# Minimum electronics — V1-PROOF

The active minimum is **one MCU + IMU, two encoder wheel motors, two bidirectional H-bridges, a timed manual input link, a compatible battery/charger and protected logic power**. Add two small leg servos and their interface/rail after pinned-leg balance works.

Start with equipment confirmed in [parts-on-hand.md](parts-on-hand.md). There is no required Pi, CAN network, 8S pack, camera or separate pose computer. [Electronics plan](electronics.md) owns interfaces and power qualification; [budget](bom.md) covers replacements. The former eight-axis minimum is [parked](archive/stair-v1/electronics-minimum.md).