Undocumented lead coming out of my new BBS02

[matics]

I've been a long time lurker here, gleaning all that I can on electrifying my Surly Big Dummy cargo bike. This is my first post. I just received a Bafang BBS02 kit with a build date from earlier this month. Inspecting the motor, I noticed a paired lead from the controller that I can't seem to find any info on. I'm thinking it may be for a gear sensor (which I also purchased), however, it is not terminated with a female higo connector. Can someone with more experience confirm? If this is for connecting a gear sensor, what can I do to make the correct connection? Thank you!

 

[matics]

I found mention of a similar lead on a bbshd from an older thread stating it was for a headlight. Has anyone seen this in a bbs02?

https://endless-sphere.com/forums/viewtopic.php?f=28&t=74511&p=1151191#p1125366

 

[matics]

I posted this in E-bike Technical and it didn't receive a response. I thought I'd try it in this forum.

I've been a long time lurker here, gleaning all that I can on electrifying my Surly Big Dummy cargo bike. This is my first post. I just received a Bafang BBS02 kit with a build date from earlier this month. Inspecting the motor, I noticed a paired lead from the controller that I can't seem to find any info on. I'm thinking it may be for a gear sensor (which I also purchased), however, it is not terminated with a female higo connector.

I found mention of a similar lead on a bbshd from an older thread stating it was for a headlight. Has anyone seen this in a bbs02?

https://endless-sphere.com/forums/viewtopic.php?f=28&t=74511&p=1151191#p1125366

Can someone with more experience shed light on the function of this connector? Thank you!

 

[tomjasz]

Another mind bender from the ever unpredictable Bafang. And the vendor says?

 

[matics]

I just heard back from the vendor. They confirmed that it is a 6v lead for a front light. Now, I have to look for a good 6v light to pair with this.

 

[Mündawg]

I just heard back from the vendor. They confirmed that it is a 6v lead for a front light. Now, I have to look for a good 6v light to pair with this.

Yes this connector is a 6v Headlight connector. Very usefull. I am in the process of building a custom headlamp for my bike light. The hiead lamp turns on when the BBS display backlight is activated.

 

[matics]

Yes this connector is a 6v Headlight connector. Very usefull. I am in the process of building a custom headlamp for my bike light. The hiead lamp turns on when the BBS display backlight is activated.

Do you know how many amps this connection provides? I was thinking of getting a USB led headlight and terminating it with the correct connector to see if it would work.

 

[tomjasz]

Yes this connector is a 6v Headlight connector. Very usefull. I am in the process of building a custom headlamp for my bike light. The hiead lamp turns on when the BBS display backlight is activated.

Do you know how many amps this connection provides? I was thinking of getting a USB led headlight and terminating it with the correct connector to see if it would work.

Multimeter?

 

[Ykick]

I recently bought a new Luna DPC-14 color display (awesome upgrade, btw) and it displays a headlight function when changing to night scene. My older controller doesn’t support it but would be a cool thing.

My totally blind guess is that it’s probably good for 500-1000mA or USB type loads? Might use a self-recovery fuse?

Of course, a clever enough Chimp could use the 6V to drive a relay/switch and power something much larger? Perhaps the main battery potential?

Best bet send a quick note to your vendor support and ask them if they know how much current it can deliver?

It certainly needs more documentation support.

 

[tomjasz]

certainly needs more documentation support.

Bafang needs more documentation support. Heck vendors struggle with their changes and unpredictability.. A shame really.

 

[Samd]

I just got the same in my shipment. Wonder about waterproofing.

Ykick - was it a luna specific display or a bafang display?

 

[Ykick]

I just got the same in my shipment. Wonder about waterproofing.

Ykick - was it a luna specific display or a bafang display?

I recently bought a new Luna DPC-14 color display...

 

[Mündawg]

I just got the same in my shipment. Wonder about waterproofing.

Ykick - was it a luna specific display or a bafang display?

As for waterproofing: I just bought a package of WaterProof Heat Shrink Tube from Amazon, cost about 20$ for the whole set of various diameters. It is different from normal heat shrink because it has some adhesive compound on the inside to seal out moisture.

 

[chilltrout]

I wonder if there are breakouts on the controller pcb for a light :lol:

 

[tomjasz]

- was it a luna specific display or a bafang display?

No such animal.DPC 10 is labeled Luna but a Bafang product, without a manual. A PIA, similar programming to a 5 button 965 if memory serves. I'm surprised it's such a hit. Mine still sits back in the parts box after a short trial. Other than color, meh. I'd be happy with the old easy to program C961 if not for the speedo fail. I have the model released just before the color too. But find the C965 easier to program. None have any real tricks or ground breaking improvements. I like the C963 too. Jeez, I hope they don't come out with another one. My tool box is full.....

 

[Ykick]

Of course it's made by Bafang but the color DPC-14 is labelled Luna. It’s a much much better handlebar switch (can actually use it with heavy gloves) and behaves quite differently than the old C961. PAS 5 (9) doesn’t apply full power/wattage like PAS 5 (9) does on a C961.

I bought DPC-14 as a troubleshooting aid, basically a spare display but quickly realized many benefits more than the snazzy color LCD. Much easier to program/adjust parameters for starters. As noted a better switch and the power levels were programmed more to my liking than what the C961 was doing with my BBS02.

DPC-14 Luna version always boots to PAS 1 and Luna already programmed the speed limit to max. Seemingly minor things but Luna refined out-of-box in several ways that I found useful.

 

[tomjasz]

Forgot all about this thread when the connector appeared on a bbshd. Old stroke brains...
But i do remember that none of the displays are made by bafang. All by another maker, fwiw.

 

[BeachRider2016]

I recently bought a new Luna DPC-14 color display (awesome upgrade, btw) and it displays a headlight function when changing to night scene. My older controller doesn’t support it but would be a cool thing.

My totally blind guess is that it’s probably good for 500-1000mA or USB type loads? Might use a self-recovery fuse?

Of course, a clever enough Chimp could use the 6V to drive a relay/switch and power something much larger? Perhaps the main battery potential?

Best bet send a quick note to your vendor support and ask them if they know how much current it can deliver?

It certainly needs more documentation support.

The USB port is only good for cellphone charging. It can not power a 1000mah led headlight with usb plug.

 

[fechter]

The headlight wire comes off the 12v dc-dc on the controller board. I don't think it could handle more than 500mA. It does not appear to have any protection other than the current limiter on the dc-dc chip.

 

[tomjasz]

Of course it's made by Bafang but the color DPC-14 is labelled Luna. It’s a much much better handlebar switch (can actually use it with heavy gloves) and behaves quite differently than the old C961. PAS 5 (9) doesn’t apply full power/wattage like PAS 5 (9) does on a C961.

I bought DPC-14 as a troubleshooting aid, basically a spare display but quickly realized many benefits more than the snazzy color LCD. Much easier to program/adjust parameters for starters. As noted a better switch and the power levels were programmed more to my liking than what the C961 was doing with my BBS02.

DPC-14 Luna version always boots to PAS 1 and Luna already programmed the speed limit to max. Seemingly minor things but Luna refined out-of-box in several ways that I found useful.

Still not made by Bafang, sorry for the necro response. I missed it until my recent read...

 

[tomjasz]

The headlight wire comes off the 12v dc-dc on the controller board. I don't think it could handle more than 500mA. It does not appear to have any protection other than the current limiter on the dc-dc chip.

I'm sorry for not having the knowledge to decode that. Could you elaborate? Not a good idea to use? If ok what sort of light would be a safe load? Thank you!

 

[fechter]

Like maybe a 3W light. I recommend measuring the voltage on it. The one I was tracing out was pre-blown, so no voltage.
To me it's not worth risking damage to the controller. I would just use a light with it's own dc-dc converter. I'm pretty sure 500mA is the limit based on the converter chip. Some of that is used for the controller, about 70mA.

 

[tomjasz]

Like maybe a 3W light. I recommend measuring the voltage on it. The one I was tracing out was pre-blown, so no voltage.
To me it's not worth risking damage to the controller. I would just use a light with it's own dc-dc converter. I'm pretty sure 500mA is the limit based on the converter chip. Some of that is used for the controller, about 70mA.

Just the fact it was a JST put me off given the location, but thanks for the explanation, especially the logic. It makes sense.