search control: FTF input to FT output

[Bartb0]

Hi everybody,

I need a control that can change its output from False to True and remain true if the input changes from false to true and back to false again.

preferably with a resetbutton to change the output equal to the input.

Is there a single control for this? I could not find it...

Thanks in advance,

Bart

[altenbach]

Just use a feedback node and OR the current and previous values.

(Since you are talking about a control, what do you mean by "input changes"? Do you mean if somebody changes the control?)

[RobAfton]

This just sounds like you want a boolean in a shift register that gets OR'd with an input.

The OR will give you the latching True functionality that you're looking for. Then you can use another input for the reset functionality.

Something like this?

[altenbach]

Here's what I had in mind. There are many ways to do that.