You are asked to design a circuit that indicates if a 12 V battery has been connected the correct way around to two terminals, A and B. To do this, you have chosen to use a special kind of diode known as a LED.

A green LED will light to indicate the battery is connected using the correct orientation (positive to terminal A, negative to terminal B) and a red LED will light to show an incorrect connection (negative to terminal A and positive to terminal B).

A LED acts in a similar way to a rectifier diode, it lets current flow from the anode to the cathode, but blocks current from flowing from the cathode to the anode. When current is allowed to flow, the LED will also light up.

However, unlike a rectifier diode, which has a 0.6 - 0.8 volt drop across it when conducting, a LED typically has 2.5 volts drop. Too much current flowing through a LED can damage it; your circuit needs to limit the amount of current flowing through any LED used. After reading the specification sheet from your LED's supplier, you have found that to achieve a sufficient brightness without damaging the LED, a green LED should have 30mA flowing through it while a red LED should have 45mA.

Design the circuit and include all calculations necessary to show why you selected specific components. Draw your circuit twice, once for the correct connection of the battery and once for the incorrect connection. For each case, clearly show the voltage across each component and the current in each branch.

Posted Date: 2/28/2013 1:51:24 AM | Location : United States

Ask an Expert

Related Discussions:- Design a circuit for indicate the connection of a battery, Assignment Help, Ask Question on Design a circuit for indicate the connection of a battery, Get Answer, Expert's Help, Design a circuit for indicate the connection of a battery Discussions

Write discussion on Design a circuit for indicate the connection of a battery
Your posts are moderated

Write your message here..

Related Questions

What are the application specific instruction processors, What are the appl... What are the application specific instruction processors? Single purpose processor or ASIP (Application Specific Instruction processor) a. Floating point Coprocessor and Gra

What is active window, The present window that is being used. The present window that is being used.

find the thevenin and norton equivalent circuits, The output port of the o... The output port of the one-port is defined by terminals A and B. Given: R 1 = 10 k_, R 2 = 20 k_, R 3 = 10 k_, and R 4 = 10 k_ V 1 = 20 V and I1 = 0.8 mA a) Find the T

How clock signal is generated in 8086, How clock signal is generated in 808... How clock signal is generated in 8086?what is the maximum internal clock frequency of 8086? Clock input 33% square wave from external clock generator .the external clock genera

Wien bridge oscillator, example example

Evaluate phase difference between voltage and current, Evaluate Phase diffe... Evaluate Phase difference between voltage and current: An inductive coil of reactance 15.7 Ω and resistance 32 Ω is connected in series with a capacitor of reactance 79.5 Ω. T

Programming in c and data structure, algorithm for Reversing the digits of ... algorithm for Reversing the digits of an integer

Merits and demerits of voltage divider bias, Merits and Demerits of Voltage... Merits and Demerits of Voltage divider bias: Merits: 1. Not like the above circuits, only one dc supply is essential. 2. Operating point is approximately independent o

Draw the logic diagram of an sr latch, Q. Draw the logic diagram of an SR l... Q. Draw the logic diagram of an SR latch using only NAND gates, and obtain the truth table for that implementation.

Field Service Enginer, Give three reasons why a chamfer shouldn''t an "unim... Give three reasons why a chamfer shouldn''t an "unimportant" dimension