Friday, August 30, 2013

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741 square wave generator



uA 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 negative tension.C1 now get to unload and reload.New contrast, when the negative voltage drops below that in the C1 3 pin, the circuit is returned quickly for repeats completely positive value.The endless cycle of output.

The square wave frequency can be varied by varying the potentiometer R1.The frequency range of the circuit depends on the value of R3, R4 and C1.

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