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Printed circuit board or PCB is one of the important things to assemble an electronic circuit. It provides support to the components and makes electrical connection between the parts. In PCB assembling, the components are placed on one side of the Copper laminate passing their pins or leads to the other side through the holes. The pins/leads are then soldered to connect with the PCB tracks. Here explains the easiest method to make a homemade PCB for prototyping.
Bio-Electric Stimulation Therapy (BEST) is the technique in which very small current is passed through the Skin of an affected region to relieve pain. This pulsed current will mimic the natural Action potentials of the nerves so that the nerve conduction will be activated. The most common method of bio electric nerve stimulation is the Transcutaneous Electrical Nerve Stimulation abbreviated as TENS.
Transistor is a semi conductor device which is made as a separate electronic component or as part of integrated circuits. These are made from Silicon or Germanium material. Majority of transistors are Silicon types and they can tolerate high temperature. Transistors may be Bipolar or Field effect transistor.Information for a particular transistor is shown as a code on the body of the transistor.
A Capacitor stores electric charge. Basically a capacitor consists of two metal plates separated by an insulating material called “dielectric”. When connected to a power source such as battery, the capacitor charges up until the potential difference between its terminals become equal to the e.m.f of the battery.
