I'm really new to electronics, so please bear with me and this newbie question.
I have a simple circuit, two AA batteries a tactile switch and a led. I have noticed the AA batteries heat up.
So my question is. Is it common practice to add a resistor to a circuit? and if so, how do I know what size resistor I should use ?
I have a simple circuit, two AA batteries a tactile switch and a led. I have noticed the AA batteries heat up.
So my question is. Is it common practice to add a resistor to a circuit? and if so, how do I know what size resistor I should use ?