SpeedyBee F405 AIO 40A Bluejay 25.5×25.5 3-6S Flight Controller

An FPV AIO (All-in-One) board is an ultra-compact circuit that integrates the Flight Controller (FC) and the 4-in-1 Electronic Speed Controller (ESC) into a single PCB. Designed primarily for weight-sensitive builds like Tiny Whoops and Toothpicks, these boards eliminate the need for stacking multiple components and reduce wiring complexity significantly. Some advanced versions even include a built-in Radio Receiver (RX) or Video Transmitter (VTX), making them a true "plug-and-play" brain for micro drones. While they save space, the tradeoff is limited heat dissipation and the fact that if one component (like a single ESC) fails, the entire board usually needs replacement.