Astable multivibrator using op amp Astable multivibrator is an electronic device which can continuously shift between its two states with respect to the output. If the output corresponding to one particular state is high, then the output corresponding to the other state is low. This nature of the circuit is useful in producing continuous output…
Astable mode by NAND gate
Astable Multivibrators are a type of “free running oscillator” that have no permanent “Meta” or “Steady” state but are continuously changing from one state [[wysiwyg_imageupload::]]”LOW” to the other state “HIGH” and then back again to its original state.This continuous switching action from “HIGH” to “LOW” and “LOW” to “HIGH” produces a continuous square wave output which has been shown in this electronics project. The circuit based project uses IC 7400, which has four inbuilt NAND gates. The two NAND gates along with a capacitor(C) and resistor(R) are connected as shown in the figure. Suppose that initially the output from the second gate U2 is high, the input must therefore be low, as will be the output from the first NAND gate U1. The capacitor now charges up at a rate determined by the time constant of R and C. Read on more to find out how the circuit is made and how it works.