Some time ago I was learning all about caravans and 12 volt systems and came across an article by Colyn Rivers. In the article he showed a calculation wheel which demonstrated what you need to multiply by what to get amps, ohms or anything else connected with power calcs.
Does anyone know where I can find this article?
I have quite a broad knowledge of electrics and electronics but "age is wearying me" and I am forgetting the info that I need.
With all due respect to Colyn I know I could buy all of his books to find it and will probably do so as birthday presents are asked about.
