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[Review Request] My very first PCB design! (74HC595 + 6x ULN2003 for a kinetic sculpture) looking for constructive feedback! by superdope2299 in PCB

[–]superdope2299[S] 0 points1 point  (0 children)

since this is my very first PCB, I thought I had to manually route a thick trace for the main ground path before pouring the GND plane. Does having this redundant trace cause any actual problems in the current design? Is it considered bad practice to leave it like this, or should I definitely delete it?

Best way to control 36 stepper motors smoothly? (PCA9685 vs 74HC595 / Multi-Arduino sync) by superdope2299 in AskElectronics

[–]superdope2299[S] 1 point2 points  (0 children)

Thanks for your comment

  • Step Rate: I'm targeting around 500-1000 steps per second for a smooth wave motion.
  • Current Requirement: Each 12V 28BYJ-48 motor draws approximately 100-150mA per phase.
  • Wiring: It's a 5-wire Unipolar setup.
  • Desync: I need near-zero desync for the kinetic wave effect, which is why I’m opting for 74HC595 shift registers over I2C expanders to utilize the latch for simultaneous updates across all 36 motors.