dual SBUS receivers power box for RC planes

Project Overview: 2S LiPo High-Current Power Box with two Sbus inputs

This circuit is a high-performance power distribution system designed for large-scale RC models. It manages power from dual batteries to drive up to 16 High-Voltage (HV) servos while providing redundancy from two Sbus receivers and electronic switching.

Key Technical Features

Dual Battery Redundancy: The input stage features two "Ideal Diodes" (U$1, U$2). These allow for a dual-battery setup (2S LiPo, ~8.4V) with minimal voltage drop and prevent back-charging if one pack fails or has a lower voltage. High-Current Power Path: Utilizing multiple IRF4905 P-Channel MOSFETs in parallel, the board is designed to handle a continuous load of 20A, ensuring stable current delivery to 16 HV servos during high-torque maneuvers. Electronic Switching (Soft-Switch): * The circuit includes a logic stage (BSS123 N-FETs) that controls the main power MOSFETs. Compatibility: The "SW" header is designed to interface with Jeti RC switches or Magnetic switches. It uses a "fail-on" logic where the system remains powered if the switch signal is lost, enhancing safety. Servo Distribution: The output rail (VSERV) distributes power across 16 headers , supporting 16 primary servos with integrated decoupling capacitors (C1, C2, C3) to filter voltage spikes and electrical noise.. Receivers decoding : An ESP32 will take care of decoding Sbus signal from two independant receivers and switch from one to the other in case of failure. Failsafe output can be configured

The project is fully open source open hardware.

Details can be found on my hackaday pages : https://hackaday.io/project/205573-dual-sbus-receivers-power-box-for-rc-planes PCB available at PCBWay shared project : https://www.pcbway.com/project/shareproject/2S_LiPo_High_Current_Power_Box_with_two_Sbus_inputs_ccb15bdf.html

Category: R/C Vehicles