拇指开关 - 推轮

A thumbwheel switch is a setting switch that converts the numeric value selected by turning a disk-shaped part on which numbers are written into a binary, decimal, hexadecimal or other code using the combination of ON and OFF signals for multiple contact circuits and that outputs the resulting code. The thumb wheel selector switches are normally configured to provide a base two output for use with microprocessor-based systems. A value is entered and a binary output that corresponds with that value is generated. The switches are single digit and several units can be arrayed together.