Thursday, August 14, 2014

DIY Potentiostat - CheapStat

CheapStat: An Open-Source, “Do-It-Yourself” Potentiostat for Analytical and Educational Applications.

CheapStat - DIY Potentiostat

CheapStat, an inexpensive (<$80), open-source (software and hardware), hand-held potentiostat that can be constructed by anyone who is proficient at assembling circuits. This device supports a number of potential waveforms necessary to perform cyclic, square wave, linear sweep and anodic stripping voltammetry.

CheapStat - DIY Potentiostat

The device supports cyclic, square wave, linear sweep and stripping voltammetry over the potential range −990to +990 mV and over frequencies from 1 to 1000 Hz. The device supports a range of environmental, food and drug quality control, and educational applications. The reverse of the circuit board supports a three-line LCD display and a joystick, which is used to select an experiment protocol, change its parameters (frequency, starting voltage, end voltage, scan rate), and initiate the experiment.

The device's schematics, parts lists, circuit board layout files, sample experiments, and detailed assembly instructions are available in the supporting information and are released under an open hardware license.

Saturday, August 09, 2014

Quite Universal Circuit Simulator - Qucs

An integrated circuit simulator. Sketch the circuit and simulate the large-signal, small-signal and noise behavior of the circuit. After that simulation has finished you can generate and display the simulation results on the presentation output page.

Quite Universal Circuit Simulator - Qucs

The Qucs GUI is well advanced and allows setting up schematics and presenting simulation results in various types of diagrams. DC, AC, S-parameter, noise and transient analysis is possible, mathematical equations and use of a subcircuit hierarchy (with parameterised subcircuits) are available. Qucs can also import existing SPICE models for use in your simulations.

Quite Universal Circuit Simulator - Qucs

EDA and Technical Software Components
  • ADMS -- Verilog-A translator 
  • -- A SPICE preprocessor 
  • ASCO (A SPICE Circuit Optimizer)
  • FreeHDL -- for VHDL digital simulations 
  • Icarus Verilog -- for Verilog-HDL digital simulations 
  • GNU Octave -- for Octave interactive interface
GNU Octave is a high-level interpreted language, primarily intended for numerical computations. It provides capabilities for the numerical solution of linear and nonlinear problems, and for performing other numerical experiments. It also provides extensive graphics capabilities for data visualization and manipulation.

Monday, August 04, 2014 - Embedded Systems Magazine

"Embedded Systems Design was created specifically to meet the information needs of the senior-level developers who create complex embedded systems. For 20 years it has helped them with hardware and software integration that results in designs that work." - Embedded Systems

"You'll find a cornucopia of embedded software here. Browse through all of the code listings from past issues of Embedded Systems Programming magazine, dating back from the premiere issue and extending through the latest issue. Code is organized by year. Please select from the options provided."

Embedded Systems Programming ESP Source Code Archive - Embedded Systems Magazine

All LCD based products, with the exception of some embedded systems, will require a controller to provide a suitable interface and very often a range of display functions critical to a project.

Designing a custom LCD display controller

When a standard LCD controller is not suitable for a particular display screen or application, OEMs must choose between custom designing their own, or hiring a company that specializes in building custom LCD controllers, such as Digital View. In this article, Digital View explains how to approach a custom LCD controller project, and why even experienced engineers sometimes prefer to outsource these designs.