manufacture PCBs in low volumes, which is the basic requirement for Small and Medium Scale Enterprises (SMEs). Prototyping the desired circuit boards, prior to the mass production, is essential to avoid major losses by producing faulty designs. Developing a low-cost machine for prototyping PCBs may overcome these drawbacks. Hence, in this work, a machine capable of performing PCB mechanical milling operation on wide range of materials like copper/epoxy boards and flexible substrates has been developed. The machine developed is capable of milling lines that are 0.3 mm in width and 0.46 mm in depth. The performance of the machine reveals that it can mill any complex shapes and designs with expected accuracy. Selection of hardware components according to the needs would reduce the cost and programming snag further, which makes it affordable to SMEs.

scholarly journals Separation and Recovery of Fine Particles from Waste Circuit Boards Using an Inflatable Tapered Diameter Separation Bed

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Chenlong Duan ◽  
Cheng Sheng ◽  
Lingling Wu ◽  
Yuemin Zhao ◽  
Jinfeng He ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Printed Circuit Boards ◽  
Fine Particles ◽  
Metal Recovery ◽  
Circuit Board ◽  
Circuit Boards ◽  
Recovery Rates ◽  
Operational Conditions ◽  
Printed Circuit ◽  
Wide Range

Recovering particle materials from discarded printed circuit boards can enhance resource recycling and reduce environmental pollution. Efficiently physically separating and recovering fine metal particles (−0.5 mm) from the circuit boards are a key recycling challenge. To do this, a new type of separator, an inflatable tapered diameter separation bed, was developed to study particle motion and separation mechanisms in the bed’s fluid flow field. For 0.5–0.25 mm circuit board particles, metal recovery rates ranged from 87.56 to 94.17%, and separation efficiencies ranged from 87.71 to 94.20%. For 0.25–0.125 mm particles, metal recovery rates ranged from 84.76 to 91.97%, and separation efficiencies ranged from 84.74 to 91.86%. For superfine products (−0.125 mm), metal recovery rates ranged from 73.11 to 83.04%, and separation efficiencies ranged from 73.00 to 83.14%. This research showed that the inflatable tapered diameter separation bed achieved efficient particle separation and can be used to recover fine particles under a wide range of operational conditions. The bed offers a new mechanical technology to recycle valuable materials from discarded printed circuit boards, reducing environmental pollution.

scholarly journals MeteoMex: Open infrastructure for networked environmental monitoring and agriculture 4.0

2020 ◽  
Author(s):  
Robert Winkler
Keyword(s):  
Food Production ◽  
Printed Circuit Boards ◽  
Low Cost ◽  
Environmental Sensors ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Smart Farming ◽  
Public Areas ◽  
Terrestrial Life ◽  
Iot Platforms

<div>Air, water, and soil are essential for terrestrial life, but pollution, overexploitation, and climate change jeopardize the availability of these primary resources. Thus, assuring human health and food production requires efficient strategies and technologies for environmental protection. Knowing key parameters such as soil moisture, air, and water quality is essential for smart farming and urban development. </div><div>The MeteoMex project aims to build simple hardware kits and their integration into current Internet-of-Things (IoT) platforms. This paper shows the use of low-end Wemos D1 mini boards to connect environmental sensors to the open-source platform ThingsBoard. Two printed circuit boards (PCB) were designed for mounting components. Analog, digital and I<sup>2</sup>C sensors are supported. The Wemos ESP8266 microchip provides WiFi capability and can be programmed with the Arduino IDE. Application examples for the MeteoMex aeria and terra kits demonstrate their functionality for air quality, soil, and climate monitoring.</div><div>Further, a prototype for monitoring wastewater treatment is shown, which exemplifies the capabilities of the Wemos board for signal processing. The data are stored in a PostgreSQL database, which enables data mining. The MeteoMex IoT system is highly scalable and of low cost, which makes it suitable for deployment in agriculture 4.0, industries, and public areas. </div><div>Circuit drawings, PCB layouts, and code examples are free to download from https://github.com/robert-winkler/MeteoMex.</div>

Chip Embedding for Printed Circuit Boards and Subsystems

2010 ◽  
Vol 2010 (1) ◽  
pp. 000891-000897 ◽  
Author(s):  
Thomas Gottwald ◽  
Alexander Neumann
Keyword(s):  
Embedded Systems ◽  
Significant Influence ◽  
Printed Circuit Boards ◽  
Emerging Technologies ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Manufacturing Complexity ◽  
Electrical Component ◽  
Escape Routing ◽  
The Cost

The reason for chip embedding by means of PCB technology are manifold. Actually there are several emerging technologies on the market which all face one common problem: To realize the escape routing of a high pin count die one has to use several build up layers or very fine lines & spaces for the PCB. Both approaches have a significant influence on the cost of a electrical component because both solutions raise the manufacturing complexity. Due to this problem approaches like “chip first” or “chip last” are being discussed in plenty of papers. With this paper, an alternative way of producing embedded systems is mentioned, which overcomes many of the actual problems.

Low-cost TO-CAN package combined with flexible and hard printed circuit boards for 25 - Gb / s optical subassembly modules

2017 ◽  
Vol 56 (2) ◽  
pp. 026108
Author(s):  
Jau-Ji Jou ◽  
Tien-Tsorng Shih ◽  
Cheng-Ying Wu ◽  
Zhe-Xian Su
Keyword(s):  
Printed Circuit Boards ◽  
Low Cost ◽  
Circuit Boards ◽  
Printed Circuit

The Use of Polymer Thick Film for Making Printed Circuit Boards

1982 ◽  
Vol 1 (1) ◽  
pp. 22-23 ◽  
Author(s):  
F.W. Martin
Keyword(s):  
Thick Film ◽  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Electronics Industry ◽  
Circuit Board ◽  
Technical Knowledge ◽  
Circuit Boards ◽  
Printed Circuit ◽  
The Cost

The electronics industry is facing a situation in which the cost of electronic functions is dropping continuously while the cost of interconnecting the functions by traditional means, especially through the use of printed circuit boards, continues to rise. Polymer thick film is one proven approach to reversing the trend of rising interconnection costs. It is relatively easy for the typical printed circuit board manufacturer to convert to or adapt polymer thick film because he has most of the necessary equipment, technical knowledge and personnel.

scholarly journals Design and Implementation of Solder Paste Dispenser Based on Linear Drive System

2019 ◽  
Vol 3 (2) ◽  
pp. 338
Author(s):  
Riky Tri Yunardi ◽  
Moh. Zakky Zulfiar ◽  
Rr. Wanda Auruma Putri ◽  
Deny Arifianto
Keyword(s):  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Low Cost ◽  
Circuit Board ◽  
Solder Paste ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Design And Implementation ◽  
Stepper Motors ◽  
Drive Systems

In the technology to create prototypes for electronic hardware is usually constructed using surface mount device printed circuit board (SMD PCB). In this paper introduces the design and implementation of low-cost electrical solder paste dispenser that supports the PCB solder process. The design consists of a nozzle and linear drive systems based on stepper motors operating with electric power to push the plunger down to drop the solder paste on the board. To test the performance of solder paste that has been designed verified by experiment. Solder paste dispenser design was tested using SMD resistor with the solder pads of different sizes for R0603, R0805, and R1206 on PCB. The results showed that the design of the prototype was able to put the pasta in various field pads between 0.54 mm2, 0.91 mm2 and 1.44 mm2 for standard solder pads with an error in the 2% - 5%. Based on the results, the device has been shown to potentially be used to attach electronic components to printed circuit boards.

scholarly journals MeteoMex: open infrastructure for networked environmental monitoring and agriculture 4.0

2021 ◽  
Vol 7 ◽  
pp. e343
Author(s):  
Robert Winkler
Keyword(s):  
Food Production ◽  
Printed Circuit Boards ◽  
Low Cost ◽  
Environmental Sensors ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Smart Farming ◽  
Public Areas ◽  
Terrestrial Life ◽  
Iot Platforms

Air, water, and soil are essential for terrestrial life, but pollution, overexploitation, and climate change jeopardize the availability of these primary resources. Thus, assuring human health and food production requires efficient strategies and technologies for environmental protection. Knowing key parameters such as soil moisture, air, and water quality is essential for smart farming and urban development. The MeteoMex project aims to build simple hardware kits and their integration into current Internet-of-Things (IoT) platforms. This paper shows the use of low-end Wemos D1 mini boards to connect environmental sensors to the open-source platform ThingsBoard. Two printed circuit boards (PCB) were designed for mounting components. Analog, digital and I2C sensors are supported. The Wemos ESP8266 microchip provides WiFi capability and can be programed with the Arduino IDE. Application examples for the MeteoMex aeria and terra kits demonstrate their functionality for air quality, soil, and climate monitoring. Further, a prototype for monitoring wastewater treatment is shown, which exemplifies the capabilities of the Wemos board for signal processing. The data are stored in a PostgreSQL database, which enables data mining. The MeteoMex IoT system is highly scalable and of low cost, which makes it suitable for deployment in agriculture 4.0, industries, and public areas. Circuit drawings, PCB layouts, and code examples are free to download from https://github.com/robert-winkler/MeteoMex.

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