Resistors is a program to calculate the most suitable E-series resistors for voltage dividers or for generating other values by putting two resistors in parallel. It is especially useful for selecting resistor values for the voltage dividers used in variable voltage regulators. In effect, the voltage in the middle of the divider is known, and you want to achieve a regulated voltage (the top value).
HDLmaker generates hierarchical Verilog and VHDL code, PCB netlists, simulation and synthesis scripts/projects/make files, and schematics. It can translate Verilog/VHDL and HDLmaker projects into HTML, including extensive hyperlinking between the modules. It can also translate PADS PCB netlists into Verilog and VHDL and can do some simple VHDL to Verilog translations. HDLMaker synplifies the development of complex FPGAs and ASICs, and has extensive support for most Xilinx FPGAs.
Liquid PCB is a computer aided design application for designing printed circuit boards. Unlike other PCB CAD applications, you are not restricted to straight tracks and 45º angles. Instead, you can freely draw tracks any way you like, and the tracks themselves will move and bend as required to maintain your design rules. Vias and components are also free to move and rotate. The user interface exposes all functions through the multi-directional expanding mouse menu and the keyboard instead of through icons and menus.
Pyspice is an easily extendable SPICE pre-processor written in Python to reduce simulation times with little loss in accuracy. It was inspired by John Sheahan's spicepp and developed as a modular and extensible method of pre-processing netlists. Primarily, it has been used to reduce netlists from the output of layout extraction tools. It combines parallel MOSFETs and capacitors, and optionally drops small capacitors. Planned improvements include a hierarchical namespace (e.g. .subckt/.ends and .alter blocks), more devices, and .include/.model support. Unlike other pre-processors, comments and blank lines are preserved in their relative positions. This keeps the output netlist readable for subsequent editing or processing.
Bartels AutoEngineer is a commercial CAD tool for electrical / computer engineers. It supports Linux, Win95/NT, DOS, OS/2, HP, DEC and Sun. Features include a schematic Editor with hierarchical design support, Forward/Backward Annotation, PCB Layout system, CAM Processor, CAM View, Integrated, object-oriented database system, User Language Compiler, utility programs for database management, foreign net list and design data import, etc. and part libraries for SCM and PCB layout
SpiProg is a programmer for SPI (Serial Peripheral Interconnect) compatible EEPROMs used in many modern small electronic devices such as cellular phones. The package contains building instructions for a very simple parallel port adaptor and source code of the programming software. It has a small built-in command line driven hex editor and supports devices like Xicor X25640 and Atmel AT25080.
Gnu Circuit Analysis Package is a general purpose circuit simulator. It performs nonlinear DC and transient analysis, fourier analysis, and AC analysis. Spice compatible models for the MOSFET (level 1- 7) and diode are included. This project is not based on Berkeley Spice, but some of the models have been derived from the Berleley models. It was formerly known as 'Al's Circuit Simulator'.