RESOURCES
dxf viewer
If you would like to check your DXF/drawing files online, use this link
3d viewer online
If you would like to check your 3D step files free online, use this link
gerber files viewer
If you would like to check your Gerber files online, use this link
DXF CONVERTER
If you need to convert a document or part of it to an high quality DXF file, use this link
units converter
If you need to convert units (mm, mil, Oz ETC.), use this link
File Converter online
If you need to convert almost any file type to another type
gerber viewer download
Check your Gerber files with Gerber viewer on your PC, use this link
LTspice - simulation
Free and powerful universal simulator, based on SPICE
Impedance calculator
IPC 2141 Trace Impedance Calculator is useful free web calculator