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Problem 6: Figure 6: Current-Voltage Characteristic for Light-Emitting Diode. Figure 6 represents the current-voltage characteristic for the...

Problem 6:

Figure 6: Current-Voltage Characteristic for Light-Emitting Diode.

Figure 6 represents the current-voltage characteristic for the Light-Emitting Diode (LED) used in the lab. The objective is to interface this LED to one of the digital outputs on the Arduino Leonardo board (denoted by D10). Assume that a logic "1" (i.e., "high) on output pin D10 corresponds to a nominal voltage of 3.1 volts and that the board is capable of delivering sufficient current to the LED.

a) Sketch a circuit that will deliver exactly 4 mA to the LED when output pin D10 is set to logic "1". Clearly label the pin D10, the LED, and the other components in you circuit. Be sure and specify all resistor values.

b) Plot the load line on Figure 6 for current limiting resistor of 600Ω and determine the current through the LED. Assume that a logic "1" (i.e., "high) on output pin D10 corresponds to a nominal voltage of 3.1 volts. Note that Figure 6 above is available oo the course Moodle page as an Excel file.

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