An electronic oscillator is an electronic circuit that produces a periodic, oscillating electronic signal, often a sine wave or a square wave. Oscillators convert direct current (DC) from a power supply to an alternating current signal.
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The biosphere is the basis of the study of ecology, or the study of life, in which scientists like to study things such as primary producers, which are found at the bottom of food webs, they are good indicators of where other forms of life can be found.