- #1
A.J.710
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- TL;DR Summary
- What provisions should be made to use a single PWM signal across multiple daisy chained PCBs?
Hello,
Looking for advice/thoughts on a PWM signal going across multiple PCBs. The signal would be relatively slow (1kHz) but I've really only ever dealt with PWM on a single board or cable. The premise of this effort would be to have a PWM control signal and be able to daisy chain multiple boards of the driver it is controlling. There would essentially be 1 control module outputting the PWM and then each board would have a bus for power and the PWM line so they can be daisy chained up to maybe 8 boards in total.
PWM would be the output of a 3.3V MCU. What would be the best way to successfully implement this? Would the signal be okay traveling over 8 PCBs or should each one have some sort of op-amp buffer? Would delay to the last board then be a concern? Would keeping traces large and using an analog voltage level as control be better?
Thanks!
Looking for advice/thoughts on a PWM signal going across multiple PCBs. The signal would be relatively slow (1kHz) but I've really only ever dealt with PWM on a single board or cable. The premise of this effort would be to have a PWM control signal and be able to daisy chain multiple boards of the driver it is controlling. There would essentially be 1 control module outputting the PWM and then each board would have a bus for power and the PWM line so they can be daisy chained up to maybe 8 boards in total.
PWM would be the output of a 3.3V MCU. What would be the best way to successfully implement this? Would the signal be okay traveling over 8 PCBs or should each one have some sort of op-amp buffer? Would delay to the last board then be a concern? Would keeping traces large and using an analog voltage level as control be better?
Thanks!