Circuit and PCB Design
EAGLE PCB Design Software is the tool of choice for thousands of engineers worldwide. With 3 modules and a common interface, EAGLE offers a variety of product combinations and allows every user to choose the configuration that meets their individual requirements.
TinyCAD is a program for drawing electrical circuit diagrams commonly known as schematic drawings. It supports standard and custom symbol libraries. It supports PCB layout programs with several netlist formats and can also produce SPICE simulation netlists. It is also often used to draw one-line diagrams, block diagrams, and presentation drawings.
PCB123 offers a smooth transition from design to manufacturing. That is why we designed PCB123 to be the fastest and easiest PCB design software from start to finish - then decided to give it away for free!
Micro-Cap 11 is an integrated schematic editor and mixed analog/digital simulator that provides an interactive sketch and simulate environment for electronics engineers. Since its original release in 1982, Micro-Cap has been steadily expanded and improved. Micro-Cap 11, the eleventh generation, blends a modern, intuitive interface with robust numerical algorithms to produce unparalleled levels of simulation power and ease of use. Nothing else comes close.
LTspice IV is a high performance SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators. Our enhancements to SPICE have made simulating switching regulators extremely fast compared to normal SPICE simulators, allowing the user to view waveforms for most switching regulators in just a few minutes. Included in this download are LTspice IV, Macro Models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.
ICAP/4Windows offers an extensive SPICE toolset for analog and mixed-signal design. Contains Library Manager, but not Smith charts or model generation tool (SpiceMod). Contains advanced design verification analyses, design pass/fail measurement capability and automated component stress alarms.
KiCad is an EDA software suite for the creation of professional schematics and printed circuit boards up to 32 copper layers with additional technical layers. KiCad runs on Windows, Linux and Apple OS X and is released under the open-source GNU GPL v2 free of charge.
ExpressPCB software is a snap to learn and use. For the first time, designing circuit boards is simple for the beginner and efficient for the professional.