I want to make a wire glow using a simple 9V battery. Will a simple resistor prevent this from being a short circuit and safety hazard? How do I decide which resistor to use?
The hazard I am afraid of is an exploding battery. The glowing wire is intentional, and not the hazard I am afraid of.
Best Answer
A disposable cautery pen does just what you need. You can use a piece of nichrome wire 22 gauge or so made into a small loop. You may have to experiment to get the right length for the red glow.