NOTE: Documentation in progress!

Introduction

The 12V -> 5V @ 4A Buck Converter + ELRS Board is intent for several foam fixed wing planes at the Waterloo Aerial Robotics Group. It includes a ESP32-C3 and SX1281 for RF control over ELRS, as well as the requisite power electronics to have system be powered by a single 12V input (1x 3S battery).

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This board does not currently integrate an ESC for motor control.

Usage

This board is designed to use a single 3S battery for input power. This will split the power into two output XT60 connectors, and feed to the buck converter, which, in combination with an LDO, powers the rest of the device.

The power rail is rated for an absolute maximum of 16.9V, accounting for LiPo battery overcharging and input transients (voltage spikes from hot-plugging a high-inductance battery). Usage of an anti-spark connector is recommended.

Schematic

Altium 365 | 12V-5V 4A Buck with ELRS

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