Luberth Dijkman's video: Arduino windturbine RPM Arduino windturbine speed monitor

think rpm and count arduino uno/ nano code in the comments should work https://github.com/Electric-Storm/Arduino_windturbine_load_control/blob/main/Arduino_windturbine_RPM.ino https://raw.githubusercontent.com/Electric-Storm/Arduino_windturbine_load_control/main/20230122_225828.jpg no sensor, sense from ac of 1 alternator winding treid with a rope on axis like chainsaw start voltage dc side over 65vdc looks like i can not blow the arduino input treid with a rope on axis on 24v windturbine over 140vdc with maybe 3000rpm up nano input d2 is still working thanks to the zenerdiode? there is a 5.1v zenerdiode from input d2 to ground 47kiloohm resistor from input d2 to ground 1 winding ac to 22kiloohm resistor to input d2 dc -min after 3 phase rectifier connected to ground looks like there are 6 pulses/counts per rotation rotation speed has to produce more then 4v before it starts counting the 24v windturbine start counting with low rpm