New linear actuators and stepper drivers in Electronics

Added some small linear actuators and StepStick A4988 stepper driver modules to the Electronics area.  These are like the ones you pull out of CD-ROM drives but have an extra 25mm of length to them for a total around 60mm slide length.  Use to make small CNC laser engravers and other like minded projects.  Four wire stepper motors that work well with the standard A4988 modules.  Have your microcontroller of choice move things with 0.01mm accuracy!  In the drawer marked “linear actuators” in Electronics.