Logisim

The goal of Logism is none other than to facilitate the learning of the basic concepts of logic circuits. It is a Java powered tool whose purpose is getting students closer to the electrical design and simulation of digital logic circuits. It is intended as an educational tool, to help you learn how circuits work. One of the main uses of Logism consists in the design and the schematic representation of the CPU or other central processing units. The users of Logism can count on the help of other interesting functions like a combinational analysis model that will help you make conversions of circuits, expressions, Boolean and truth tables; or the possibility the reutilize the smallest of circuits and make them part of bigger circuits. The circuits can be saved as a file program, exported in GIF archives or printed.