There is no such thing as a circuit that says a voltage is zero. You can build a detector that has a Boolean output X = V ≥ -Δ, and another Y = V ≤ Δ. Let Z=X AND Y. That means that Z is true ifHow can I eliminate those other impulses expect the one when the voltage is 0V?
I am trying to make some current limiter for my power supply, because it doesn’t have any....I want the drop down voltage of the output resistor to compare with other voltage given from other power supply (made with resistors, and potentiometers) and when the voltage is the same, or when it will pass some limit to trigger transistor, and that transistor to trigger NE555 and it needs to trigger one relay.....or maybe I will wont make it with NE555.... You understand what I mean??Might be helpful if you tell us exactly what that "something" is you're trying to build.