What is the formula for figuring out how much resistance some needs will give an example
Lets say one has a LED which is rated for 1.5 volts and it is powered by 9 volt battier but it blows every time how does one figure how much resistant is needed to keep the led from blowing.
Lets say one has a LED which is rated for 1.5 volts and it is powered by 9 volt battier but it blows every time how does one figure how much resistant is needed to keep the led from blowing.