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555 timer

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In this post we will be discussing about the op-amp as a comparator.We have already discussed other applications of the op-amp in rectangular wave form generator circuits like astable…

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A voltage-controlled oscillator (VCO) using the timer 555 is shown in figure. The circuit is sometimes called a voltage-to-frequency converter because the output frequency can be changed by…

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The 555 timer combines a relaxation oscillator, two comparators, an R-S flip-flop, and a discharge capacitor. R-S Flip-Flop. A pair of cross-coupled transistors is shown in figure.…

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