Jymc220bi Schematic 2021 90%

Connect your speed pot here; the center wiper must go to . F+, F- Field Winding

From analyzing over 30 failed devices (portable fans, LED makeup mirrors): jymc220bi schematic 2021

[ V_OUT = 1.25V \times (1 + \fracR_topR_bottom) ] Connect your speed pot here; the center wiper must go to