Eric Robb RC Eric Robb RC RC Builds · Custom Parts · Backyard Engineering
Free Tool

RC Wiring Designer

Pick your battery, ESC, and servos — see exactly how everything plugs together, in the right order. Tap any part of the diagram to learn what it does.

Most beginner ESCs have a built-in BEC (a 5V supply for your receiver)
An opto ESC or a 5S+ pack means you need an external BEC

The diagram updates live. Click any component or wire for a plain-English explanation.

positive (+) ground (−) signal motor phase (any order) LED data

👆 Tap any part of the diagram

Every box and wire is clickable — it'll tell you what it does, which way it plugs in, and what happens if you get it wrong.

Hookup Order

Wire It In This Order

    Don't Fry Your Gear

    The 5 Classic Mistakes

    • Reversed battery polarity. Red to red, black to black — one backwards plug-in kills an ESC instantly. Polarized connectors like XT60 exist for this reason.
    • Two BECs fighting. If you add an external BEC while your ESC has one too, pull the red pin out of the ESC's receiver lead. One 5V source only.
    • Servo plug backwards. Signal (orange/white) goes to the inner/signal pin. Most receivers won't be damaged, but the servo won't move.
    • Prop on during setup. Take the prop off before the first power-up. ESCs can arm unexpectedly, and throttle calibration spins the motor at full power.
    • Undersized wire. Thin wire on a high-current run gets hot, drops voltage, and can desolder itself mid-flight. Check the gauge table above.
    Bench Stock

    The Wiring Parts I Actually Use

    Every connection in the diagram above uses these. Links are to specific products I've verified — as an Amazon Associate, I earn from qualifying purchases.

    First power-up ritual: prop off → transmitter on → battery in → check servo directions → check motor direction (swap any two motor wires to reverse it) → power down → prop on → fly. Also see the RC electronics explainer if any part above is new to you.

    See exactly how your RC plane wires together

    A basic RC airplane is only five electrical parts and four connections, but the order you connect them — and a couple of easy mistakes — decide whether it powers up or lets the smoke out. Pick your battery, ESC, receiver and servos and this tool draws the color-coded diagram for your exact setup, in the right hookup order.

    How the connections work

    The battery feeds the ESC; the ESC drives the three-wire brushless motor and also sends a clean 5V back up its signal lead to power the receiver (that's the BEC — your receiver has no separate battery on a basic setup). Each servo plugs into its receiver channel with a three-wire lead: signal, positive, ground. Plug the battery in last, and unplug it first.

    The mistakes that fry electronics

    Reversed battery polarity, powering the receiver from two sources at once, and back-feeding voltage are the classics — the diagram flags them for your parts. If the prop blows air the wrong way, you don't rewire anything: just swap any two of the three motor wires. For the plain-English version, read RC Plane Connections, Simplified.

    Next in the Eric Robb Builder System

    Next: check your numbers

    Wiring sorted. Sanity-check your CG, wing loading, thrust, and flight time before the maiden.

    Open the RC Calculators → All tools