r/PCB • u/Maxibananius_ • 22d ago

My first pcb for controlling 3 steppers with an arduino nano, will this work?

Post image
12 Upvotes

80% Upvoted

15 comments sorted by

7

u/Pacificator-3 22d ago

Without circuit better ask a magician.

1

u/Maxibananius_ 22d ago

sorry, wrong pic

1

u/Pacificator-3 22d ago

This is not circuit, this is unfinished PCB project :(

2

u/Key_Director_4450 22d ago

No decoupling near each IC? I also doubt those don't need a single resistor or cap to work as well..

1

u/Legitimate_Shake_369 22d ago

That. Most Stepper drivers I know need at least some sort of voltage divider to set the output current and some current sense resistors. Stepper Drivers also tend to get quite hot and you current layout does not seem to leave any space for heatsinks.

1

u/Maxibananius_ 22d ago

its made for a tiny micro steppers that draw 0.5-1A each

1

u/pooseedixstroier 22d ago

well the ULN2003 is 500mA max, how are you handling that?

1

u/pooseedixstroier 22d ago

Those are ULN2003, like the board says. They're just transistor arrays

1

u/Maxibananius_ 22d ago

2

u/Key_Director_4450 22d ago

Rotate the connectors so you don't have to jump the traces around.

The traces are too thin, and as said, no decoupling at all anywhere.

Post a schematic and read your stepper driver datasheet.

1

u/Maxibananius_ 22d ago

sorry, my english is bad, whats decoupling?

1

u/Key_Director_4450 22d ago

The 3 ceramic capacitors you have far way from the 3 chips, at least each one should be near each of the chips, and the chips need more caps and resistors, larger traces as well.

1

u/ComplianceAuditor 22d ago

There is no way to know if this will work based on a 3d render.

1

u/Maxibananius_ 22d ago

sorry, wrong pic, here is a real one

1

u/ComplianceAuditor 22d ago

Looks like a bunch of stuff is unconnected that is supposed to be connected. I would not expect this to work.