Document bit rotating switch can used to replaced traditional resistance type potential meter simulation function of rotating pulse produced device, these document bit rotating switch usually application in instrument front-end Panel and Audio Control Board of interface, document bit rotating switch used orthogonal optical coding device as replaced simulation potential meter of pure digital devices, these document bit rotating switch in appearance Shang similar Yu traditional or resistance type potential meter, but these document bit rotating switch of internal structure completely digital and using optical technology. Similar to traditional and incremental encoder product has two quadrature output signal (channel a and channel b), you can direct and connect encoder chip.