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

Explain isolated i/o scheme, Explain isolated I/O scheme. In I/O mapped... Explain isolated I/O scheme. In I/O mapped I/O scheme the addresses allocated to memory locations can also be assigned to I/O devices. Because the same address may be assigned

Describe the magnetic effects of current, 1.   Describe the magnetic effe... 1.   Describe the magnetic effects of current? ( to achieve a pass grade, describe the magnetic effect of current) 2.   Complete the diagram to show the direction of mo

Explain the asynchronous decade counter, Explain the Asynchronous Decade Co... Explain the Asynchronous Decade Counter? The binary counters earlier introduced have two to the power n states. But the counters with states less than this number are as well

Algorithm pseudo code and flow charts , Algorithm  pseudo code and flow  ... Algorithm  pseudo code and flow  charts Algorithm:   before  writing  the program  the programmer must understand  the problem  for which are  program is to  be written. Then

Ammeter, details details

How to submit assignment, help with assignment help with assignment

Basic introduction of analog building blocks, Q. Basic introduction of Anal... Q. Basic introduction of Analog Building Blocks? Electronic systems usually process information in either analog or digital form. In order to process the two different kinds of

Illustrate common emitter configuration, Illustrate Common Emitter configur... Illustrate Common Emitter configuration, current amplification factor and collector amplifier. Describe transistor as an amplifier.

Choose compensating components for the circuit, Q. Figure gives the frequen... Q. Figure gives the frequency-response graphs for a 709 op amp. Choose compensating components for the circuit to have a gain of 100 and a frequency response of up to 100 kHz.

Plug and socket condition -safe conduct, Plug and Socket Condition : In th... Plug and Socket Condition : In the same way that your knowledge of flexes and fuses is wasted if you don't care to ensure that flexes and cables are routed safely and sensibly, so