I am looking to run a 6V or 12V peristaltic pump with a Pi 3 B+, which will also need power for a camera module V2 and a USB flashdrive.
The pumps I've found draw between 250-300mA during use, so powering it through the GPIO is not really an option. In a previous iteration of this project, a solenoid valve was supplemented with a 9V battery, but as the peristaltic pump will be active for longer periods of time it'd chew up batteries pretty quickly at that power draw.
What I'm looking for: a power supply configuration that would allow me to provide 2A to the Pi, and also 500mA at 6V or 12V to the pump. I have a breadboard for logical control of the pump and diode shielding of the GPIO, and can use that to step down voltages as needed as well. Any help or experience with a project like this is appreciated!