Analog Closed Loop Controlled Soldering Station


    An analog soldering station with a controller based on an lm324 op-amp.

    Schematic

    Introduction

    I have been using a cheap, variable power soldering iron for my electronics projects. I bought it when I didn't know if I would continue with the electronics hobby, and it has been very useful ever sice …

    ATTINY binary watch


    A binary watch made with an ATTINY13, a DS1302, and programmed using Arduino. Source code is on GitHub.

    It's based on the RandomWatch schematics made by the people at RANDOM DATA.

    Schematic

    Pressing the button shows the time for some seconds (minutes on the left and hours on the right), then …