Why spend time etching circuit boards and applying solder masks when all you really need is a rollerball pen and some paper ... a copper trace on a circuit board, making on the fly circuit ...

Yet, that’s exactly what one Hackaday.io user did by building a USB-powered soldering pen with better performance than a $5 Chinese soldering pen. Two buttons control the heat (+/-) and the jack ...

Contact soldering stations use one of the most commonly recognized forms of soldering: a gun or a pen connected to an ... DIYers looking to solder an entire circuit board will find higher wattages ...

My introduction to soldering electronics coincided with ... I bought the necessary equipment, identified the failed circuit on the control board and reconnected it with solder in less than 10 ...