 JasonLook ma, No brainsPremium,Mod
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Re: Ideas, Suggestions... FAQ entry:
Ohms Law.
Voltage devided by Current times Resistance (E/I X R) Where Voltage is "E"(also "V" can be used), Current is "I", and resistance is "R"
If a circuit is 12V, 2A, then (E/I, or 12/2) the resistance is 6 Ohms.
Conversly, if a circuit is 1A, and 5 Ohms of resistance, then (I X R, or 1 X 5) the Voltage is 5V.
One example of a practical application, is figuring out a current limiting resistor needed for a LED.
Say, you have 12V (A car power system, for instance) and a bright, shiny new Blue LED you want to put in the dash. On the package, the LEDs current is rated at 20mA (0.020A)
So, We have 12V, and need only 0.02A, so E=12, I=.02, E/I, or 12/.02 = 600. Your LED would require a 600 Ohm resistor, to run on 12V. Lower than 600, and the LED will be overdriven, leading to premature failure.
Maybe someone has some good links to online Ohms law, and Watts law calcs?
-Jason
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 usa2kBlessedPremium,MVM
join:2003-01-26
Canton, MI
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1 edit | Re: Ideas, Suggestions..... Here is a good link to good links 
»www.ifigure.com/engineer/electri···tric.htm
Google is my friend!
Maybe here too »www.101science.com/101_calculati···culators |
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 rowd
join:2000-09-06
Chicago Heights, IL | reply to Jason
Re: Ideas, Suggestions... Go here.....
»hyperphysics.phy-astr.gsu.edu/hb···ame.html
»hyperphysics.phy-astr.gsu.edu/hb···ame.html
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shezamsMy Other Car Is A ZamboniPremium
join:2001-08-14
Hyattsville, MD | I like these two sites for learning about electricity and electronics since I am still learning. »www.bcae1.com is presented as car audio electronics but he is very broad in his scope and has much detail with clear explanations. Kudos to the site even though I am okay with the stock radio in my Ford Escort. I also like »www.falstad.com/circuit/
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 The MonkeyI like bananasPremium
join:2000-10-08
New York, NY | Gang,
Here's a terrific site for audio DIY/electronics: »www.tangentsoft.net/audio
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