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741 square wave generator



A square wave generator with IC UA741 range shown here.The circuit uses positive feedback to the Schmitt trigger action and negative feedback to measure the time of the waveform.

Let's assume that the output is high and the C1 capacitor is fully discharged.C1 now get to charge through R1 and R2 C1.When the voltage rises above the junction of R3 and R4, the output changes quickly entirely

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