RESISTOR SOLDERING IRON (DC 5V)
Here is how a soldering iron can be made with a 10 ohms 1/4 watts resistor. 5v dc adapter used as the power source. Good to solder wire joints and non-sensitive items. since the leakage of current, it is not good to solder sensitive electronic items. Warning: Do not try this if you are not familiar with electricity and related works. It can catch fire if you make mistakes. The author is not responsible for any damage or injury.