In electronic repair, most of the time i came across five band resistor color code. The purpose of using the five colour band resistor in a circuit is that it provide a more accurate value compare to the four color band. For example in order to get the value of 22.6kohm, with four colors band resistor you will not be able to find it. The most you can get is 22k (red,red,orange and gold). If with the five color band you will be able to calculate it (red, red, blue, red, brown)the last color which is brown represent 1% tolerance. You may go to google search engine and type resistor color code, resistor color coding, resistor color code calculator, or resistor color code chart to know more about how to calculate a five band resistor values.
If you open up an analog multimeter you will understand what i mean. Most of the resistor circuit inside the multimeter are using five color band. Why? Because the reading that you get whenever you measure current, voltage or ohm, the panel will show the nearest value. For instance, if you measure a 9v battery the needle will point to may be 8.9v,9v,or 9.1 volt. If that particular multimeter was designed using four color band resistor the result that it gets may be 8.5v,9.5v or even 10 volt. In other words the use of five color band resistor is to make a circuit more precise and output the desire result as what the engineers want it to be.
There's a interesting five color band resistor which is unique. In fact i have already seen quite a number of them. I will reveal the calculation about this unique five color band resistor. The colors are orange, orange, red, gold, white. Actually it is a four color band resistor. Just ignore the white color and proceed to calculate using the four color band formula. As to why the resistor manufacturers add this 'extra' white band i really do not know. However, from forum someone said that it is for the military purposes. If you know the answer i would like you to email me so that i can share with other fellow electronic repairer thru this info repairing newsletter.
Jestine Yong is a electronic repairer and a writer. For more information on electronic repair please visit his website at http://www.noahtec.com/electronic-repai r-articles.htm
It is the most annoying thing when one day you... Read More
The number of different formats available in DVD drives can... Read More
A surge protector [AKA surge suppressor] is an electrical plug-in... Read More
The quick answer is...yes and no.Consider this. How many printer... Read More
IBM boasts a very large array of older and newer... Read More
Have you ever encountered before the problem of having multiple... Read More
Notebook computers are becoming very popular. They seem to be... Read More
What is so important about cables anyway?One of the most... Read More
For Video cards - Most PC video cards these days... Read More
You've laid out good money for your laptop computer, but... Read More
If you've been looking to upgrade your computer video card... Read More
The process of adding USB 2.0 ports took no time... Read More
This is the first step to servicing, upgrading or removing... Read More
Someone recently asked me "I teach senior citizens in a... Read More
Are you getting tired of the high cost of printing?... Read More
IMO, these sd work 'like a VCR' as far as... Read More
CCNA and CCNP candidates hear it all the time: "you... Read More
Getting a new PC is exciting and a pain. It's... Read More
If, for some reason, you can't get an exact replacement... Read More
Throughout the years there have been many technologies involved with... Read More
RFID technology is used frequently today and has been around... Read More
It is true. You can save a lot of time... Read More
Day by day computers are getting advanced. Capacity and performance... Read More
Used laptop computers are everywhere these days. How can you... Read More
The data on your hard drive is the most critical... Read More
Thinking about getting a new computer, but with all the... Read More
Hard Drives: ATA versus SATAThe performance of computer systems has... Read More
It's easy to be intimidated by all the laptop models... Read More
Computing freedom, independence, and mobility don't have to come with... Read More
Even with the popularity of digital technology, and the availability... Read More
Forget about emptying your wallets every time you see the... Read More
Many technicians are confused on how to really read a... Read More
The notebook computer is coming of age. For the first... Read More
Toshiba offers a few of their refurbished laptops in the... Read More
Cleaning a laser printer, fax, or copier of laser toner... Read More
The power coming into a computer is the most critical... Read More
IMO, these sd work 'like a VCR' as far as... Read More
Computers often break down at the worst of all times.... Read More
Throughout the years there have been many technologies involved with... Read More
My mother always told me to dust, but I never... Read More
Keeping Shipping Costs DownWhen shopping for inkjet printer cartridges online... Read More
Hard Drives: ATA versus SATAThe performance of computer systems has... Read More
Data Centers are the core of the Internet. The computer... Read More
As the proud owner of a laptop computer, you'll want... Read More
CD ROMS - If you're adding or removing an internal... Read More
Wow- if you do it first time and have some... Read More
With all the technical terms out there, it is becoming... Read More
There is something good about esr meter because besides electrolytic... Read More
When bought personal DVD player, the very next thing to... Read More
Printers are on-line devices initially categorised as being either impact... Read More
In today's age, building computers on yourself is often chosen... Read More
The other piece of vital equipment to accompany the rack... Read More
The quick answer is...yes and no.Consider this. How many printer... Read More
Current sense resistor is usually located in the switch mode... Read More
To upgrade or not? That is the question. At least,... Read More
High density digital versatile disc is a digital optical media... Read More
Have you noticed that laptop computers are beginning to dictate... Read More
It's easy to be intimidated by all the laptop models... Read More
The following is a list of tips to help safeguard... Read More
Personal asset preventive maintenance software exists to help people manage... Read More
DVD CD ROMs have become predominantly the most used CD... Read More
Digital voice recorders have become increasingly popular over the last... Read More
If you run a small business, chances are you're saving... Read More
You are working at your computer and trying to print... Read More
Data loss is an expensive reality. It's a hard fact... Read More
Testing diodes is different from testing a resistor because you... Read More
Computer Hardware |