PLEASE NOTE:
1. The nixie tube only displays the percentage of the full speed of the motor from 0-100, not the actual speed of the motor;
For example, if the maximum speed of the motor is 500 rpm, it will display 100 at 500 rpm and 50 at 250 rpm.
2. The input voltage must be divided into positive and negative, can not input 220V household electricity
The input voltage should be equal to the rated voltage of the motor (within 6-60V)
Such as motor rated voltage 12 input 12V motor, 36V input 36V