Make this Astable Multivibrator Blinker Circuit Using NAND Gates


Posted on Feb 6, 2014

An astable multivibrator is referred to an electronic configuration which is able to generate continuous alternate high and low pulses from a couple of outputs, operating in tandem. The IC 4093 basically consists of four individual NAND gates in one package, these are schmitt trigger types, which means the gates provide some sort of hysteresis at


Make this Astable Multivibrator Blinker Circuit Using NAND Gates
Click here to download the full size of the above Circuit.

their outputs in response to the input signals. In the figure, gate N1 and the associated passive parts R3 and C1 form the basic oscillator stage. The output of N1 generates alternate square wave pulses at its output having fixed mark and space ratio. The pulses generated at the output of N1 is fed to the input of the next NAND gate, which is wired up as an inverter by shorting its input pins. Note that basically the inputs of all the gates are short circuited, thus they all behave as inverters here. The outputs of these gates are able to support LEDs directly at their outputs, so we connect a few of the LEDs at their outputs which dance or blink in response to the astable pulses.




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