vasek

My Feedback: (4)

After reading a lot of stuff about Voltage drop lockout on Spectrum, I've decided to go with a smaller 6V powering the Rx only & having A123 power the servos.

I need a diagram how to hook it up.

Thanx,V.

Josey Wales

My Feedback: (61)

Why not just use a single 2s A123 pack ?

alan0899

G'day Mate,
Exactly, I could not agree more, it's battery capacity that you really need, & the ability of your batteries to supply enough current when required, A123's are perfect for that.

vasek

My Feedback: (4)

Thanks for the info guys, i might go that route.

But i would still like to have a diagram on how to hook up a separate battery for the Rx only. Anyone?

aghost

My Feedback: (13)

Here is a schematic showing one servo and one RX, each with their own battery pack. You should be able to add more servos in a similar manner.

The schematic is one I copied from another thread. I cannot take any credit for it!! Hope it helps.

Brian

vasek

My Feedback: (4)

Thanks Brian

rcairflr

My Feedback: (44)

IMO that setup does nothing to improve your chances of getting a airplane safely on the ground because of component failure. As a matter of fact it decreases your chance. You are adding more components and not getting any redundancy.

I for one would be interested in what model airplane and setup you are thinking about.

Josey Wales

My Feedback: (61)

I agree 100%

OldRookie

My Feedback: (13)

I have used that set-up for mechanical retracts.
It does serve a purpose, but just for mechanical retracts. The idea is that if your retracts don't go up completely, and the servo stalls out, it won't drain your main battery pack.

Greg

vasek

My Feedback: (4)

You're right Greg, it is simple(r) for just one servo. I'm trying to figure out how to "safe-proof" an sudden battery drop to the Rx

I will be setting up Spectrum 2.4 for the first time & trying to figure a way to insulate the Rx from a high current draw of digital servos.

Maybe this is not the right path.

rcairflr

My Feedback: (44)

You still did not tell us what airplane you are putting this in so we have an idea of your current draw. Just because you are using digital servos does not mean you are going to have a lot of current draw. The bigger the airplane the higher the current draw because of more load on the servo.

Depending on the size of your airplane, why not just use a singe 2S A123 battery as listed above or go with a dual battery setup into your receiver. On my 35% Extra 260 with 1 JR8711, 6 HS-5955's and 1 HS-5945 I use (2) low impedance 2000mA NiMh batteries each with it's own switch into the receiver and easily get 6-8 (10) minute flights as well as redundancy.

I think you are making too big of a deal that you are using Spectrum. With good quality low impedance 6V NiMh or A123 you would be just fine.\

The only other thing I would do if using only one battery would be to still run it thru two switches. Once again, this is for redundancy, a switch is more apt to fail than a battery.

exeter_acres

My Feedback: (2)

or even a quality LiIon set up...



yes, which plane is it for?

vasek

My Feedback: (4)

sorry it's for

CMPro Sukhoi

ST 2300 (glow driver) separate power pack

Graupner/JR DS8077 (2x) ailerons

Graupner/JR DS8077 (2x) split elev

Graupner/JR DS5491 (1x) rud

Graupner/JR (1x) STD thr

I am probably over cautious now but I lost a plane due to interference lately, thus the switch to 2.4

I have the "old" Spekrtum Rx which reboots lenthly at 3.8V (or 4.2V?)

Most of my planes now have Nicad setup, one has Nihms BUT i feel safer using Nicads

Charger> Triton I

I've read A123 are easier to maintain than lipos (no balancer needed) but maybe i should stay with 2 large Nicads in parallel (2 switches)

Thanx for helping,
V.