ExpEYES

VI characteristic of PN junctions

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The schematic is wired as shown in the diagram below. The voltage across the diode is measured on A1. The anode of the diode is connected to PV1, through a 1k resistor. Voltage at PV1 is incremented in steps and at each point the voltage across the diode is measured. The current is calculated from i = (PV1-A1)/R. The diode used is 1N4148, silicon diode. The experimental setup and the screenshot are shown below. The results shown are for 1N4148 silicon diode, red and green LEDs.

IC555

IC555 output