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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Can a Volt Watch plug directly to the battery?
07-15-2018 08:57 PM  3 years ago
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OneHoof

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Cold Spring, Kentucky

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Can a Volt Watch plug directly to the battery?
I have a new to me, Airstar Mongoose.

I just ordered a Volt Watch, which I always like to install in all of my rc helis for an extra margin of safety.

I think all of my channels (ports) on the Mikado VBar are plugged. (It is hard to see because VBar is mounted between the frame and under a bracket.)

This might be a dumb question.

But I am wondering... if my battery has an extra cable, can I somehow plug the Volt Watch directly to the battery to monitor the battery’s voltage?

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07-15-2018 09:19 PM  3 years ago
JuanRodriguez

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The Villages, Florida

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What battery ?? I believe that monitor is used for 4.8 V and 6 V batteries.....Been there, done that and old enough to know better.....
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07-15-2018 09:25 PM  3 years ago
OneHoof

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NOBS, NiMh 3000 mAh 4 cell 4.8 Volt, with an extra lead.

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07-15-2018 09:33 PM  3 years ago
JuanRodriguez

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Don’t see any reason why not ..... you may need an adapter to make the connection.....Been there, done that and old enough to know better.....
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07-15-2018 09:49 PM  3 years ago
OneHoof

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Where can I buy a double sided female connector?
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07-15-2018 10:08 PM  3 years ago
wjvail

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Meridian, Mississippi

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Solder two of these together.

http://www.buddyrc.com/futaba-compa...lead-300mm.html
"Well, nothing bad can happen now."
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07-15-2018 10:08 PM  3 years ago
chopper37

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Are you out of slots on your recv? Might be easier to just use a y connection
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07-15-2018 10:09 PM  3 years ago
OneHoof

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Cold Spring, Kentucky

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Yes. I think I am out of ports on VBar.

I don’t know how many ports/channels/slots a VBar has?

It is mounted upside down between the frame where it is hard to see and get to...
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07-15-2018 11:46 PM  3 years ago
BeltFedBrowning

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Kansas City

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I also just use a Y lead when I need another port for the Voltwatch.
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07-16-2018 12:03 AM  3 years ago
OneHoof

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Y lead connected to which channel? Where?

How do you correctly do that?
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07-16-2018 12:30 AM  3 years ago
OneHoof

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Cold Spring, Kentucky

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Okay.... here is my question.

If I have no more open channels on my VBar.

But, I do have an extra wire, lead from the battery.

Is that acceptable and safe to plug the Volt Watch directly to the secondary battery lead, to monitor the battery’s voltage?

Would it be accurate and work?
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07-16-2018 12:36 AM  3 years ago
JuanRodriguez

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OneHoof Okay.... here is my question.

If I have no more open channels on my VBar.

But, I do have an extra wire, lead from the battery.

Is that acceptable and safe to plug the Volt Watch directly to the secondary battery lead, to monitor the battery’s voltage?

Would it be accurate and work?
Unless I'm missing something, those questions have already been answered within the above replies......

You have two choices...... either use a Y lead into ANY of the channels available to you OR make up an adapter so that you can plug the voltwatch directly into the battery....

You're reading WAY too much into this !!!......
Been there, done that and old enough to know better.....
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07-16-2018 01:09 AM  3 years ago
BeltFedBrowning

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Kansas City

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Yep, voltwatch on a Y lead on any of the channels. The voltwatch will only use the Pos and neg in the Y lead. It is not wired into the control circuit.
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07-16-2018 01:20 AM  3 years ago
wjvail

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Meridian, Mississippi

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OneHoof Okay.... here is my question.

If I have no more open channels on my VBar.

But, I do have an extra wire, lead from the battery.

Is that acceptable and safe to plug the Volt Watch directly to the secondary battery lead, to monitor the battery’s voltage?

Would it be accurate and work?
Yes
"Well, nothing bad can happen now."
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07-16-2018 02:57 AM  3 years ago
Rojoalfa

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/
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It is not safe!!!

The Voltwatch must be install it after switch.

Doing such a connection, the Voltwatch will remain ON and it is very easy to forget to unplug.

/
Saludos cordiales,
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07-16-2018 03:00 AM  3 years ago
OneHoof

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Cold Spring, Kentucky

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That’s kind of what I suspected. Thanks.

How do you do the Y connector solution?
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07-16-2018 03:40 AM  3 years ago
Rojoalfa

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You only need a free port to connect your Voltwatch.
Remember to put the Voltwatch switch 4.8 or 6 volts depending on your batteries.

Y cable is a solution when you don't have that free port.
It doesn't matter where you connect the Y cable but I prefer to connect to cable from main switch.

/
Saludos cordiales,
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07-16-2018 09:16 AM  3 years ago
wjvail

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Meridian, Mississippi

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Rojoalfa It is not safe!!!

The Voltwatch must be install it after switch.

Doing such a connection, the Voltwatch will remain ON and it is very easy to forget to unplug.
Well I don't know if I'd personally install a voltwatch directly to the battery but to answer the OP's question, yes you can and yes it will work as intended.

You are right in that it will stay on but the thing only draw between 4 and 34mA. You could load up the car, fly for 10 hours, drive home and still not use 500mA- and that is worst case. These are very bright and since it's meant to be seen, presumably it's mounted where it is easily visible. I don't know if I would say "It is not safe" (3 exclamation points). But your point is taken.

I can't be bothered to plug and un-plug the thing in 5 times a day so I wouldn't install one direct to the battery. In fact, I don't install one at all.

https://www.towerhobbies.com/cgi-bi...XHDJ2#technotes
"Well, nothing bad can happen now."
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07-16-2018 02:12 PM  3 years ago
Jeff polisena

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westpalmbeachflorida usa

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Your fine as long as you disconnect battery so you don’t drain too low and damage battery . I make it a point to unplug or remove batteries from helis at the end of flying day .I stole it ,flew it and gave it back ;)
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07-17-2018 12:40 AM  3 years ago
Rojoalfa

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Very interesting points...

That is why different criteria you found when talking about rc helicopter.

1.- Internal combustion engine
2.- Electric motors
3.- External combustion engine (turbines)

So, base on your good points, I conclude...

It is relative... It depends...
On what type of helicopter you talking about.

That is why some points are good on internal combustion engine helicopter but very bad idea on electric helicopter.

/
Saludos cordiales,
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