scholarly journals A low-cost computer-controlled function generator suitable for generating visual grating displays

1981 ◽  
Vol 13 (5) ◽  
pp. 647-649
Author(s):  
I. H. Durham ◽  
D. J. Illingworth
Keyword(s):  
Low Cost ◽  
Function Generator ◽  
Computer Controlled

Fixturing of Compliant Parts Using a Matrix of Reconfigurable Pins

1999 ◽  
Vol 122 (4) ◽  
pp. 766-772 ◽  
Author(s):  
Daniel F. Walczyk ◽  
Randy S. Longtin
Keyword(s):  
Low Cost ◽  
Metal Composite ◽  
Lateral Loads ◽  
Load Carrying ◽  
Mechanical Models ◽  
Computer Controlled ◽  
Compliant Parts ◽  
Plastic Parts ◽  
Machining Operations ◽  
Rigid Platen

Commercially-available reconfigurable fixtures, used for holding compliant sheet metal, composite and plastic parts during secondary machining operations, are extremely expensive and overly-complicated devices. A computer-controlled, reconfigurable fixturing device (RFD) concept for compliant parts, based on a matrix of individually-stoppable pins lowered by a single rigid platen, has been developed as a simple and low-cost design alternative to commercially-available devices. Two different approaches to stopping and clamping individual pins have been investigated: a combination electromagnet assist and gas springs compressed with a toggle mechanism, and a pneumatic clamp. Simple mechanical models have been developed for predicting the stopping and clamping performance of both designs including pin positioning accuracy, vertical load-carrying capacity of a pin, and deflection of a pin subjected to lateral loads. An RFD prototype, consisting of a single pin actuated by a servoed platen, has been designed, built and tested. It has demonstrated the feasibility of this new RFD design. [S1087-1357(00)02204-8]

A Low Cost Computer Controlled IC Engine Test Facility

1998 ◽  
Vol 31 (4) ◽  
pp. 105-109
Author(s):  
Z. Ren ◽  
T. Campbell ◽  
J. B. Yang
Keyword(s):  
Low Cost ◽  
Test Facility ◽  
Engine Test ◽  
Ic Engine ◽  
Computer Controlled

Design and Simulation of Signal Generator Based on FPGA

2014 ◽  
Vol 608-609 ◽  
pp. 949-953
Author(s):  
Qiang Chen
Keyword(s):  
Frequency Synthesizer ◽  
Low Cost ◽  
Basic Structure ◽  
Frequency Synthesis ◽  
Function Generator ◽  
Current Function ◽  
Digital Frequency ◽  
Development Cycle ◽  
Short Development Cycle ◽  
Direct Digital Frequency Synthesizer

The article introduced the basic structure and the realization principle of direct digital frequency synthesizer (DDS), and analyzed main properties of DDS system, compared the different ways to achieve frequency synthesis to determine the design scheme in this paper. In addition to the realization of general waveform, the output of the system can realize any hand-painted waveform, improve the shortcomings of the current function generator, and also has the advantages of low cost, low power consumption, short development cycle, flexible design, has the very good practical value and broad application prospect.

Design of a simple, low-cost, computer-controlled, dual-beam optical tweezer system

Optik ◽  
2016 ◽  
Vol 127 (1) ◽  
pp. 440-446 ◽  
Author(s):  
C.J. Firby ◽  
K.N. Smith ◽  
S.R. Gilroy ◽  
A. Porisky ◽  
A.Y. Elezzabi
Keyword(s):  
Low Cost ◽  
Optical Tweezer ◽  
Dual Beam ◽  
Computer Controlled

A Low-Cost, Computer-Controlled Adiabatic Calorimeter for Determining the Heat of Hydration of Concrete

1997 ◽  
Vol 25 (2) ◽  
pp. 261 ◽  
Author(s):  
DR Petersen ◽  
RE Link ◽  
GJ Gibbon ◽  
Y Ballim ◽  
GRH Grieve
Keyword(s):  
Low Cost ◽  
Adiabatic Calorimeter ◽  
Heat Of Hydration ◽  
Computer Controlled

scholarly journals Copper atomic-scale transistors

2017 ◽  
Vol 8 ◽  
pp. 530-538 ◽  
Author(s):  
Fangqing Xie ◽  
Maryna N Kavalenka ◽  
Moritz Röger ◽  
Daniel Albrecht ◽  
Hendrik Hölscher ◽  
...  
Keyword(s):  
Atomic Scale ◽  
Distilled Water ◽  
Electron Charge ◽  
Ambient Conditions ◽  
Switching Rate ◽  
Function Generator ◽  
Copper Electrolyte ◽  
Computer Controlled ◽  
Memory Architectures ◽  
With Memory

We investigated copper as a working material for metallic atomic-scale transistors and confirmed that copper atomic-scale transistors can be fabricated and operated electrochemically in a copper electrolyte (CuSO4 + H2SO4) in bi-distilled water under ambient conditions with three microelectrodes (source, drain and gate). The electrochemical switching-on potential of the atomic-scale transistor is below 350 mV, and the switching-off potential is between 0 and −170 mV. The switching-on current is above 1 μA, which is compatible with semiconductor transistor devices. Both sign and amplitude of the voltage applied across the source and drain electrodes (U bias) influence the switching rate of the transistor and the copper deposition on the electrodes, and correspondingly shift the electrochemical operation potential. The copper atomic-scale transistors can be switched using a function generator without a computer-controlled feedback switching mechanism. The copper atomic-scale transistors, with only one or two atoms at the narrowest constriction, were realized to switch between 0 and 1G 0 (G 0 = 2e2/h; with e being the electron charge, and h being Planck’s constant) or 2G 0 by the function generator. The switching rate can reach up to 10 Hz. The copper atomic-scale transistor demonstrates volatile/non-volatile dual functionalities. Such an optimal merging of the logic with memory may open a perspective for processor-in-memory and logic-in-memory architectures, using copper as an alternative working material besides silver for fully metallic atomic-scale transistors.

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