555 Timer Astable Multivibrator Circuit Diagram In this 555 astable multivibrator circuit, LED will switch ON and OFF automatically with a particular duration. ON time, OFF time, Frequency etc can be calculated using above formulas. Above figure shows the 555 timer astable multivibrator circuit diagram. You can find a lot of circuits and applications using astable mode in 555 timer circuits. How a monostable multivibrator using IC 555 works let us discuss the working of a monostable multivibrator with the help of its construction, circuit diagram, waveforms, and all other details. Construction of Monostable multivibrator. The following circuit diagram shows a monostable multivibrator using IC 555 in which the pin no. 7 (discharge) and pin no. 6 (threshold) are shorted together.
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