RunRyder - AR7000 voltage supply range ??????

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Radio - JR & Spektrum DSM > AR7000 voltage supply range ??????

Yug
rrProfessor
Location: UK. Herts

I've been trying to find the official info but without much success

Anyone ?

04-21-2007 Over year old.

Divot
Veteran
Location: Mesa, AZ

I have had little luck as well.
XPS seems to know something we don't

http://www.xtremepowersystems.net/index.php
Scroll to the bottom.
They are probably basing this on the ar6100 specs
which are posted on Spektrum's site.

04-22-2007 Over year old.

Eury
rrProfessor
Location: Ankeny, IA, USA.

The videos on the Horizon site specifically address it. I forget exactly what the low end is (IIRC 3v), but the high end is 9v. They say that it can run on a 2s lithium without a regulator.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

04-22-2007 Over year old.

Boidman
Key Veteran
Location: home

Grabbed from elsewhere:

Quote
I called Spektrum product support today and was told about a low voltage reset that can happen if the receiver sees a momentary voltage of 3.2 volts. Product support told me that the receiver would go into a re-boot if this voltage is seen by the receiver, the receiver would not work until it completed the re-boot process, that takes seconds to complete.

Paul Beard wrote:

Quote
"They already can handle a 2S lipo receiver pack. The max receiver input voltage is 10V."

04-22-2007 Over year old.

Yug
rrProfessor
Location: UK. Herts

The Spektrum site seems to have naff all on these figures.
The reason I raised this question is because a guy at my field who has about 10 of these AR7000s reckons the lower voltage is about 4.7v. IT WAS ALLEGED

that with a voltage of less than this, the AR7000 resets. Now of course, before I bung these 7000s in my more expensive helis, I was going to try it in my thrasher which runs off 4100mAh 4 cell NiMH. With heavy loading, it's not hard to imagine minimum voltages of perhaps 4.5v. It seems a PITA to have to upgrade this machine to Lipos and Regs just to checkout the AR7000. Perhaps I should settle this with some decent bench tests and a variable PSU.

04-22-2007 Over year old.

Paul Beard
Senior Heliman
Location: San Jose CA

The AR7000 voltage range is
3.5 to 10V

Paul

04-22-2007 Over year old.

HOMEPAGE

Yug
rrProfessor
Location: UK. Herts

Paul Beard - very many thanks for your reply.
I'll of course check this out on the bench before installing and inform the guys at field as to the voltage range.
There's nowt like fact

One chap has the AR7000 installed in his whateveritscalled plank which clocks 240mph, I regularly see him fly this thing into the clouds ( I can barely see it even before it gets there), and there seem to be NO range issues.

04-22-2007 Over year old.

MJA
Key Veteran
Location: Cumbria-UK

For the possible voltage dips ie high current loads on a 4 cell NIMH,
is this where the 4700Uf 10V capacitor should be used?
Or is this just for the cars

http://www.spektrumrc.com/Products/...?ProdID=SPM1600

04-22-2007 Over year old.

Paul Beard
Senior Heliman
Location: San Jose CA

Quote
For the possible voltage dips ie high current loads on a 4 cell NIMH, is this where the 4700Uf 10V capacitor should be used? Or is this just for the cars

Just for 1/12 scale, 4-cell cars.

Paul

04-22-2007 Over year old.

HOMEPAGE

Yug
rrProfessor
Location: UK. Herts

Depends what servos you are using as well as the impedance of the cabling/connector to the battery. Probably the 1st thing to do is replace the power cabling with something like 19A finestrand cable and a deans connector. This will alleviate some of the requirement for a big reservoir capacitor due to reduced voltage drop. However, if you use a low esr capacitor, this will reduce the HF noise, although I expect the AR7000 will incorporate decent decoupling to cope with these short term drops.

04-22-2007 Over year old.

Wyn
Senior Heliman
Location: Oregon, USA

Thanks for the voltage info Paul. I was looking for it too. Thought it was probably rated ~3.5 volts, but someone was telling me 4.5, which is ridiculous.

Wyn
VoltMagic

04-22-2007 Over year old.

Yug
rrProfessor
Location: UK. Herts

Come to think of it, What is the voltage range for the DX7 ???????????
Just wondering whether I could use 3 lipos to reduce the back end weight of the tx to help improve its balance.

04-22-2007 Over year old.

lloyd
Key Veteran
Location: Port Elizabeth,South Africa

Its been proven that the DX7 reciever can not run on even 6v as my friend got his DX7 and we installed it on his trex 450 SE but forgot to disconnect his medusa BEC on the esc as it was under the trex.Powerd it up and NOTHING.We were confused until we took off his 6v medusa and WALLA.............it worked .........

Just some usefull info

lloyd

04-22-2007 Over year old.

Eury
rrProfessor
Location: Ankeny, IA, USA.

Huh? So you are saying that your friend's AR7000 wouldn't run on 6v? Impossible. I've run mine of 4 cell packs run down to 4.6V in a profile, all the way up to 2s lithiums unregulated (8.4v fully charged), wihtout a hiccup. Your friend has something else wrong with his setup, it's not the receiver.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

04-22-2007 Over year old.

midwestpilot
Elite Veteran
Location: Crystal Lake, IL

Oh no Nick....

People wound not dream of coming on here and making bold inaccurate statements.. never happen!

By the way.. I heard from a guy to heard from this guy who was drunk and talking to a mouse an he said.......

In life there is no spacebar!

Rich Erikson AMA 6175

04-23-2007 Over year old.

HOMEPAGE

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Radio - JR & Spektrum DSM > AR7000 voltage supply range ??????

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