I am a new member and beginner in electronics so please be gentle with me.

I am really struggling to understand ohms law when it comes to finding what resistors I would need for a simple NOT gate to light a resistor.

I know the equation I need is R = V/I but after reading a lot of stuff on here and from around other sites I am not sure what else I need.

I have a 9v battery, 1 bc547c transistor and 1 5mm LED.

My main problem is all the different terminology that I don't understand. If someone could explain or point me in the right direction as to where I would get the other figures for the formula I would be very greatful.

Sorry for the long post and thanks in advance for any help.

Thanks

gareth