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Battery Eliminator Circuits (BEC)
A battery eliminator circuit or BEC is a feature of some speed controls which allows the model's drive battery to power the onboard radio system as well. Some speed controllers (e.g. opto-coupled) do not contain a BEC and others, when used at the top end of their voltage range, would get too hot when supplying multiple servos. In both cases, a separate BEC module must be used to power the radio and servos.
A BEC an also be used in non-powered models to take advantage of the large capacity and low weight of LiPo batteries. A 2 cell LiPo battery is far lighter than a 4 cell NiMH of equivalent capacity.
A switch mode BEC with 3A output using 2S - 5S LiPo. The output is selectable between 5V and 6V. Size: 41.6mm x 16.6mm x 7.0mm. Weight: 9g (incl cable).
A switch mode BEC with 6A output using 2S - 6S LiPo (6V to 25V). The output is a regulated 4.8V. Size: 20 x 14 x 49mm. Weight: 19g (incl cable).
A switch mode BEC which will supply a constant 5A from 2 - 10 cell LiPo. Outputs a selectable 5V or 6V to your receiver. Size: 60mm x 26mm x 13mm. Weight: 21gm (incl cable).
Hyperion Switch-Mode BEC Unit with NET Noise Elimination Technology - 4A Sustained Rating, 5A Max, Selectable 5V or 6V Output, Use with up to 10S Lithium Packs, Compact and 20g.
The efficient switched mode circuit means that the Hyperion BEC efficiently converts even 40V (10S) to match the receiver at 5V or 6V (selectable) without overheating. It can support as many as 8 standard servos (or 6 digital servos), almost regardless of the type of main pack used.
Download the instruction manual.
The Blue Arrow linear voltage regulator is a lightweight 5V regulator that enables you to power a small receiver and micro-servos from a 2-cell (7.4V) LiPo battery pack. Size: Size: 15 x 11 x 4 mm + leads, Weight: 2.4g
It is designed primarily for glider pilots who wish to use LiPo packs for their higher capacity and lighter weight. Supplied fitted with female red JST input and JR/Hitec output connectors.
Blue Arrow 1A BEC user manual.
