Design an IC 555-based symmetrical square wave generator for $1 \mathrm{KHz}$ frequency of $\mathrm{Vcc}=5 \mathrm{~V}$, Draw waveforms for voltage across timing capacitor and output.

Solution:

The circuit used for the square wave generator is shown in fig (a). For a square wave, charging and discharging resistors must be equal.

The resistance $R_1$ is a combination of a fixed resistor and a potentiometer -so that potentiometer can be adjusted for the exact square wave.

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