Demonstrates the three basic multivibrator oscillator circuits - the monostable, the bistable and the astable. Multivibrator circuits are everywhere in modern electronics. Uses LEDs to demonstrate each one. Full documentation enclosed.
Oscillators are everywhere in electronics.ﾠ They are a basic building block upon which the whole structure of electronics and computers is based.ﾠ This kit looks at the 3 basic types of multivibrators.ﾠ They are designed to have zero, one or two stable states; the astable (the prefix "a" means "not") or free running MV, the monostable MV (also called the one-shot) and the flip-flop or bistable ("Bi" means 2, bistable means 2 stable states.)ﾠ In the flip-flop MV a trigger pulse or control signal is required to change from one state to the other. ﾠ MV's use regenerative (positive) feedback; the active components present within the circuit operate as switches being alternately cutoff or driven into saturation. ﾠ These circuits have now largely been replaced by timer IC's like the 555. ﾠ However, a basic understanding of them is still essential since they are still used in many circuits.
This kit builds each of these three circuits and allows you to experiment with them. ﾠ To understand how these circuits work will also make sure you have an understanding of resistors, capacitors, RC characteristics, the transistor as a switch and the light emitting diode (LED).
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