How do you use resistors?

Dr. KillGood · Post by **Dr. KillGood** » Fri Mar 28, 2008 7:30 pm

How do you know what they are resisting? Like what is a OHM?

How do you know how many and which ones to use?

Sharp Sapphire · Post by **Sharp Sapphire** » Fri Mar 28, 2008 7:44 pm

V=i/ohms

V=voltage
i=current
ohms = ohms

ohms=i/v

Dr. KillGood · Post by **Dr. KillGood** » Fri Mar 28, 2008 8:03 pm

Thanks, you confused me even more!

Sharp Sapphire · Post by **Sharp Sapphire** » Fri Mar 28, 2008 8:47 pm

mission accomplished.

If your resistors are resistign anything other than voltage it prolly woldn't work on a electronic, so i'd say they are resisting voltage.. hmmm

To figure out how many ohms you need to use, use the formula i provided.

Tibia · Post by **Tibia** » Fri Mar 28, 2008 9:54 pm

When you get them from Radio Shak, the packages have a chart on the back that explains the color band code. That will tell you your resistance in ohms, as well as the degree of variance. You could also google some kind of chart, as well.

Dr. KillGood · Post by **Dr. KillGood** » Fri Mar 28, 2008 10:32 pm

So like...

1.00 volt = ?.?? OHMS

Website · Post by **Life of Brian** » Fri Mar 28, 2008 11:32 pm

Google it. Buy a book. Take a physics class. Go to wikipedia. Come on, man.

nitro2k01 · Post by **nitro2k01** » Sat Mar 29, 2008 4:05 am

How you're supposed to use them depends on what you want to do. Now, does that make any sense?

codeman · Post by **codeman** » Sat Mar 29, 2008 6:50 am

Sharp Sapphire wrote:V=i/ohms

V=voltage
i=current
ohms = ohms

ohms=i/v

umm.....nope. You got it backwards!

V = i*R
so
R = V/i (R is ohms)

Dr. KillGood · Post by **Dr. KillGood** » Sat Mar 29, 2008 10:14 am

codeman wrote:
Sharp Sapphire wrote:V=i/ohms

V=voltage
i=current
ohms = ohms

ohms=i/v
umm.....nope. You got it backwards!

V = i*R
so
R = V/i (R is ohms)

DAMMIT NOW I AM EVEN MORE CONFUSED!

Curse you!

Also if we all googled EVERYTHING then why would we have a forum at all!?

codeman · Post by **codeman** » Sat Mar 29, 2008 5:01 pm

Because there are some things that google doesn't do a good job of explaining. It does a very good job with simple electronics, better than a forum could

17daysolderthannes · Post by **17daysolderthannes** » Sat Mar 29, 2008 7:58 pm

an ohm is just a unit of resistance. The best way to explain it is actually with the formula: V=IR conveniently known as "Ohm's Law." This formula states that Voltage is equal to the Current times Resistance. Current is basically the amount of little electrons moving through the wire and Voltage is the electrical "pressure." I didn't get it until my Circuits book used a water flow analogy. Voltage is like pressure, i.e. a super soaker or fire hose would be high voltage and a dripping faucet would be low voltage. Current is like the water current flowing through the pipe. Finally, Resistance is actually more relatable to the diameter of the pipe. If you turn on a garden hose and don't alter the flow rate (don't mess with the valve once you turn it on) and then put your finger partially over the end you create a makeshift nozzle effect and the water goes farther. Reducing the output area of the hose is the same as increasing the resistance in an electrical circuit.

I hope I said this right, my circuits class covered very little in true concept, instead he just had us work a bunch of dick problems that are used in the real world .00001% of the time.

Website · Post by **Life of Brian** » Sun Mar 30, 2008 12:24 am

Dr. KillGood wrote:Also if we all googled EVERYTHING then why would we have a forum at all!?

Portablizing is one thing, basic electronics knowledge is another. For example, if someone is needing help thinking through how best to set up batteries for their portable, okay, that's what this place is for. If someone were to come here asking what a Super Nintendo is then he'd sound silly, right? This is information that one could find within one minute of searching.

http://en.wikipedia.org/wiki/Resistor

http://en.wikipedia.org/wiki/Electrical_resistance

http://www.bcae1.com/resistrs.htm

http://www.sxlist.com/images/www/hobby_ ... sistor.htm

http://www.satcure-focus.com/tutor/page2.htm

http://www.doctronics.co.uk/resistor.htm

http://www.the12volt.com/resistors/resistors.asp

http://www.kpsec.freeuk.com/components/resist.htm

http://www.uoguelph.ca/~antoon/gadgets/ ... sistor.htm

And BAM! My one minute of searching is up.

Kurt_ · Post by **Kurt_** » Sun Mar 30, 2008 12:44 am

So...WHAT is a resistor? And HOW do I use it? Can *I* use one differently than you did? Does it resist forces like gravity? If it can resist gravity, wouldn't it be, like, anti-gravity? Anti-gravity devices are used in everyday electronics and nobody knows about it yet? Government conspiracy??? They're out to get us all! One day they're gonna turn all the resistors on at once, and we'll all float away, leaving the rich people to have Earth and the poor people with resistors to travel the Universe and a renegade band of Galactic Nomads.

Oh my...

Website · Post by **Life of Brian** » Sun Mar 30, 2008 12:50 am

Kurt_ wrote:So...WHAT is a resistor? And HOW do I use it? Can *I* use one differently than you did? Does it resist forces like gravity? If it can resist gravity, wouldn't it be, like, anti-gravity? Anti-gravity devices are used in everyday electronics and nobody knows about it yet? Government conspiracy??? They're out to get us all! One day they're gonna turn all the resistors on at once, and we'll all float away, leaving the rich people to have Earth and the poor people with resistors to travel the Universe and a renegade band of Galactic Nomads.

Oh my...

How dare you turn this pointless thread into something awesome?