Every true tech geek worth his or her weight in solder and flux has been foaming at the mouth over a new infomercial on TV. It’s for a device called Cold Heat: a soldering iron that reportedly stays ...

One way you can control the temperature of a soldering iron is with a microcontroller, using temperature feedback from the thermistor in the handle near the iron's tip. This Design Idea presents a ...

Here is a simple but inexpensive inverter for using a small soldering iron (25W, 35W, etc) In the absence of mains supply. It uses eight transistors and a few resistors and capacitors. Transistors Q1 ...