Question: ANSWER PART B Q3. [20 marks] For the interface circuit shown, each LED (that is ON) in the 7-segment display is to be driven with

ANSWER PART B ANSWER PART B Q3. [20 marks] For the interface circuit shown, each LED (that is ON) in the 7-segment display is to be driven with a 7.5 mA current and is replaced with a short circuit.

Q3. [20 marks] For the interface circuit shown, each LED (that is ON) in the 7-segment display is to be driven with a 7.5 mA current and is replaced with a short circuit. Assume that logic 1 corresponds to a 5 V at the output pin of the microcontroller, B = 100 for the BJT, and that when it is ON, VCE = 0.2 V. a. [10 marks] What value would you choose for R? b. [10 marks] What value would you choose for R. (If the available options are 5 , 7 , and 9 )? R Microcontroller G DP D o Ri 1 + VCE

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