Seektronics

  A   transistor   is a semiconductor device that switches on and off and amplifies electronic signals. It has at least three terminals that connect it to electronic circuits. The transistor was invented in the early 1950s and quickly replaced vacuum tubes in electronic devices. These devices are now an important part of almost all electronic devices, such as the central processing unit   (CPU)   of computers. A CPU transistor is usually part of an integrated circuit, although it can also be purchased separately.   A central processing unit (CPU). Terminals in CPU transistors have specific names, depending on the type of transistor. The terminals of a simple bipolar transistor are called the collector, emitter, and base. The current or voltage applied to the base affects the flow of current from the collector to the emitter.     The voltage at the base of the transistor can be used to turn on and off the current flowing from the collector to the emitter. This type of transistor is a s