• What is the Electronics Forum?
• What are the Forum Guidelines?
• Can I submit an entry for the FAQ?

(back)This is the forum for electronics hobbyists, either novice or expert, discussing equipment tinkering, building, and repair. Share experiences, tips, and tricks through the fast paced ever-changing world of electronics.

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by Macy

(back)Forum Guidelines
Please follow these guidelines not only for your first post, but for all subsequent posts as well.

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Please utilize the "Hey Mods" link at the bottom of any post for anything requiring Mod attention.
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by Macy

(back)Absolutely! The Electronics Forum FAQ is a work in progress and we encourage and welcome suggestions and comments. To make comments on an already existing FAQ entry, click on the "business card" at the bottom of the entry you wish to comment on. This will generate an Instant Message screen where you can send your comments directly to the FAQ author.
You may suggest a FAQ entry by going Here. This link can also be found at the bottom of the FAQ index page. If you submit a question and a proposed answer, it will be reviewed and edited as necessary. If it's considered a helpful addition, it will be added.

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• What is Ohms Law?
• Where can I find Ohms Law calculators?
• Where can I find Circuit Analysis tools?
• How to read Resistor Color Codes?
• Where can I purchase parts?
• Where can I find Printed Circuit Board Fabricators

(back)Ohm's Law defines the relationships between (P) power, (E) voltage, (I) current, and (R) resistance. One ohm is the resistance value through which one volt will maintain a current of one ampere.

•( I ) Current is what flows in a wire or conductor like water flowing through a pipe. Current is measured in (A) amperes or amps.

•( E ) Voltage is the difference in electrical potential between two points in a circuit. It's the push or pressure behind current flow through a circuit, and is measured in (V) volts.

•( R ) Resistance determines how much current will flow through a component. Resistors are used to control voltage and current levels. A very high resistance allows a small amount of current to flow. A very low resistance allows a large amount of current to flow. Resistance is measured in ohms.

•( P ) Power is the amount of current times the voltage level at a given point measured in wattage or watts.

The relationships of Current, Voltage, Resistance, and Power are given here:




A great example provided by Jason can be found Here

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by Macy edited by Riss_Centaur
last modified: 2006-02-06 18:38:22

(back)You can find several calculators online, a few examples can be found at
The 12Volt.com
Electrician.com
MCsquared.com
CrownAudio.com
You can find many other useful calculators at 101Science.com

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by Macy

(back) rockotman suggested a demo download from Orcad that allows you to run their software to do layouts and analysis.

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by Macy

(back)There is a good link at Xtronics and another from Samengstrom.com.
DannyG.com offers a nice little calculator to find Resistor Values from color codes.

Resistor Color Codes are also being discussed Here.




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by Macy
last modified: 2006-02-07 11:20:19

(back)You can find a list of resources recommended by our forum members Parts, Parts!.

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by Macy

(back)Some of our members posted several links where you may obtain printed circuit board fabricators, you can find that list here »Printed Circuit Board Fabricators .

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by Macy

(back)Here are a few links that you may find useful:

ifigure.com has a whole list of great links.
Free Electronic Circuits
»www.national.com/rap/

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