Why must the square wave be always positive offset?
7 Why must the zapper be battery-operated? It is a lot safer on humans. A battery does not emit any frequencies, just clean DC current and it avoids danger of electric shock for mains operated units. 8 Zapping gave me a skin rash. What can I do? Zapping gives skin irritation to some people. Do not zap on the irritated location. Change location or use carbon handles, slippers or gel pads. Also make sure that the skin at the point of contact is clean. 9 – Why is it important to use 30000 Hz for zapping? According to research of Dr. Clark when a high frequency ac voltage was applied to a human, using hand electrodes, and the current flow measured, it could be seen that the higher the frequency, the greater the current. At about 30,000 cycles per second the current begins to decline, showing the resistance is increasing. Persons with an inflammation in the body can often feel the zapper at that location, suggesting it is a path of low resistance, too, for the 30 KHz zapper current. Inflame
