This is a DIY version of a device that can be found in various forms in the clinics of physiotherapists and massage institutes. It produces a series of electrical shocks that stimulate the muscles. The intensity and duration of the shocks are adjustable, and we have given great attention to the safety of this device.Anyone who has ever visited the clinic of a physiotherapist or a sports masseur will have been amazed at the large amount of complex-looking equipment to be found there. In this area, as in many others, modern technology (and in particular electronics technology) has become indispensable in a relatively short time.One type of equipment that is most often used by these people is a muscle stimulator. There are all sorts of different models available with a variety of names, but they all work in essentially the same manner. Two electrodes are attached to some part of the body a small ways apart, and a pulsating current is passed between the electrodes. The objective of this is to stimulate the muscle located between the electrodes.