The core component of the Solderdoodle is a Weller BP645 Soldering Iron. The heating element is ... Instead, this circuit is added later. [Solarcycle] appears to be using a circuit of his own ...
Seems like the iron is best powered by a USB battery pack, and [BigClive] was able to solder some surprisingly beefy connections that way. The teardown and analysis reveal a circuit that looks ...
The Family Handyman on MSN1mon
A Guide for Soldering Electronics
Identify the circuit you need to connect. Clear a workspace, then clean the tip of your soldering iron with a damp sponge.