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A circuit simulator with graphical user interface (GUI)
Qucs is a circuit simulator with graphical user interface. The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Pure digital simulations are also supported.
DIY Arduino Boards for IO using port expanders and I2C
DIY Arduino Boards PCF8674 MCP23017 74HC595 CD4021
I2C
Parallel IO
Piezo buzzers
See the Files section for a wide range of sensors and sample code
Schematics
PCB Layout
Sample Code
Schematic3d depicts analog circuits in three dimensional space. Third dimension for circuit element is added based on the voltage. It generates animation for transient simulation. (Values of voltages are taken from PSPICE software).
Qlogico is a digital circuit simulator.
True table, manipulation of boolean expresions, schematic capture and simulation, finite state machines, table of transitions, VHDL.
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Virtual electronic circuit simulation with JAVA based schematic entry and wave viewer, based on (Berkeley) SPICE, for any OS/Server/Browser configuration.
Due to missing public feedback for over one year its status is set to INACTIVE (1/2004) - sorry.
A set of KICAD libraries which includes schematic symbols and pcb footprints or modules for KICAD EEschema and KICAD PCBNEW.
It is required the KICAD software to use this libraries