I have a newbie power regulation question. I want to power a Raspberry Pi, one or more Arduinos, and a collection of 20D Metal GearMotors from the same power supply. The Pi is doing motion planning, and the Ardinos are handling encoder counting and controlling the motors.
I want to make sure the processors are isolated from the motors, and ensure that the motors don’t consume all the power.
Is this a recommended layout?
I thought about using the regulator built into the A*, but that doesn’t help with the Pi. I am hoping the current sensor can detect an unexpected stall fast enough to trigger a halt before the processors loose power. I might upgrade to a 5A adapter once I am comfortable with the 3A.
A) Wall Power Adapter: 5VDC, 3A, 5.5×2.1mm Barrel Jack, Center-Positive (https://www.pololu.com/product/1461)
B) Raspberry Pi: Consuming 5V at <2A
C) Arduino: Consuming 7V-12V at <50mA each
D) 391:1 Metal Gearmotor 20Dx46L mm 6V CB, Consuming 6V at 0-250 mA each (https://www.pololu.com/product/3710)
E) ACS714 Current Sensor Carrier -5A to +5A (https://www.pololu.com/product/1185)
R1) Pololu 9V Step-Up Voltage Regulator U3V50F9, Max 5A input, 9 V Output (https://www.pololu.com/product/2567)
R2) Pololu 6V Step-Up Voltage Regulator U3V50F6, Max 5A input, 6 V Output (https://www.pololu.com/product/2566)
R3) Pololu 5V, 5A Step-Down Voltage Regulator D24V50F5, Max 5A input, 5 V Output (https://www.pololu.com/product/2851)
(EDIT: Added part numbers for regulators)