Help! How to use Ready to sky 40A ESC, which has no BEC

hello all, recently bought a Ready to sky 40A LiPo 2-6S compatible brushless ESC for rc fixed wing plane and, a 4S 850mAh battery.
Unfortunately, ESC doesn't have BEC circuit to power the receiver.Only black and white wires are coming from ESC.

I don't know, how to use this ESC for FT Flyer. Please help in what should be the steps I should carry out.
 

Attachments

  • IMG20240828233951.jpg
    IMG20240828233951.jpg
    3.7 MB · Views: 0

Foamforce

Elite member
hello all, recently bought a Ready to sky 40A LiPo 2-6S compatible brushless ESC for rc fixed wing plane and, a 4S 850mAh battery.
Unfortunately, ESC doesn't have BEC circuit to power the receiver.Only black and white wires are coming from ESC.

I don't know, how to use this ESC for FT Flyer. Please help in what should be the steps I should carry out.
You will need a stand-alone BEC. They are inexpensive, but not that much cheaper than just buying a different ESC that has a BEC. You would also need a battery splitter to send power to the standalone BEC.

You may be able to power your receiver and servos off a standalone 1 or 2s battery, but I’m not sure how grounds work in that case.

Buying a different ESC with a built in BEC is the most practical approach.
 

quorneng

Master member
It is marked OPTO which means no BEC.
There are advantages. The ESC will be smaller and run cooler as the BEC produces heat as well. You are free to choose a stand alone BEC to suit the power requirement of the systems on you plane. Also you can also be absolutely sure that if for any reason the ESC fails you will retain full control of the plane.