What I'm trying to ask is what voltage and current is necessary in order for it to be felt on the skin when touching an electrode? And is AC of DC better for this job?
I know it depends on the distance between the electrodes and the resistance of the skin.
To put this into perspective, I'm trying to replace vibration notifications - like the ones found in smart watches- with an electric shock. I couldn't find any information on this. Maybe someone can give me some good starting values or an amperage and voltage range and I can just experiment to find the optimum.