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Jan 30, 2013, 12:39 AM
Registered User
loquacious's Avatar
Question

Run Low Voltage Alarm plus LEDs


I want to run my low voltage alarm and LEds from my 3s battery balance connection. Is there an adapter that allows me to do this and if so where could I purchase one from?
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Jan 30, 2013, 12:52 AM
Registered User
loquacious's Avatar
Quote:
Originally Posted by squid10
Thanks but I already have the alarm and LEDs .. what I am after is an adapter so I can run both off the same battery.
Jan 30, 2013, 05:46 AM
Registered User
Mrhide's Avatar
you could certainly use this one
http://www.hobbyking.com/hobbyking/s...onitor_3S.html

...and plug in a JST connector for the LEDs?
Jan 30, 2013, 08:40 PM
Registered User
loquacious's Avatar
Quote:
Originally Posted by Mrhide
you could certainly use this one
http://www.hobbyking.com/hobbyking/s...onitor_3S.html

...and plug in a JST connector for the LEDs?
My LEDs are running off the battery balance plug., I also want to put a battery monitor on it too how can I run BOTH from the battery balance plug?
Feb 01, 2013, 07:42 PM
Registered User
loquacious's Avatar
I am guessing due to lack of responses that what I am trying to do cannot be done?
Feb 01, 2013, 08:29 PM
Flying Monkey
heli-yeah's Avatar
A couple of questions:
  1. What voltage LiPo are you using?
  2. Does your voltage alarm monitor each cell, or only the total pack voltage?
  3. Are your LEDs rated for the full voltage of your battery?
  4. Do you solder, or know anyone who can do it for you?
Feb 01, 2013, 08:37 PM
Registered User
Voltage display of total voltage and individual cells plus buzzer alarm when voltage drops to certain level are very common..

http://www.hobbyking.com/hobbyking/s...age_Alarm.html
Feb 01, 2013, 09:11 PM
Registered User
loquacious's Avatar
Quote:
Originally Posted by heli-yeah
A couple of questions:
  1. What voltage LiPo are you using?
  2. Does your voltage alarm monitor each cell, or only the total pack voltage?
  3. Are your LEDs rated for the full voltage of your battery?
  4. Do you solder, or know anyone who can do it for you?
I am using a 4500mAh 11.1v batter
The alarm I have measures each cell
LEDs are rated for full voltage
I can solder to some degree / also know someone who can solder
Feb 01, 2013, 09:12 PM
Registered User
loquacious's Avatar
Quote:
Originally Posted by sgg05158
Voltage display of total voltage and individual cells plus buzzer alarm when voltage drops to certain level are very common..

http://www.hobbyking.com/hobbyking/s...age_Alarm.html
Hi sgg0158

I already have the voltage monitor and the LEDs I am just looking for a way to run them both together. I thought there might be an adapter out there so I could connect both to the balance plug on my lipo
Feb 01, 2013, 09:28 PM
ParagonUAV
MayMayDay's Avatar
If the LEDs are rated for the 3S lipo, just add a JST or other connector to your power distribution board/harness. Run them directly from there and the battery alarm off the balance plug.
Feb 02, 2013, 11:12 AM
Flying Monkey
heli-yeah's Avatar
Quote:
Originally Posted by loquacious
I am using a 4500mAh 11.1v batter
The alarm I have measures each cell
LEDs are rated for full voltage
I can solder to some degree / also know someone who can solder
I have a few follow-up questions, but I will try to recommend a few options based on the more common set-ups that I am familiar with.

Assuming you have JST-XH balance connectors on your batteries, you could get something like this product. Simply cut away one of the male connectors, and excess wires, then solder it to suit your needs.

JST-XH Parallel Connector

Essentially you would be making a little bridge from the male, and female connectors, then you could "tap-out" the type of connector you need for your LEDS using the outside two wires (12V). (Same idea as the connectors linked below, that use JST connectors.) You would also need some heat shrink.

Another (solder free) option, could be to dedicate the balance tap to the voltage alarm, and use one of the products below to power your lights. (Again, assuming you use one, or the other type of battery connector...)

Deans connectors w/JST (male)

XT-60 connector w/JST (male)

Quote:
Originally Posted by MayMayDay
If the LEDs are rated for the 3S lipo, just add a JST or other connector to your power distribution board/harness. Run them directly from there and the battery alarm off the balance plug.
Using a distribution board is a good clean option, I have used that method in the past. Recently I have eliminated all distribution boards from my multi's, and started using a custom wiring harnesses fitted with taps for accessory power.
Feb 03, 2013, 12:59 AM
Registered User
loquacious's Avatar
Quote:
Originally Posted by heli-yeah
I have a few follow-up questions, but I will try to recommend a few options based on the more common set-ups that I am familiar with.

Assuming you have JST-XH balance connectors on your batteries, you could get something like this product. Simply cut away one of the male connectors, and excess wires, then solder it to suit your needs.

JST-XH Parallel Connector

Essentially you would be making a little bridge from the male, and female connectors, then you could "tap-out" the type of connector you need for your LEDS using the outside two wires (12V). (Same idea as the connectors linked below, that use JST connectors.) You would also need some heat shrink.

Another (solder free) option, could be to dedicate the balance tap to the voltage alarm, and use one of the products below to power your lights. (Again, assuming you use one, or the other type of battery connector...)

Deans connectors w/JST (male)

XT-60 connector w/JST (male)



Using a distribution board is a good clean option, I have used that method in the past. Recently I have eliminated all distribution boards from my multi's, and started using a custom wiring harnesses fitted with taps for accessory power.
Thanks for all the info .... I will give option one a go as I am not really keen on having another connection coming off the main battery lead. Probably being over cautious but the balance lead with parallel connector seems like a good option.
Feb 03, 2013, 03:19 AM
Posted as eflightdude 06-07
Quote:
Originally Posted by heli-yeah
Assuming you have JST-XH balance connectors on your batteries, you could get something like this product. Simply cut away one of the male connectors, and excess wires, then solder it to suit your needs.

<snip>

Using a distribution board is a good clean option, I have used that method in the past. Recently I have eliminated all distribution boards from my multi's, and started using a custom wiring harnesses fitted with taps for accessory power.
Hmm, I've got a 10 pack of the balance extenders, and I want to feed battery voltage to my Naze32, as it has a built-in voltage monitor. But I don't feel like unwrapping the electrical tale on my wiring harness right now, and this is a good solution until I get tired of plugging in two wires all the time. Thanks!
Feb 06, 2014, 08:35 AM
Registered User
I have run into the same problem, could you purchase a set of the 3s JST-XH connectors
http://www.ebay.com/itm/10x-3S-4-Pin...-/300931361267

And make a reverse of this cable (2 male 1 female)
http://www.hobbyking.com/hobbyking/s...2xJST_XH_.html

Then plug one end into the voltage alarm and the other into an adapter to power the LED's
http://www.hobbyking.com/hobbyking/s...ad_4_JST_.html


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