Confirming validity of schematic for dual stepper motor PCB

Thread Starter

ProbablyHuman

Joined Jan 13, 2021
1
I'm trying to make my first schematic for a PCB that would sit atop an RPI and allow for control of two stepper motors. I have an LM2576 to take 12v from the motor supply and step it down to 5v for the RPI, and I took the schematic from Pololu's DRV8225 as the driver for the motors.

I did however modify a couple of things, such as add a single capacitor to act as voltage spike protection for both the LM2576 and the two DRV8225 ics. I also tethered reset and sleep to 5v on the board, and enable as I would want to keep the driver running so long as the board is on.

I am just very worried that if I order the PCB there's no turning back, so I want to make sure I have everything right before I start. My biggest ask is that on Pololu's schematic for the DRV8225, they have this circuit separate from the ic off to the side, I assumed that if it changed the power supply, I would only need one per board despite having two of the driver ics.

Here is my schematic so far, which I have designed in easy eda
My Schematic.png
 

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Sensacell

Joined Jun 19, 2012
2,671
Truth is- every new PCB is a test PCB

You cannot anticipate every problem, I take the attitude that the first version is always going to be wrong in some way.
Make one quickly, test it, fix the problems, and make the final version. It's faster than trying to agonize over every detail.
 
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