Schmitt triggers are a signal voltage with hysteresis controlled on/off switch circuit. That means that the output does not switch on and off at a specific signal voltage, but tries to stay in it’s current condition when in between a couple threshold voltages.

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I also added a timed off version of the Schmitt trigger that uses a capacitor and resistor to set the time. A discharging capacitor signal will take time to drop below the voltage needed to turn the transistor off.

Diagram

Video

Electronics course 18 NPN BJT Schmitt Trigger plus capacitor delayed shut off circuits



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A lot of the components that I use are in this diode and transistor semiconductor kit.





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Power supply I use in my videos.

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