Most of us in our young age might have come across this prank pen or lighter which when clicked will give a mild electric shock. I also remember my friends using a chewing gum version of it, where if you try to pull a gum out your will experience a shock.
These things are still sold on amazon and Ebay, but I want to build my own version powered with a small battery. So if anyone knows how o build one then please share the idea and provide the circuit diagram also if possible. I tried purchasing a pen from Ebay and take a look at its circuit, but the circuit was all covered with some black clay so it would also be great if some one could explain the working of shock pen or lighter circuit diagram.
Before people trash upon me, I acknowledge that this circuit I am asking for is purely for educational and prank purpose and not intended to hunt/harm any living begins.