Found these in openclipart and wikipedia, A collection of basic electrical symbols you ought to know. You could use these symbols to add in your documentation by cut and paste from an image editor.
![Electrical Symbols that you should Know Electrical Symbols that you should Know](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Electronic symbols that may be useful in your Electronics Art of picture creation.
![Electronic symbol Electronic symbol](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![more ee more ee](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![DPDT and SPDT Switches DPDT and SPDT Switches](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Electronic Component Symbols Electronic Component Symbols](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)