Hi LL. Re posts 22* and 25*. Some people are unusually sensitive to electricity. You may be one of them perhaps? Personally I have very dry skin which helps! Most Forum members will have had some sort of a shock in their time but may not have been so disconcerted by it! There are few deaths-so far! It's less alarming if you DO have some knowledge of electronics-easily gained with study! How much do you understand about what is described? It is concerning that you might place yourself at risk
I'm afraid that selecting random components and asking if that might be the cause is not very efficient in terms of gathering knowledge/experience, no matter how helpful Forum people are [and they nearly always do their very best to assist]. Most older members [the majority of us] had to work things out with very little resource. There is a lot you can research for yourself. Then, if you get stuck along the way, the advice will be even more invaluable.
Dave W