what is a transistor astable multivibrator?

Answer 1

A multivibrator circuit is a circuit that has identical components arranged on the left and right hand sides. In the case of the example below, the two PNP transistors, the capacitors and the LEDs are the key components. This circuit will trigger itself repeatedly and in this way the LEDs flash alternately.

Increasing the value of the two electrolytic capacitors increases the time each LED remains on/off. The transistors are general PNP type. It is important to protect the LEDs and this is achieved by adding the 680R (or lower if necessary) fixed resistors.

Answer 2

you must first know the term multivibrator which i guess u do.
an Astable will remain in 1 of 2 states until a clock pulse is recieves.So there are 2stable states.
with Transistor we talk of saturation and cutoff,typically.
Using mostly the base -biased for transistor switching.

Answer 3

It is an astable multivibrator built with transistors as the active elements.

An astable multivibrator has two states. Both of them are unstable. As a result, the circuit continuously changes state at a rate determined by its' circuit elements.

Also known as an 'oscillator' or 'clock generator'.


Doug

Errmmmm........ Keegan, Dewd.
Bistable. Bi = 2 'flip-flop'
Monostable. Mono = 1 'one-shot'
Astable. A = no or none 'oscillator' or 'clock generator'

Answer 4

i think which you're speaking approximately an exterior transistor related to the 555. it is maximum possibly that the purpose of the transistor is to allow the 555 to alter a device which will draw extra modern-day than the 555 can furnish.

Answer 5

Hi. A circuit based on a transistor which goes from saturation to cutoff and back rapidly.

Answer 6

Well said, Doug, and here is also a basic circuit diagram:
http://www.play-hookey.com/digital/experiments/rtl_astable.html