Alternative current
In AC, the current moves back and forth with the changing magnetic field.
This is the type of electricity from wall sockets in your home.

Current is a flow of electrons measured in Amperes (Amps,) past in a single point in the circuit within a certain amount of time.

Direct current
In DC, the current travels in only one direction, for example in batteries.

An endstop is a mechanical switch that is put at an end of a given axis so we can detect when we are getting close to an end of a given axis.
There are 6 endstop inputs : Two for each of the three axes.
”You are at the end…STOP!!”

Homing is telling Smoothie to go “seek” an endstop for an axis ( or all of them ). Once it is hit, we know where we are, before we didn't

Limit switches is just using those same endstops to prevent the user from going out of bounds

Smoothie has two types of mosfets : small ones that are capable of running fans or hotends, and big ones that are capable on running beds or hotends

stands for Power Supply Unit
converts mains AC to low-voltage regulated DC power for the internal components of a computer
Brick type PSU
ATX type PSU

Resistance is a restristion to the flows of electrons.Resistance is measured in Ohms.

Universal Serial Bus