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Electronic Lab - IC-555 Timer


5. IC-555 Timer

Introduction


The 555 timer IC was first introduced around 1971 by the Signetics Corporation as the SE555/NE555 and was called the "IC Time Machine". It was the very first, and for a long time, the only commercial timer IC available. It operates in three modes: Astable oscillating, monostable one-shot, and monostable delay-on.

Astable (oscillating)

Monostable (One-Shot)

Monostable (Delay-On)

 

 
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