Servo Board

[Laser]

What kind is the best to use for its servo board that will run on 7.4v

[harry hills]

Re: Servo Board

mate, no servo board will run 7.4v for very long, anyway it would be geting 6v from the rx anyway.

[Laser]

Re: Servo Board

Even the futaba s3003 servo craig recommends on robotwars101?

[harry hills]

Re: Servo Board

i don't know how he manged that, any way how will you get 7.4v to the board without it going to the rx?

[Laser]

Re: Servo Board

it will go through the rx.
does the planet t5 rx have a built in voltage regulator?

[harry hills]

Re: Servo Board

7.4v will blow the rx im afraid

[jonny]

Re: Servo Board

yep, maybe you could only have the signal wire going to the receiver and the power wires going to a jst connector and the lipo connected to the jst connector

[daliad100]

Re: Servo Board

If the servo can handle it you can connect the full battery voltage to the servo, leave the signal and negative wires and run the reciever through a regulator/ separate battery

[widow_twanky]

Re: Servo Board

To connect to the receiver you would need to take the signal wire and negative because it needs a return path. In donkey we run the receiver through a 7805 voltage regulator (with some capacitors on it) and connect directly to the hpx servos.

[woody]

Re: Servo Board

7.4v will blow the rx im afraid

http://www.horizonhobby.co.uk/aeroonlin ... smain.html

Voltage Range: Input: 3.5-9.6Volt

So it depends on the receiver specs.

servo voltage hack.

http://www.teamkiss.com/antweight.html

last article.

[jonny]

Re: Servo Board

the receiver he's talking about (planet 5) WILL blow on 7.4v

[woody]

Re: Servo Board

http://www.cornwallmodelboats.co.uk/aca ... #aP7710200

The heavier one seems to be capable of going to 9v.

Usage I suppose depends on wether the mods to enable the current setup to run a higher voltage weigh more than 0.5 gram.

[jonny]

Re: Servo Board

Oops, didn't realise they more than 1 planet 5 rx!

[Laser]

Re: Servo Board

I've already been running my planet T5 at 7.4v
The original servo board I was using was a HPI SF-1 as I stripped the gears.
Would the Futaba S3003 work on 7.4v?

[razerdave]

Re: Servo Board

That rating on Spektrum RX's of 3-9v is bull-poo, I've known people blow them up trying to plug a lipo into it.

When I helped make a 3-Servo lipo ant, I had a voltage regulator that stepped down 7.4v to 6v and powered the receiver, the positive wires from all 3 servos went in before the regulator chip (FET). Spektrum RX's may struggle with that unless you have a large battery and a high rated FET, the one I used was 1.5A.