Amazon.com: BIGTREETECH DIRECT TMC2209 V1.2/V1.3 UART Stepper Motor Driver Ultra-Silent Stepsticks with Heatsink Mute 3D Printer Parts for Octopus/SKR 2/SKR V1.4 Turbo Manta M5P Motherboard 5PCS : Industrial & Scientific
Vref Calculator: How to Tune Your Stepper Driver | All3DP
TMC 2208 Vref issues. Shouldn't it be closer to 700? : r/3Dprinting
VREF HOW TO CALCULATE IRMS [TMC2208-TMC2209-TMC2130] - YouTube
How to calculate VREF - 3D Print Guides
TMC2225 Stepper Motor Driver Testing – Jim's Embeddedtronics