motor speed :a DC motor delivers full power and full torque at high speeds. as the speed is reduced, the power drops off.a stepper delivers maximum power at it's lowest speeds and as speed increases, power drops off.each type of motor has applications that they are best suited for.
but considering the limited space and the capacity of the newbie to grasp the concepts, it is at exactly the right level. a good idea and pretty well executed.
It is apparent that the writer does not like the L298 boards that so many newbies have and ask about. I would offer that more technical discussion would be called for. It appears to me that the section about them is dismissive.....SNIP....IMHO, it would be appropriate to remove the writers (negative) evaluation of the board and be more technical.
I'm just missing a more detailed description, how to connect a unknown stepper to a driver board.
Describe how a ohm-meter can be used to find out which are the ends/centers of a coil and if it makes a difference which way you connect a coil to the driver. A newbee might be confused which coil is A or B and which end of the coil is A1 or A2,
These can be made to control a stepper motor but they are a very poor choice - mainly because they have no method for limiting the current and therefore cannot use high voltages.
reading the data sheet is in order.the L298 certainly does have limiting resistors and many of the available boards on the market have them out to pins. the vast majority of the super-cheap e-bay ones are set for full power,.