Transistors (Changing Bits)
The most important invention in the history of computers is (arguably) the transistor. A transistor can serve two purposes:
- It can amplify a signal (transistor radio).
- It can switch on and off ridiculously fast. This fast switching is what allows a computer to make decisions very fast.
Think of a transistor like a
gatewhich either allows electricity through (1) or blocks it (0). If a small amount of electricity is applied to the
basepin, whatever is on the
collectorpin is permitted through the
When the base is "on" the electricity flows out the emitter