Current-Limited LED Indicator

Application

This circuit shows the LED as a current-limited status indicator powered from a 5 V rail.

Schematic Organization

The source is on the left, the current-limit resistor is in the top branch, and the featured LED is the right-side vertical branch to the shared return. Voltage and current probes make the LED operating point visible.

Expected Behavior

With VIN at 5 V and RLIM at 680 ohm, the LED should be forward biased and the branch current should exceed the 5 mA on-current threshold used by the dynamic symbol.

Suggested Experiments

Change RLIM to 1K or 330 and rerun the operating point. Compare the LED current and the visual state of the LED symbol.

Featured Component

The featured component includes a simulation-driven indicator state, so the symbol can light when current through the LED exceeds the On current setting.