555 timer as a hysteretic controller 2013-01-17

The 555 timer IC is often used to provide flexible astable oscillators and monostable timers. The IC is also capable of operating as a bistable latch which is used for the following example circuits.

The purpose of this article is to show the 555 timer IC used in its bistable mode as a hysteretic controller. The Threshold input is used to latch the output low while the Trigger input is used to latch the output high. Two example circuits are shown: one is a Low Voltage Disconnect (LVD), while...

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