Endless Sphere

Unless the outer casing you use on the setup completely constrains the cells, vibration may eventually loosen them so they can move around, and heating/cooling may allow them to move very slightly within their heatshrink wrappers. If that happens, they may either split the wrappers or wear thru them...

I think Hyena may have done something like this on one of his bikes. JonesCG may also have experimented with this. But it was quite a while back. There was some discussion in one of the Fechter-Goodrum BMS threads about it, but I don't recall which one. It might even have been the beginnings of the ...

By "cost" do you mean monetary, or electrical? The former, probably a few dollars. The latter, a few tenths of a volt, but this varies with the amount of current flowing thru the diode (different for different ones, but higher volt drop across diode with higher current). Also, some watts o...

That's a nifty chip, and in the hands of the right designer and builder, would be great. But the way my hands work (or don't, really), there's no way I could solder the little SMT leads (sometimes I have trouble with thru-hole stuff, these days). If I managed to not bridge them all together, I'd pro...

My intentions for the key switch would be to have 1 key and 1 kill switch basically. Just like a normal motorcycle, I would like the key switch probably to precharge the resistor and get things "going" and the kill switch would be the on and off for the motor in sense. I like this option ...

First, given your statements so far, I'd actually go with Motomech's advice, of leaving the existing bike alone, and then simply building a whole new bike that does things the way you want them to, and then perhaps selling the other one to pay back a small part of what development cost. ;) That said...

Note that any charger you carry in the bag will very likely have to be taken out of it to be used, to prevent excessive heat from damaging charger or battery (or bag!). I think your best bet, though not as thin as you would prefer, at about 1.5", for a reliable portable charger for 84v that's t...

I assumed it was a larger type of vehicle, so that's how I filled it out. There may be other things that were assumed based on each survey-filler-outer's ;) personal experiences, so I expect your data up to now is likely to be contaminated due to insufficient clarity of questions. Might require reth...

john61ct wrote: ↑

Feb 27 2021 5:02am

The modern world now tolerates, if not celebrates, neuro-diversity.

Not really. But I force myself upon it anyway.

does this also somehow work on controllers without pas or display connection (like sabvoton 72150) or is it just for controllers with pas to expand the setting options ? All this device does is create a throttle signal from a cadence PAS sensor, primarly for controllers that have no PAS input but d...

please help i conected all correctly and when i move the "imans" the motor runs but don't stop... and when i stop moving the "imans" the motor runs and stops again and again... red led flashes... i don't understand im desesperate :c i was 4 hours trying to fix it but nothing i c...

I have an off-the-wall concept for analog outputs: digital potentiometer Most of these are resistor ladders with anywhere from 100 to 1024 rungs ( pun intended ). The current limits are extremely low so one would likely need to feed it to a op-amp or transistor to be useful. I considered this metho...

About a year ago I was working on a similar project - https://github.com/thorlancaster/electric-bike-controller . It was a much more complex project than this. It served as a replacement as a cycle analyst, not an addition to it. It also communicated across several Arduinos via an opto-isolated Ser...

2wGlider wrote: ↑

Feb 27 2021 12:35pm

Ok, but if I disconnect the throttle connector I can´t turn on the controller unless I short the wires that go to the throttle switch. I´ll try that.

Then the most likely problem is that switch, itself.

Some time after asking this question the problem suddenly disappeared by it self for no apparent reason. Which meant I had no reason to look further and forgot everything about this question. I recently had to swap some of the bearings in the motor and after putting it back to together the problem ...

FWIW, most of the mobility scooters are 24v (around 28-29v full charge, around 20v empty). You'd need to check yours to be sure, before you go any farther with your battery search. Those that use four 12v SLA usually wire them as 2S2P, so if you have four 12v 20Ah SLAs they are probably wired up as ...

If anyone knows where to source an electronic brake lever with an integrated switch, pls do let me know. spent some time on Aliexpress with no success. If you mean a standard "ebrake lever" there are dozens of versions (probably thousands), of two basic kinds. The first kind uses a regula...

Last week the battery suddenly died during a ride. I say "died" but if I turn it off and wait for a while, when I try to turn it on again and press the button to check how much charge is left on it, 4 lights out of 5 will show as green, and a few seconds later it will turn off again. Assu...

Some general troubleshooting thoughts: If it's something that suddenly started happening (when previously to that sudden point it was always behaving consistently correctly), that typically indicates either a vibration/shock-induced connection problem somewhere, or water intrusion that caused a conn...

I presume this statement, which is on a page by itself, with just buttons for Yes and No: A crash includes impact with any vehicle type (car, bike, another scooter, etc.), impact with a pedestrian, or any event in which you sustained injuries at or above the severity of an abrasion, bruise, or sprai...

Would need to know the current (amps, A) that you need from the charger to give specific recommendations. However, I don't know of any 1" thick chargers (or LED PSUs) off the top of my head. Vicor (and other places) do make very thin DC-DC converters, but most of them need fairly serious heatsi...

If there is interference from a hubmotor actually in the frame of the bike far from the motor itself, it might mean teh motor has a phase shorted to the stator, which then connects electrically to the axle and then the frame, so it's sending electrical garbage signals out like a big antenna. IF you ...

Because slow speeds at higher power levels can be death to a motor system that is actually setup for higher speeds, you're going to want to be sure the specific motor/etc combination you'll be using is good for the situation you're wanting to use it in. If it has a shiftable transmission between the...

Oh, so i can't go 48V DC to 24V DC? damnit. Sure you can. Just not with a transformer, if that is what you were describing (you still haven't clarified various things). Whether that will do what you want is another matter, as noted in my other post. I am not so convinced that bypassing a BMS to all...

As far as the key switch item as that seems to be the big ticket item on my diagram as I have it in multiple places. The main portion on the right hand side was from the controller's manual. They had the key relay in series with the contactor per their requirements. What would your thoughts be on t...