A capacitor across the battery leads is one of the cheapest, highest-impact additions to any FPV build. It suppresses voltage spikes, cleans video feed noise, and protects ESC MOSFETs from back-EMF transients. Why Voltage Spikes Happen When a motor changes speed rapidly, it generates back-EMF — a voltage spike that …

DSHOT is a digital ESC protocol. When used bidirectionally, it feeds motor RPM back to the flight controller, enabling the RPM filter — the single biggest improvement to motor noise rejection in modern Betaflight tunes. For the byte-level view of how the frames and eRPM telemetry are encoded on the wire, see DSHOT on …