The Annin Robotics AR2 is an open source low cost robot. Here is the youtube video show how to build a AR2 robot by yourself OPEN SOURCE LOW COST ROBOTS
1 x Nema 17 Stepper Motor L=39mm Gear Ratio 20:1 High..
The Annin Robotics AR3 is an open source low cost robot. Please note this kit is pre-selled and will be shipped in about 15 days after you paying.
1 x Nema 17 Dual Shaft Stepper Motor L=39mm Gear Ratio 10:1..