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Electronics
Electronics are a branch of technology and science that deals with the control of the flow of electrons.
3,725 Questions
How to connect 74ls138 with 7 segment?
We cannot connect the 74ls138 straight with a seven segment display; for that we need a 7447(7 segment driver).
Will they ever make a color and touch screen Amazon Kindle?
It is unlikely, as both of those features use additional wattage, thus reducing battery life. One of the most attractive features of e-readers is the ability to run for many hours on a single charge. However, advances in technology may render this question obsolete.
Can you plug an AC computer into a DC plug?
You can plug an AC computer into a DC plug only if you also have an inverter to transform the DC power into the AC power that the computer power supply expects.
Where is the electronic control module for a 1998 Dodge Durango?
Dodge uses what is called a "Powertrain Control Module" or PCM this is located on the PASSENGER SIDE inner fender just behind the air box where your air filter is. It will be aluminum colored and looks like a flat box.
What are the Memory types used in the 8051 microcontroller?
The memory types are : On-Chip Memory, External Code Memory, and External RAM.
On-Chip Memory refers to any memory (Code, RAM, or other) that physically exists on the microcontroller itself. On-chip memory can be of several types, but we'll get into that shortly.
External Code Memory is code (or program) memory that resides off-chip. This is often in the form of an external EPROM.
External RAM is RAM memory that resides off-chip. This is often in the form of standard static RAM or flash RAM.
Code Memory
Code memory is the memory that holds the actual 8051 program that is to be run. This memory is limited to 64K and comes in many shapes and sizes: Code memory may be found on-chip, either burned into the microcontroller as ROM or EPROM. Code may also be stored completelyoff-chip in an external ROM or, more commonly, an external EPROM. Flash RAM is also another popular method of storing a program. Various combinations of these memory types may also be used--that is to say, it is possible to have 4K of code memory on-chip and 64k of code memory off-chip in an EPROM.
When the program is stored on-chip the 64K maximum is often reduced to 4k, 8k, or 16k. This varies depending on the version of the chip that is being used. Each version offers specific capabilities and one of the distinguishing factors from chip to chip is how much ROM/EPROM space the chip has.
However, code memory is most commonly implemented as off-chip EPROM. This is especially true in low-cost development systems and in systems developed by students.
External RAM
As the name suggests, External RAM is any random access memory which is found off-chip. Since the memory is off-chip it is not as flexible in terms of accessing, and is also slower. For example, to increment an Internal RAM location by 1 requires only 1 instruction and 1 instruction cycle. To increment a 1-byte value stored in External RAM requires 4 instructions and 7 instruction cycles. In this case, external memory is 7 times slower!
What External RAM loses in speed and flexibility it gains in quantity. While Internal RAM is limited to 128 bytes (256 bytes with an 8052), the 8051 supports External RAM up to 64K.
On-Chip Memory
As mentioned at the beginning of this chapter, the 8051 includes a certain amount of on-chip memory. On-chip memory is really one of two types: Internal RAM and Special Function Register (SFR) memory.
the 8051 has a bank of 128 bytes of Internal RAM. This Internal RAM is found on-chip on the 8051 so it is the fastest RAM available, and it is also the most flexible in terms of reading, writing, and modifying its contents. Internal RAM is volatile, so when the 8051 is reset this memory is cleared.
The 128 bytes of internal ram is subdivided as shown on the memory map. The first 8 bytes (00h - 07h) are "register bank 0". By manipulating certain SFRs, a program may choose to use register banks 1, 2, or 3. These alternative register banks are located in internal RAM in addresses 08h through 1Fh.
Bit Memory also lives and is part of internal RAM. We'll talk more about bit memory very shortly, but for now just keep in mind that bit memory actually resides in internal RAM, from addresses 20h through 2Fh.
The 80 bytes remaining of Internal RAM, from addresses 30h through 7Fh, may be used by user variables that need to be accessed frequently or at high-speed. This area is also utilized by the microcontroller as a storage area for the operating stack. This fact severely limits the 8051s stack since, as illustrated in the memory map, the area reserved for the stack is only 80 bytes--and usually it is less since this 80 bytes has to be shared between the stack and user variables.
How do you make cash recycling a laptop?
You have to have a certain place for recycling things like that. They will pay you to do that, because it keeps alot of waste out of landfills. You should be listening for advertisments that will provide that kind of service, or use a phone book.
Various different companies do so. See related links for some.
Is the Apple Clamshell G3 worth buying?
yes it is, any product made by apple is great for use and is unique!!
A piezo pickup is the type of pickup most commonly used in acoustic-electric instruments. This type of pickup is normally placed in or near the bridge of the instrument thus making it a piezo bridge.
most likely it does mean he likes you, otherwise it might just mean that you are a special friend to him.unless the things the guy was texting were against you.
What is ES damage of computer components?
ES stands for "Electric Static". When there is static around a component, a short current runs through it. However, when the static discharge is removed, it causes corruption or data loss just like what would happen if you force your PC to shut down.
CCQ: This is an index of which evaluates the wireless Client Connection Quality.
Laptops are smaller and porable versions of computer. It is using by profeassional students and simple person or any person it mean it is used by those person which need computers while they are roaming around several places for there work or whatever etc.
you hook it to your tv using the colored chords to match them and then keep trying you may have to try a few times to get it right.
What is a freeze on a computer?
When a computer "freezes" it becomes unresponsive to your input. This usually happens when an error occurs and the application crashes, but the screen doesn't go back the desktop.
Another way computers freeze is when they ironically overheat, which disables the function of some of the hardware in the computer.
Digital Electronics deals with logic 1 and logic 0, where logic 1 is represented by one voltage and logic is represented by another voltage.(ie. it is a discrete representaiton of analog signals). The main advantage of digital signals over analog signal is that it is less prone to noise.
How do you find twos compliment of 00h in 8085 program?
You find the two's complement of 00H the same way you find it for any other number. You complement the bits and then you add 1. In the case of 00H, this results in 00H. That is no surprise, because -0 is the same as +0, and two's complement representation was chosen to do just that, as well as to make the physical addition of signed and unsigned numbers to be the same.
Does the Ce mark on electronics mean that no lead solder was used in its production?
No... The CE mark on electronics products simply means that it conforms to European Union directives concerning the manufacture of equipment. The mark is recognition that the product meets all of the European legislation. CE is an abbreviation of the words "Conformité Européenne".
Why don't cameras take round pictures?
Some might do - depends on what camera or settings they have.
There are some that can. While the lens produces a circular image, it was easier to fit square or rectangular images onto a strip of film. A 35mm lens used on a large format (5x4 inch or 8x10 inch) sheet film will indeed produce a circular image in the middle of the plate. It's a criminal waste of film, though.
Applied electronics and instrumentation?
Applied Electronics and Instrumentation are subjects for applied engineering. It is a combination of Electronics and Instrumentation Engineering. The course has a great scope and is offered by many universities.
What exactly does wide viewing angle 3D mean?
Wide viewing angle 3D means that you can enjoy a great 3D experience no matter where you are watching the TV set from or what position you're in.
On a LED which leg is longer - positive or negative?
L.E.D has one leg longer then the other one, the longer one is positive and the smaller one is negative. If you have a l.e.d which has same length of legs then look inside the l.e.d for two kind of triangle peices and one of them will be smaller which is positive and one which is bigger and is negative.
