“Magic Bullet Diode” could save your electric aircraft! BEC Backup/Failsafe for under $1 with Demo.

Published on December 13, 2017

NOTE: This diode is used ONLY for switching BEC Voltage to Backup 5V RX battery, NOT for switching MOTOR batteries! If the BEC in your ESC or UBEC fails, this simple backup will prove very valuable and save your plane or heli. Schottky diodes work like this. For the experts and what I learned in Avionics school is that a Schottky diode, is a semiconductor with a metal junction that is formed between the semiconductor and a metal, thus creating a Schottky wall. The N-type semiconductor acts as the cathode and the metal side acts as the anode of the diode. This results in both a low forward voltage drop and very fast switching. If BEC inside your ESC fails, the motor will still run, since external battery will keep radio running and ESC’s speed control running. If DIODE fails, one side will always work.

See links below for previous landing battery Switching videos.

Double your flight time with a second battery via TX switch!

Landing battery can save you if first battery fails!

Byron General Dynamics YF16 Electrified

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Dave Herbert
AMA L-8221
CD/LM/Scientific Div

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