Hi Mark,
I't wasn't hard, I did the drawing in a program called AACircuit. It's designed to do for drawing electronic circuits and my first time using it (only found it and downloaded it yesterday). It's pretty easy to use, it has predefined symbols which can be edited and moved later if required.
It's freeware or as he calls it "Beerware" A very handy tool I'm sure I'll use a lot within programs.
It's located at this site.
http://tech-chat.de/
Credits to Mr Andreas Weber for a great little program
Regards
Deanus
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