Answered: LEDs (Light Emitting Diodes) conduct…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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LEDs (Light Emitting Diodes) conduct electricity in only one direction. A white LED tends to
have a voltage of 3.5, red 1.8 volts, blue 3.6 volts, and 2.1 volts for a green, orange or yellow LED.
(a) You are to design a circuit comprising of 10 RED LEDs that can be powered up by a 12 V
battery. Choose series/parallel combinations of LEDs and appropriate resistors.
Note: You have to draw the complete circuit diagram showing the configuration including
battery, all LEDs and resistors (with standard values only) and the power rating of each
resistor used.

(b) Repeat part (a) if you have only BLUE lights in the circuit.
(c) How will your design of part (a) change if you have different color LEDs (3 Red, 5 Blue,
One Green and One Orange LED)?
(d) Repeat part (c) if you have 230 V AC power instead of 12 V DC

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