I want to add 3 - 7 segment LEDs to a project by means of several SN74HC165N shift registers. I'm curious to know if those registers will work at a baud rate of 250000. That is necessary for my project to work, so if its too fast for the registers is there a way to work around it while my main project runs at that rate? (maybe a subroutine that has a different Serial.begin command?) Any advice is appreciated. Thanks!