I made these resistance soldering tweezers. It runs on 12VDC from a computer power supply. Electrodes made from pencil graphite and brass rods.
In this video, I’m soldering wires to a potentiometer to eventually go to a PWM power control for the tweezers.
Sorry about the poor video quality. My video camera can not do quite that close-up.
Post time: Jul-01-2017