Hello All:
I have a circuit consisting of a PIC that provides a clock and other control TTL level voltages for a L297 stepper controller which in turn drives a L298 stepper driver. The power for the whole circuit is provided by a 12v switching power supply. The supply directly feeds the L298 for the stepper motor. The L297/L298 and PICc are powered by a 5 volt regulator off the 12v power supply.
Seems to work well but I want to redo the design a bit, I do have some concerns about the amount of noise on the power lines from the Stepper motor. I have the appropriate bypass caps everywhere, but wondering if there is some tips to limit the power supply noise. Should I perhaps use 2-5volt regulators off the 12v supply. One for the L297/298 and another one for the PIC.
I have heard topics such as star grounds.??
Any suggestions or tips appreciated
Cheers
I have a circuit consisting of a PIC that provides a clock and other control TTL level voltages for a L297 stepper controller which in turn drives a L298 stepper driver. The power for the whole circuit is provided by a 12v switching power supply. The supply directly feeds the L298 for the stepper motor. The L297/L298 and PICc are powered by a 5 volt regulator off the 12v power supply.
Seems to work well but I want to redo the design a bit, I do have some concerns about the amount of noise on the power lines from the Stepper motor. I have the appropriate bypass caps everywhere, but wondering if there is some tips to limit the power supply noise. Should I perhaps use 2-5volt regulators off the 12v supply. One for the L297/298 and another one for the PIC.
I have heard topics such as star grounds.??
Any suggestions or tips appreciated
Cheers