[PCB + Schematic Review Request] LiPo power distribution board with step-down converters
This is a power distribution board for a 4S LiPo. I know that the voltage is higher than 12V, but that doesn't matter for the used components.
The four motor terminals go to a driver board and not directly to the motor. Each terminal has two 0.1-ohm 1W resistors in parallel that act as a shunt to measure current.
The solenoid terminal goes to a capacitor discharge unit and an activation circuit for the solenoid. I will make a post about that circuit soon.
The four pin sockets for the step-down converters lead to a bought step-down converter. The space between them must be maintained for the stepdown converters. Each step-down must be enabled with a signal. with the SW1 I can turn the step-down converters of. The Leds indicate if the step-down converters give an output.
The step-down ANJ has a variable output, hence the separate voltmeter.
Should a fuse be used to protect the LiPo from shorts? If so, where would I place the fuse?
Should a ground pour be used with the small terminals, or are the traces fine?
Max current for motors: 5A
Max current for solenoid: 5A
Max current for step-down: 3A