S bus

[Richard Acland]

I recently purchased a receiver which has an S bus connection. There is no explanation of what this does or how to use it. Can someone explain what it it is for and how to use it in laymans terms ( ie no jargon).

[Tim Ballinger]

Richard ,

if you search the forum for Sbus you will find at least 3 threads discussing this. I used The one ‘How do Sbus servos work ‘ as my tutorial.

There are many nuances which you will find discussed in the above threads, however in simple terms the Serial Bus sends all the channel control data along one servo lead in series and each channel in the data stream has a unique address. This generally allows you to use up to 16 channels if you need them. The Sbus can be decoded to analogue and split into analogue channels and can therefore use standard servos or you can use digital servos which are programmed to do the decoding themselves. You can mix and match standard analogue channels with the digital Sbus channels as you see fit. There are some devils in the detail with the Sbus decoders and if the frame rate is incorrect you can fry a an analogue servo .

That detail is in the threads noted above and is worth reading through. However if you want to use fewer leads in your setup or need more than 8 channels then Sbus cab be very useful.

Ther are many who know more detail but that’s the way I look at it.

Tim