Can anyone point out what I'm doing wrong with this build At the moment when I plug in battery the distribution board heats up. I put a stepdown to 5v to the fc ad I don't think it I can put battery straight to it Board is a f3 x racer and a 4 in 1 distribution
Heat is normal. Just get it up quick as airflow cools it down. No need for the separate 5v. the 4in1 esc jst block with wires should supply 5v to fcb. Though yours don't look like it has. But should.