And obviously a transistor that is not turned on at all will consume no energy.Ī transistor that turns ON fully and OFF fully is called a SWITCH. If it is slightly turned ON or nearly fully turned ON, it gets very hot. In other words, a transistor that is fully turned ON and driving a motor, dissipates the least amount of heat. And secondly, a circuit that is ON, consumes the least amount of energy in the controlling device. The signal is either HIGH or LOW (ON or OFF). Firstly it is a very reliable and accurate way to send a signal. Digital is similar to a switch turning something on and off. Equipment such as radios, TV’s and amplifiers process analogue signals. Examples are voice, music, tones, sounds and frequencies. The word analogue is a waveform or signal that is changing (increasing and decreasing) at a constant or non constant rate. IC’s can handle both analogue as well as digital signals but before their arrival, nearly all circuits were analogue or very simple “digital” switching circuits. It’s amazing what you can do with transistors but when Integrated Circuits came along, the whole field of electronics exploded. It contains a further 100 circuits, with many of them containing one or more Integrated Circuits (ICs).
This is the second half of our Transistor Circuits e-book. Introduction to 200 Transistor circuits by Colin Mitchell pdf.
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