SMARS LC (Lowest Cost) Stackable Module, Optional 2x 18650 battery holder

thingiverse

I printed this and it works as designed, minus the stepper board slides being a little too loose. Please stay-tuned for an update that will make this even more stackable. This module is designed to be infinitely (within reason) stackable to provide free space. The bottom slot should hold two of the controllers for stepper motors for the SMARS stepper motor version, while the Arduino Uno goes in the top and the battery goes...well, we're still figuring that out. The dimensions of the two square controllers for the stepper motors are: 35.3mm x 31.3mm, so the bottom slot is supposed to hold two of those - haven't printed to test yet. Because the 28BYJ-48 on Amazon are very cheap and come with a motor controller, building the stepper variant can dramatically reduce the cost of the robot, which is helpful in a class environment where many are being created. The goal of this module is to streamline the creation of the lowest possible cost SMARS. Please note that there is a variant included which has a remix of retakozono's battery tray built into stackable chassis.