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View Full Version : JR8900 connection on 8V setup


invertsick
05-11-2008, 11:33 AM
Hi Freaks,

I've been flyin my 600N on 8V setup for more than a month now, but just today I realized something that maybe shouldn't be.

I have connected my 2s lipo to the ar7000 and all my cyclic servos (8717) and multigov and Jr8715 throthle servo direct to the receiver, so every thing is running on 8V except the gyro.

For the gyro I am using the spektrum voltage regulator which drops the voltage to 5.2V

Before I run 8V, when I was using my align 2 in 1 I had an align 5.1 V step down between the gyro and the TR servo 8900 as it is rated 4.8V

Do I still need to keep the step down between the gyro and TR servo???

It was there for a long time and it was ok, but will I take more performence out of the 8900 without the step down, as already the gyro input is 5.2 from the spektrum regulator.

10x for all the inputs.

rgds,
Serge

Finless
05-11-2008, 12:03 PM
The tail servo gets power from the gyro so if you have your gyro stepped down to 5.2 then you do not need the additional step down between the gyro and the tail servo.

Bob

invertsick
05-11-2008, 12:25 PM
Thanks Bob,
Will remove it today

Cliozeek
05-12-2008, 12:16 PM
Do you know if Curtis's gyro steps down the volyage from 7.4 volts to 4.8 volts? I'm getting ready to build a 600N and will be using the JR8700 servo.

invertsick
05-12-2008, 12:31 PM
Cliozeek,

what do you mean?
R u goin to use 2 cell lipo direct to the receiver without any regulater?

If that is the case first you must make sure the CY gyro accepts 8V input.
And if it accepts 8V you cannot use the align 5.1 step down connection, As it just steps down 0.9 volts. Maybe you must use same like me the spektrum regulater between the gyro and the receiver.

Any way you need the spektrum regulator cause you need 2 outputs one for the gyro and the other for the throtle servo. (unless you are using 8717 on your throtle)

Cliozeek
05-12-2008, 03:52 PM
No I will be using Align's 2in1 which should feed the Gyro with 6volts. I'm always a little concerned when the servo notes 4.8v only. IS 5.1 v going to damage the servo long term if it's seeing 5.1v?