Here is a simple 12 V 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 T1 and T2 ...

If you have a keen interest in electronics or are a do-it-yourself enthusiast, you absolutely need to have a few tools and accessories at your disposal at all times. One of them is a soldering iron.

Soldering is an important skill for anybody who wants to put together circuit boards, play around with Arduino setups, or work on almost any type of electrical project. When first beginning, however, ...