I am planing to build one simple tester for my friend, working with cars. But I am faced with one problem. Realy high voltage must be monitored for a short time - spark. It can be up tu 14 kV, so, voltage deviders and so on, can't be used. Could anybody throw any idea?

Thanks in advance!

P.S. Question is almost "off topic", but I'm going to use AT89C52 for the project, so it is related with 8052 :)))))