Stepper Motor Driver A4988 Reprap Stepper Driver Green Red Module with Heatsink For 3D Printer Parts Ramps 1.4 Reprap Board
Adding more extruders - RepRap
Ramps Stepper Expander by wingnut2k - Thingiverse
3D Printer Parts A4988 DRV8825 Stepper Motor Driver With Heat sink For SKR V1.3 1.4 GTR V1.0 RAMPS 1.4 1.6 MKS GEN V1.4 board|Integrated Circuits| - AliExpress
Steppers not moving in any direction on Ramps 1.4 (Page 1) — Help/Repair/Maintenance — SoliForum - 3D Printing Community