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LED Test Circuit Using the Oscilloscope (MSB079E)

LEDs are diodes and can be tested with a simple configuration that allows the display of its characteristic curve in a oscilloscope. The circuit to make this simulation is given by figure 1. The signal source is a transformer powered from the AC power line. Figure 1 shows the circuit.

 

Figure 1 – Circuit  for LED test
Figure 1 – Circuit for LED test

 

The characteristic curve is observed in the virtual oscilloscope of the MultiSIM as given in figure 2. Observe the time base adjustment A/B.

 

Figure 2 – Characteristic displayed by the oscilloscope
Figure 2 – Characteristic displayed by the oscilloscope

 

 

Download the simulation files and Netlist - click here (msb0079.zip)