Below is a list of writeups I have done to explain electrical conepts in a hopefully coherent and understandable manner
Please do not go poking around in the branches, many of them are under development and may contain incomplete or incorrect information
An explanation of how low-side switching works. Low-side switching is the most common way of switching electrical devices connected to 3d printer mainboards
An explanation of the common methods of reducing light flickering resulting from switching a mains powered 3d printer bed.