The car cigarette lighter socket does not only light cigarettes, but can be utilized as an electrical channel for powering tools to work on the car such as laptops and other electronic devices. The ...
I made one power supply from an atx of an old computed. It had different fixed voltages (12, 5, 3.3V) and a variable output (12-0 V) made with the typical LM317 circuit. It does the work, but there ...