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555 TIMER INTEGRATED CIRCUIT? 555 TIMER IS AN IC(INTEGRATED CIRCUIT) USED AS A TIMER ,PULSE GENERATOR AND OSCILLATOR. TYPES: 1-MONOSTABLE 2-BISTABLE ASTABLE 3-ASTABLE 555 TIMER IC HAS 8 PIN IN NE555 AND

Transistor is a semiconductor device that be used as switching device and amplification device .types of transistors are bjt and fet.fet has more two types jfet and mosfet.in bjt both majority and minority

555定时器集成电路？ 555 TIMER是用作计时器，脉冲发生器和振荡器的IC（集成电路）。 类型： 1-单稳态 2-双稳态 3稳定 555定时器IC在NE555中具有8针，在556 ETC中具有14针 单稳态：具有一个稳定状态 状态：具有不稳定状态。 双稳态：具有两种稳定状态 BISTABLE可以用作翻转触发器。

THE DEFINITION OF ALTERNATOR IS: "ALTERNATOR IS AN ELECTROMACHANICAL DEVICE .THE PURPOSE OF THIS DEVICE IS TO CONVERT MECHANICAL ENERGY IN TO ELECTRICAL ENERGY IN THE FORM OF ALTERNATING CURRENT."