Running a Sparkfun Servo pHAT with Raspberry Pi

Components & Accessories Power
1

Hi,

I’m working on a project which involves a Raspberry Pi and the Sparkfun Servo pHAT (https://www.sparkfun.com/products/15316). I wanted to ask 2 questions regarding this product:

  1. Does the phat work properly on Raspberry Pi 4?

  2. I’m planning to connect multiple servos (around 6) to the phat, and the power supply directly to the Pi. In addition, I want to connect the phat to the Pi using a cable (https://www.sparkfun.com/products/17261), and not to put it on the Pi as a hat (I need the GPIO pins for other purposes of the project). Is it recommended to power the phat using that qwiic cable (namely, running it on the Pi’s voltage)? If not, is it possible to cut the red wire of the qwiic cable, connect only the GND, SDA and SCL to the Pi and power the phat directly with the power supply using type C cable? (So that the Pi and the phat are both connected to the power supply independently, and there’s no 3.3V cable connecting them)

Thanks in advance,

Guy

2

1 - Yes

2 - That should work, though please double-check everything https://learn.sparkfun.com/tutorials/pi … -guide/all (see the “power” section)…there are LOTS of caveats, but in theory what you’ve described should work