Power

The seven-hex prototype is intended to use the already-owned single-cell 3.7V, approximately 1850mAh LiPo. Its runtime has not been measured. A 5000mAh replacement is not part of the current requirement.

This shows the intended load path; exact battery, protected-output, and module terminal wiring must be checked on the purchased boards. Do not infer simultaneous charging and gameplay support from this diagram. Charge current, battery limits, and any required power-path arrangement need verification.

The PK4056 product listing describes a USB-C single-cell charger with protection features. Confirm the supplied module and battery before wiring. The MT3608 module is the selected boost-converter reference; its usable output in this assembly must be established under load.

Distribution and local smoothing

Each hex is expected to have approximately 10µF across 5V/GND near its power entry. The development board includes support components; local smoothing is not a substitute for checking the module's actual decoupling. Capacitor polarity and voltage rating must suit the circuit.

A common ground is required. Longer boards may need thicker or branched power wiring rather than feeding every load through a long thin daisy chain. Power topology can differ from CHAIN order.

Power budget still to measure

Measure the main controller, one active hex, all seven hexes, and display/update peaks. Measure voltage at the farthest hex under load. The battery's nominal energy is approximately 3.7V × 1.85Ah = 6.85Wh; usable energy and runtime depend on conversion losses, load, and discharge limits. No runtime is promised by the capacity alone.

The Raspberry Pi Display Unit is outside this prototype rail budget until its power requirements are selected. See its hardware page and the BOM.