How-To: Anti-Spark XT-90 Loop Key

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camyboy   10 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by camyboy » Oct 30 2015 6:34am

sl33py wrote:You need to make sure your batteries are connected correctly in series. The middle + and - should pair up and you should have one red positive and one black negative go to your esc.

Don't connect until that's clear!
The two negative from the batteries go into each other using the black middle series connector (two male ends) than the red connects to positive side xt90 and exits through negative to esc
Black from the battery. Goes directly to esc.

akiraEC   100 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by akiraEC » Oct 30 2015 9:49am

camyboy wrote: The two negative from the batteries go into each other using the black middle series connector (two male ends) than the red connects to positive side xt90 and exits through negative to esc
Black from the battery. Goes directly to esc.
Ouch !!!
http://www.12voltbattery.info/index.php ... _vs_series

Trbt555   10 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by Trbt555 » Oct 30 2015 11:31am

Connect the numbers to eachother as follows:
Image
Shred.

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sl33py   10 kW

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by sl33py » Oct 30 2015 12:08pm

Trbt555 wrote:Connect the numbers to eachother as follows:
Image
Winner winner chicken dinner!

The top connector is correct. your black goes to the "bridge" (happens to be black). That bridge black goes into your red on bottom battery. This makes it in series. Think of AA batteries the bottom battery + touches the bottom - of the top battery -[===}+ -[===}+ which gives you 3v instead of 1.5v if you did them in parallel.

So your bottom connectors just need to flip over so that your two wires going to your ESC have the Red + on top, and Black - on bottom. If you plug the black wire to the ESC (3) into the Red battery lead (2) you are going to weld! No bueno.

Nice revision to the pic Trbt555.

camyboy   10 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by camyboy » Oct 31 2015 6:24pm

sl33py wrote:
Trbt555 wrote:Connect the numbers to eachother as follows:
Image
Winner winner chicken dinner!

The top connector is correct. your black goes to the "bridge" (happens to be black). That bridge black goes into your red on bottom battery. This makes it in series. Think of AA batteries the bottom battery + touches the bottom - of the top battery -[===}+ -[===}+ which gives you 3v instead of 1.5v if you did them in parallel.

So your bottom connectors just need to flip over so that your two wires going to your ESC have the Red + on top, and Black - on bottom. If you plug the black wire to the ESC (3) into the Red battery lead (2) you are going to weld! No bueno.

Nice revision to the pic Trbt555.
Wow, thanks. I acutally made all the connectors like that pic but my brain didnt wrap around how a postive and negative can go into each other. Heres my result http://imgur.com/KEfs5Fa and I was just wonder if i should just attach the spark to the ESC idk if it will effect if the spark is close to any wiring or. http://imgur.com/1jENKyZ

Trbt555   10 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by Trbt555 » Nov 01 2015 5:47am

When you put batteries in a regular flashlight you put them in "head to toe" ie (+) touching (-), same principle applies here.
It doesn't matter where you put the anti-spark as long as it's in the loop. Put it where it's most convenient to you.
Shred.

camyboy   10 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by camyboy » Nov 01 2015 10:48am

Trbt555 wrote:When you put batteries in a regular flashlight you put them in "head to toe" ie (+) touching (-), same principle applies here.
It doesn't matter where you put the anti-spark as long as it's in the loop. Put it where it's most convenient to you.
Hows this? http://prntscr.com/8xt7zq I think Im all set
Extra PIC if hard to understand - http://prntscr.com/8xt8p8

Trbt555   10 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by Trbt555 » Nov 01 2015 2:00pm

Go for it dude !
Shred.

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sl33py   10 kW

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by sl33py » Nov 01 2015 4:02pm

Trbt555 wrote:Go for it dude !
agreed. Looks solid. Connect it up and you should be gtg.

camyboy   10 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by camyboy » Nov 01 2015 10:21pm

sl33py wrote:
Trbt555 wrote:Go for it dude !
agreed. Looks solid. Connect it up and you should be gtg.
Good NEWS! BOARD RUNS! Measuring up dimensions tmmr and going to look at ways for enclosures
Whats a good ESC config? Im not sure what to put
Edit: ESC is stuck at ESC Model V1.00_121012 screen, presssed buttons but no luck of a change

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sl33py   10 kW

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by sl33py » Nov 02 2015 2:35am

camyboy wrote: Good NEWS! BOARD RUNS! Measuring up dimensions tmmr and going to look at ways for enclosures
Whats a good ESC config? Im not sure what to put
Edit: ESC is stuck at ESC Model V1.00_121012 screen, presssed buttons but no luck of a change
Let's discuss in your build thread and leave this for the loop key. glad your wiring is sorted. I'll post up in the latest thread w/ some troubleshooting steps that might help.


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sl33py   10 kW

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by sl33py » Nov 09 2015 12:16pm

beetbocks wrote:nice tutorial--
how do you find the antispark XT90 plug on larger 10S and above batteries? still works ok?
absolutely! I've used them with 8 and 12s with no issue. I don't have 10s, but 12s worked fine. My Series connector has the XT90 anti spark. Nice and compact and works great.

rmrf   10 W

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by rmrf » Nov 20 2015 1:16pm

I just got a crazy idea. Solder capacitors to battery pack. And never disconnect. Never get a spark. When you connect battery pack to ESC with a loop key / whatever, there will be no rush current, because capacitors are already charged. Thoughts? Probably someone already tried this, but I couldn't quick google it.

Need to keep wires very short however, see this thread http://www.rcgroups.com/forums/showthread.php?t=952523

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by Ham » Aug 29 2018 7:31am

Old thread but wanted to say thanks and if anyone is still watching this I assume this could be done with a simple lipo series connector and just use the loop key to finish the circuit?
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Re: How-To: Anti-Spark XT-90 Loop Key

Post by JanComputerman » Sep 18 2018 6:15pm

Actually a much cleaner way is to make your series cable that connects two battery pack in series have the jumper between the packs go to a connector of any type with a jumper resistor soldered to the connector and wires. The resistor charges the controller caps so pick a proper value and power rating like 1 watt 5 ohms. Then plug in a matching connector that you are using that has a wire soldered across the contacts which completes the series jumper between the packs with the plus wire on one pack and the minus wire on the other pack going to the load/controller. The jumper connector that shorts the charge resistor could also be a heavy duty switch. Having the wires going to the connectors in this way keeps them straight in line and easy to grab and pull to disconnect.

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Re: How-To: Anti-Spark XT-90 Loop Key

Post by JanComputerman » Sep 18 2018 6:19pm

rmrf wrote:
Nov 20 2015 1:16pm
I just got a crazy idea. Solder capacitors to battery pack. And never disconnect. Never get a spark. When you connect battery pack to ESC with a loop key / whatever, there will be no rush current, because capacitors are already charged. Thoughts? Probably someone already tried this, but I couldn't quick google it.

Need to keep wires very short however, see this thread http://www.rcgroups.com/forums/showthread.php?t=952523
Yeah the caps need to be electrically close to the controller output FETs for them to work. Plus keeping caps across the batteries will slowly drain the battery through cap leakage and if a cap failed ... Poof!
But keep thinking!

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