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HelicopterAlignOther › Battery voltage level indication in Trex600N
12-02-2007 05:18 AM  10 years agoPost 1
viperviper

rrApprentice

Australia

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hey,

just wondering how u guys monitor the lipo batt level, while the heli is flying? I'm so used to the Voltspy LED indication lights in my previous nitro heli... not sure if i can use back the same LED indicator knowing that the battery is a 2S1P lipo..

Currently using 2S1p 2500mah 7.4V Flt power evolite lipo with Fromeca Arizona Regulator, with 611 and digital servos, the battery seems to run out fast, while the readout in the 611 amp seems to read 4.9 V all the time and without any drop in the voltage readout in the 611 amplifier.. I was surprised to see that abt 2200ma was subsequently put back into the lipo during the charging.. Really dun wish to hit the situation when there will be a sudden cut of the power-supply in flight and have to head for panic auto just becos there is no battery level indication on the heli that can be visible in flight...

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12-02-2007 05:23 AM  10 years agoPost 2
3D WASP

rrVeteran

Home of the Reagan Library, CA

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Get an 8-ball voltage checker from fromeco. http://www.fromeco.org/aaccessories.htm (scroll down) You simply just plug it into the "check" lead from the Regulator, it puts a 1 amp load on the battery and tells you the voltage. I can get 5 flights per battery (Relion 5200mah) I stop flying when the battery goes under 7.60 volts under a 1 amp load, just to be safe. I find each hard 3d flight (6 mins) takes about .12 volts from the battery

Timing is everything

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12-02-2007 05:41 AM  10 years agoPost 3
george0079

rrElite Veteran

USA

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http://www.heli-world.com/detail.aspx?ID=404

This one is good to 8.4V

Hell... I can fix that.
Uh oh..
Nope.
It's ***ked!!!
RE-KIT!!!!!

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12-02-2007 09:00 AM  10 years agoPost 4
JRjoe

rrElite Veteran

Jonesville , IN USA #1

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Sentry LiPo/NiMH Capacity Gauge

Check this out. I just got one about a week ago and it works great.

http://www.horizonhobby.com/Product...?ProdID=DYN4062


JRjoe.....
Indoor plumbing??? No, we don't need that!!!

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12-02-2007 12:18 PM  10 years agoPost 5
Droid

rrElite Veteran

Deep down in the Southwest- UK

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As a rough guide 300 mah per flight, if you fly 7 times and put 2200 back in your pack then i would say that was normal, if you are only having 3 or 4 at that usage then you probably have some binding going on somewhere.

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12-02-2007 02:11 PM  10 years agoPost 6
MasterCrasher

rrApprentice

Not sure.

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Does the Sentry put a load on the battery?

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12-02-2007 02:51 PM  10 years agoPost 7
z11355

rrMaster

New England

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with Fromeca Arizona Regulator, with 611 and digital servos, the battery seems to run out fast, while the readout in the 611 amp seems to read 4.9 V all the time and without any drop in the voltage readout in the 611 amplifier.
You don't seem to be clear on the operational concept of a voltage regulator.

as noted, get yourself a loaded voltmeter like the 8ball, use it before
every flight @ 1Amp load and stop flying when it reads 7.0-7.1v.

2200mA is the absolute limit of a 2500 rated battery. You usually get
80-85% of rating.

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12-02-2007 03:58 PM  10 years agoPost 8
viperviper

rrApprentice

Australia

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With this LED indicator or the digital readout indicator when plugged into the rx, won't it reads almost constant voltage of ard 6V since i'm using the regulator?

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12-02-2007 04:13 PM  10 years agoPost 9
george0079

rrElite Veteran

USA

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Use, or make, a "Y" connector and plug it in before the reg. I'm not familliar with the fromeco, and how the "Check" lead works. If the lead has a constanstant voltage supply, you can plug the voltage monitor in to that.

Hell... I can fix that.
Uh oh..
Nope.
It's ***ked!!!
RE-KIT!!!!!

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12-02-2007 04:19 PM  10 years agoPost 10
z11355

rrMaster

New England

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you really do not need to check the voltage during flight.

check it beforehand and if it's > 7.1-7.2v, you're good to go.

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12-02-2007 04:36 PM  10 years agoPost 11
viperviper

rrApprentice

Australia

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for the 8 ball checker, how long will this device load the 2S lipo battery? as long as it's connected.. won't it further deplete the battery juice? so if it reads 7.1 or 7 volt, is it still good to go for one more flight?

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12-02-2007 05:10 PM  10 years agoPost 12
blbills

rrKey Veteran

Provo, UT

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I have always wondered about the accuracy of the voltage indicator on the amp of a 601 or 611. I don't have a regulated setup yet, but I was wondering if the amp voltage can be trusted for a ballpark estimate? Is it reading the voltage under load? Anyone with some electronics expertise please chime in...

Thanks

Brian

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12-02-2007 06:02 PM  10 years agoPost 13
baddynergy

rrElite Veteran

sierra madre, ca- usa

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The 611 amp on an arizona reg WILL ALWAYS READ 4.9. It is called a regulated 4.9 for the gyro. It will never read higher. Unless you bypass the gyro hook up and go to the Rx with the gyro leads.

The 8ball checker is ideal for you. It is very accurate and will let you know what it is a no-fly situation.

**Unattended children will be givin a shot of espresso and a puppy**

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12-02-2007 06:04 PM  10 years agoPost 14
baddynergy

rrElite Veteran

sierra madre, ca- usa

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And yes the Arizona does have a check- charge lead from it. That is where you should be taking your readings from.

But it is good to know that your tail servo is always at the v-rating it is supposed to be at.

I have to ask, when you put back 2200mah, How many flights did you have that day??

**Unattended children will be givin a shot of espresso and a puppy**

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12-02-2007 06:07 PM  10 years agoPost 15
baddynergy

rrElite Veteran

sierra madre, ca- usa

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The info you need about the 8-ball;

The NEW 8 BALL

The Fromeco Load Checker is a buttonless 1.0amp to 1.5amp load checker. We have designed our new Load checker to be about as simple as they come. Plug in your battery and wait for readings. We named the 8BALL after those little fortune telling, question answering toys that look like 8BALLS. Unlike the toy 8BALLS, Fromeco's 8BALL gives you the right answer every time.

* Displays the Unloaded DC Voltage of your Relion Battery Packs
* Displays Voltage under a 1.0amp Load
* Displays Voltage under a 1.5amp Load
* No fly warning at 7.0 Volts under a 1.0amp load
* NEW FEATURES
* New 8 Ball goes into a Digital Voltmeter mode after the Load checks have completed allowing pilots to now adjust their Fromeco Regulators with the new 8 Ball load checker.
* New 3 Digit LCD, now reads to .01VDC.
* Display readable in sunlight.
* New small size, about the size of a deck of cards.

Straight from their website

**Unattended children will be givin a shot of espresso and a puppy**

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12-02-2007 06:22 PM  10 years agoPost 16
Zaneman007

rrElite Veteran

Texas - USA

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I use the 8 ball(voltage tester) before every flight.

Here is how it works. You plug it in the charge port. It reads the voltage, unloaded. Then it applies a 1 amp load, for a few seconds, then it resets(no load) for a few seconds, then it applies a 1.5 amp load for a few seconds. The meter shows the voltage and the load at all times. After it is through with the 1.5 amp load, it is a normal voltmeter.

Oh, if the voltage drops below 7.0V on a 1 amp load it will flash "NO FLY".

I like it.

It is part of my preflight routine, and one less thing to worry about.

Old Guys Rule!

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12-02-2007 11:30 PM  10 years agoPost 17
MasterCrasher

rrApprentice

Not sure.

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I'm sold.

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HelicopterAlignOther › Battery voltage level indication in Trex600N
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