Direct Power HV Servo
 

I am interested in trying this with my 1/8 buggy (HB D819) here is my dillema;
I want to use a 3s lipo for power and am not sure if this will damage my reciever which is a Hitec Axion 2. How can I get the 3s power to the servo but keep the voltage to the reciever at 2s nominal voltage - I am not sure if this reciever can handle 3s if it can problem solved maybe? Miraculously I have found a 3s lipo that will fit my radio tray but really leaves little room for any additional wiring - considering the steering servo wire routes through the battery box on the HB.
Any advice will be appreciated and I can answer any questions you might have if I have left something out.

What servo are you using that can handle 3s direcly ?

A robot servo. 3 cells on a rx No way. use a ubec to drop voltage down

The direct power HV servos I have used wire directly to the battery. The plug in the RX is just for signal, no HV.

https://holmeshobbies.com/electronic...-lp-servo.html

Hv servo
 

I plan to use a similar servo to this but how do I take that 3s lipo voltage down so it does not fry the reciever? BEC?

Ok rcguy I will give that a look.

HV servo
 

There are more and more available nowadays.

can you post a link.im noy finding any

If you do not power the RX from an ESC, then yes.
Put A BEC on the same leads that power the servo and bump it down and plug it into the RX.

I power the RX from the built in BEC of the ESC. There are only 2 wires going from servo to RX, a ground and a signal. No voltage.

statement retracted.

I don't make the servo, I just use it.
And they all have two wires going to the RX. Perhaps to prevent a floating ground?


https://cimg7.ibsrv.net/gimg/www.rct...b614339033.png
https://cimg9.ibsrv.net/gimg/www.rct...3b668223dd.png

You can make your own harness similar to this method here by using the balance port of the battery to draw 3S:

https://www.rcgroups.com/forums/show...0#post40061288

Well in the case of the OP's question; Use a servo like this and power the receiver via the ESC or a BEC (if nitro).

I run direct power servos in 4s its not a problem at all just make sure to get a 4s servo. The power they have is ridiculous and speed is impressive.

Re: Hv Servo
 

This is what I am after. I am using the new hard servo spring and have it locked down. You'd be surprised how much the servo saver deflects in a high speed turn...especially in high bite conditions...