DIY soldering iron thermostat, so that ordinary soldering iron into a temperature-adjustable iron to save dozens of dollars DIY電烙鐵調溫器，讓普通電烙鐵變成可調溫電烙鐵省下幾十元

DIY soldering iron thermostat, so that ordinary soldering iron into a temperature-adjustable iron to save dozens of dollars
Materials: a dimming speed module, a soldering iron, a power line, a 2-hole socket, a shell