electronics program circuits and projects

ExpressPCB circuit board layout program is a snap to learn and use. Laying out PCBs is easy, even for the first time user. Here are the steps:

• Select the Components in ExpressPCB
  Begin your layout by adding the components. Select the parts from the Component Manager dialog box. Many components (such as connectors) include Digi-key part numbers to make ordering easy.
• Position the Components
  Drag each component to the desired location on your board. The Snap to grid feature makes it easy to neatly align the parts.
• Add the Traces
  Now add each trace by clicking on the pin of a component and dragging the trace to another pin. If you link your schematic file to the PCB, then the ExpressPCB program highlights the pins that should be wired together in blue.
• Edit the Layout in ExpressPCB
  Making changes is simple using standard commands such as Copy, Cut and Paste. Rearrange the parts by dragging them with the mouse. Traces always stay connected to their pins, even when you move things around. You can set the properties of items in your layout by double-clicking on them. For example, double-click on a trace to change its layer or width.

Express PCB download – download

SVC filter is a program designed to expedite the design and analysis of lowpass (and highpass) filters with nearest 5% component values. SVCfilter is 32-bit Windows® electrical filter design software nicely written to help the radio amateur, technician or engineer design and analyze lumped-element lowpass and highpass filters.

printedcircuitsboards.com just realeased 10 free PCB design software tools available for download on the internet.
Here are some of the programs: ZenitPCB, FreePCB, TinyCAD, OsmondPCB, ExpressPCB and more.

RFSim99 is a freeware software that can help you in RF simulation, in your projects, especially if you are trying to design radio filters.

RFSim99 works with S-parameters. This means that not only will it simulate and analyse circuits built out of its internal library of components, but that it can accommodate any circuit block or stage for which these are known.