If you don’t want to pay a high price for AutoCAD then you can try this free tool. This tool is specially created for electrical documentation and schematic diagrams. ProfiCAD can be an alternative of high price AutoCAD, however free version only help students due to some limitation.

Here is a feature list:

• easy to learn and use – just drag symbols onto the drawing
• supports Unicode – can use any language, any technical symbol
• ships with cca 700 symbols – new symbols can be easily created
• downloads quickly, installs quickly, starts quickly, takes 5MB on hard drive and can be run from a flash drive
• automatic update – always have the latest version
• continuous numbering of symbols
• intelligent renumbering of symbols when copying

We can see this is a free version of a paid tool, so as always it have some limitation. Here what it does not support when it is free:

• bill of material
• netlist
• document size maximum 2 x 2 sheets of paper
• inserting images into document
• auto-save

The free tool is enough for students need however you must remember it is free for non-commercial use. The single user license cost $192 far less than AutoCAD which cost $3995. However, a user only able to judge which is appropriate for them.