Joule Thief

[poynt99]

but what exactly have i measured here
is this what any cicuit would have to run on or is this what the resistor was using?

Do yourself a big favor, and learn Ohm's law.

You have measured the "circuit current", I. When you insert the meter, it completes the circuit, and...

I = V/R

.99

[dasimpson]

Do yourself a big favor, and learn Ohm's law.

You have measured the "circuit current", I. When you insert the meter, it completes the circuit, and...

I = V/R

.99

i know ohms law i know that if you measure the voltage of the resister in a circut you then devide the voltage reading by the resistnce to get the current usage but i used a restser and mesured the ampage not voltage

[poynt99]

i know ohms law i know that if you measure the voltage of the resister in a circut you then devide the voltage reading by the resistnce to get the current usage but i used a restser and mesured the ampage not voltage

Alright, then perhaps the basics of using a meter is in order.

When measuring voltage (and meter is set to "voltage"), the meter leads are in "parallel" with your circuit.

When measuring current (and the meter is set to "current"), the meter leads are in "series" with your circuit.

.99

[poynt99]

Study this:
http://www.electronics-radio.com/articles/test-methods/meters/how-to-measure-current.php

.99

[dasimpson]

Study this:
http://www.electronics-radio.com/articles/test-methods/meters/how-to-measure-current.php

.99

i know how to use a meter but you still dont understand what i am asking

ok here it is i have a battery then a resister does the risiter limit the current the circuit can use example say the battery can give 1000ma but i only wont 1 ma would a resister do this?