The output can also be shown on an oscilloscope, the precise frequency shown by means of an internal frequency counter. The frequency can be regulated by a variable resistance and the output shown by a blinking LED or a loudspeaker emitting an audio tone, as appropriate to the frequency. Many types of oscillators can be constructed from simple electrical components, powered by a nine-volt battery. The same situation exists for a clock mechanism where a spring or set of weights feeds stored energy into the system. The energy must come from an electrical circuit, a dc power supply, or some other kind of generator. To maintain a continuous output, there must be an ongoing supply of new energy. This is known as a damped wave, and it is common in electrical and nonelectrical oscillating energy in nature.Īn oscillator implies a continuous sustained output.
Because of inevitable electrical resistance in the circuit, the voltage at the output will diminish, approaching zero.
We have seen that a resonant circuit, because of equal inductive and capacitive reactances, can output electrical energy at discrete frequencies.
#LED FEED BACK OSCULATOR GENERATOR#
There are countless other applications, from the microwave oven with its high-frequency force field, to the function generator embedded in the Tektronix MDO 3104 oscilloscope. Without it, radio and TV transmission and reception as we know them would not be possible. Now we’ll go on to look at that fundamental workhorse of the modern electronic world, the oscillator. A previous article discussed resonant circuits.
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