Introducing the BKB Xenith

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775

yes

1 Like
776

cheers

777

@frame @giek2000 — meaning that you’d jump the two pins highlighted in the pic above and connect the loop key inline with the positive or ground wire going between the ESC and battery?

778

yes and i suggest soldering a tiny wire for the MOM pins instead of using a jst connector

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779

Thanks! Is that suggestion about making sure the jumper wouldn’t rattle out?

One more question: does this disable the power switch or can they both be used together? If it doesn’t (meaning the key and switch can be used together), is doing that a bad idea for any reason?

780

kinda, a jst connector also works, its just when u have it in, u can’t close the cover

yes, shorting the MOM pins keeps the xenith in ON state when ever there is power. if u want to use loop key and the AS switch, then u can’t short the MOM pins, instead u will have to use an actual MOM switch.

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781

Could you clarify the bit about using a MOM switch?

I was thinking to use a loop key to have a quick and easy way to break the battery connection. I gather it’s commonly used instead of a switch because the latter is prone to failure.

782

the MOM pins is for wiring up a momentary button, which basically what the button does is shorting the two pins together, u can have a button / wire / metal string, all it does is shorting the two together to tell the AS part to let power go through, hence, esc turns on

i’ve heard Jared did some extensive AS test on the v2, it should be way more reliable now.

*AS = anti spark

2 Likes
783

tyty

Maybe I should just use the AS switch to start. You’re totally right about the testing, it was one of the main reasons this unit was appealing for me.

784

You could also just have the loop key in the circuit and then if it built in AS shits the bed you can just bridge the mom pins and use the loop key like normal right?

3 Likes
785

i tell u what, make the loopkey, just keep the XT90s forever there until the xenith AS breaks, then u still have a XT90s as backup “switch”

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786

Yeah, that sounds right. Plan confirmed. :+1:

787

Do you know that if the AS burn, we can still use a regular loopkey with the xenith ?

788

AS can break in two ways, either fail to open or fail to close, excluding it bursts into flames or pop like firework.

if its fail to open, aka always stays on no matter how u press the button, then loop key would solve that issue

if its fail to close, aka pressing the button basically does nothing, then u need to bridge certain two area together in the AS, but i would leave that to the expert to do that if that happens

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789

when does an AS fails normally fail? turning on/off the board or running high current through the board?

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790

both

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791

mine failed low speed low current while riding but connecting external devices may be a factor.

Also I have a v1 so I’ll show myself out.

792

Most of the time The inrush current ark welds the contact in the anti spark switch this means the esc is stuck ON and can’t be turned off. A loop key is a good back up if this fails.

I have the AS switch in my DieBieMS, unity AS pins shorted out to be permanently on and a loop key I never take out as a backup.

793

Aren’t most AS switches using MOSFETs and not mechanical contactors? MOSFETs do typically fail shorted IMO. They can blow apart later if the current is high enough to overheat them too much though.

5 Likes
794

are there any early signs of failure or is it just random and instant?