At the moment I am powering my Raspberry 4 via USB-C from this
Step-down DC-DC Converter Module for Raspberry Pi
https://www.sunfounder.com/step-down-dc ... ry-pi.html
. Input is a 2-4S Lipo. A PCA9685 is connected through the 5V pins of the Step-down DC-DC Converter. The 2A are enough to power the raspberry when no USB decides are connected (I want to switch to a more Amp converter). The raw input from the lipo also powers a Sainsmart Roverbot Motor Protoshield.
I want to power the Pi via GPIO. As it is said, it should be safe now with the Raspi4, compared to the Raspi3, where this was not possible?!
Is the connected safe for the raspberry and PCA9685, if there were back-currents from the motors on the Protoshield?
Is there a small and simple device that would protect the whole circuits and provide more amps, to change tot current Stepdown converter?
I have one PCA9685 16-Channel 12-Bit PWM Servo Driver
https://www.sunfounder.com/pca9685-16-c ... river.html
powered by the 5V pins of the Step-down DC-DC Converter Module that is also connected to the Raspberry.
This wiring was suggested in the Smart Video Car from Sunfounder.
I actually want to power my Raspberry from the Step-down DC-DC Converter Module 5V pins into the 5 V GPIO pins.
“According to the reduced schematics the USB-C power in is directly connected to the 5v pin on the GPIO header”. So is it safe on the Raspi4 to used this setup to wire everything?
Is this wiring correct or can I skip the V+ from the Raspberry GPIO to the PCA9685, as it already gets power from the Stepdown converter?
I am new to electronics!
How does a polyfuse would look like to protect the Pi?
Can someone provide a link of a ready to use Stepdown converter with a fuse/protection circuit to connect my boards, that provides at least 3A output to power the PI via GPIO?