Search found 131 matches

by AstroKat
Jan 31 2017 5:03pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

Yes, I drove to Gardena to pick up a kit. I waited about an hour and, when I got home, the LCD didn't work.
by AstroKat
Jan 31 2017 4:49pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

999zip999 wrote:Luna cycle Si.
Do you own or work for Luna Cycle?
by AstroKat
Jan 31 2017 3:15pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

999zip999 wrote:Luna cycle Si.
What does this mean? When I Google it, I get a Luna Cycle bike that costs $1,899.95
by AstroKat
Jan 31 2017 3:04pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

I will post about Luna Cycle later... :roll:

What is a "Luna pack"?
by AstroKat
Jan 31 2017 4:16am
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

It's easy to say the lipos are cheap, but by the time you add up connectors, RC chargers, paralleling harnesses etc, it can be cheap and simple in the short term to use lead. I already had a lot of the RC gear but I'm wary of LiPos for a bike, due to the special handling required. Li-Ion battery pa...
by AstroKat
Jan 31 2017 4:09am
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

Btw, the return label from "AW International" arrived and the return address is Yescom! Do tell ... not a big surprise. Not much more to tell. This post began when I had some questions about a kit I purchased on Amazon from, and branded by, "AW International". Maybe "AW International" is Yescom's p...
by AstroKat
Jan 30 2017 9:58pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

OK, everyone breathe... :D Yes, I realize that SLA batteries are not the latest technology and that they have their own issues. So do LiPos (I have a LOT of LiPos). SLA's are very economical for experimentation, by orders of magnitude compared to Li-Ion packs. If anyone can propose a similar Li-Ion ...
by AstroKat
Jan 29 2017 1:15pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

Well, I'm thinking that now I have a 36v capable controller, I'll try three 10Ah batteries instead (there's a three pack on Amazon for $59). Only slightly more watt hours but maybe they will handle the current draw better. And I can add a fourth if it's not powerful enough for hill climbs. Still a f...
by AstroKat
Jan 28 2017 4:37pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

I remember messing with SLA before I got my first real ebike battery, my 48v sla would drop to lvc on the controller making it cut out and I solved it by just adding a 6v battery I series with them... I just found an unused 6v SLA that I bought a while ago as a spare for something. I don't know if ...
by AstroKat
Jan 27 2017 2:34pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

I just let the air out of the tire on the wheel to return. All of our cats fled… ;)

My partner replied: "It must be one really huge badass angry cat..." :D
by AstroKat
Jan 27 2017 12:58pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon... NOT

OK, so here's the latest... I went looking for other controllers for a variety of reasons. On my road test it was quite apparent that the motor was more than powerful enough for my teen, even with the issue of the low voltage cutout at the higher assist levels. He weighs 50lb less than me and I was ...
by AstroKat
Jan 27 2017 11:05am
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

Yes, but I don't inhale... :wink:
by AstroKat
Jan 27 2017 9:52am
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

The precharge resistor would be on a third connector that makes connection before the main positive, and at the same time as the negative. That makes sense, thanks! So once the main positive connection is made it's no longer in line, it's in parallel, and not interfering. Wow, this is turning out t...
by AstroKat
Jan 26 2017 4:43pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

999zip999 wrote:How about a inline pre-charge resistor.
I've seen these referred to as a "solenoid" - I'm more familiar with mechanical solenoids.

Is there a "pre-charge resistor" that can be added, inline, to prevent the arcing but that does not interfere with the normal operation?
by AstroKat
Jan 26 2017 2:47pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

LewTwo wrote:You would still have arcing and sparking but it would be on your handle bars :)
That would be a "feature"... :D
by AstroKat
Jan 26 2017 2:36pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

So, I just need a handlebar mount for this?
Controller switch.jpg
It's alive!!!
Controller switch.jpg (62.75 KiB) Viewed 1371 times
by AstroKat
Jan 26 2017 1:58pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

Interesting. I read the first page of posts. I'm surprised the controllers don't include the basic circuitry to handle this and increase the draw slowly at first, even if just for a couple of seconds.
by AstroKat
Jan 26 2017 1:14pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

I have a big update regarding the controller that I'm working on and will post later. In the meantime, a quick question: When I first connect the battery pack after the system has been resting a while, especially overnight, there's always a huge crack and flash and the battery connectors now have li...
by AstroKat
Jan 26 2017 12:53pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Safety issue
Replies: 15
Views: 1801

Re: Safety issue

Yikes! I'm not at all squeamish and have witnessed autopsies but that makes me cringe... :shock:

Thanks for the post!
by AstroKat
Jan 25 2017 10:35pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

LewTwo wrote:Have you seem DrkAngle's SLA vs Litium capacity comparison
I have now! :D

I was aware of this and it's really just an experiment to see if it's possible to upgrade a bike to an ebike for a couple hundred bucks. I now know I'll need lithium eventually, if my kid actually rides it.
by AstroKat
Jan 25 2017 9:38pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

I remember messing with SLA before I got my first real ebike battery, my 48v sla would drop to lvc on the controller making it cut out and I solved it by just adding a 6v battery I series with them... I just found an unused 6v SLA that I bought a while ago as a spare for something. I don't know if ...
by AstroKat
Jan 25 2017 10:32am
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

I find all of this puzzling because a 45Ah car battery, for example, can put out 450 amps or more, over 10C. Maybe it's time to start looking at lawn mower batteries... :D
by AstroKat
Jan 25 2017 8:28am
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

A lot of the SLA battery articles and comments in forums state that a fully charged battery will be 12.7v or 12.8v. The way I read the quoted section, the battery should be charged to 14.6v for cyclical use (which is what my Imax B6 is doing) and I've observed them return to 12.7v after resting. I b...
by AstroKat
Jan 23 2017 7:18pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

It has been a very long time since I dealt with topping up unsealed car batteries. I think it was a Triumph Spitfire in the 80's... :D
by AstroKat
Jan 23 2017 6:35pm
Forum: E-Bike Technical
Topic: AW kit from Amazon
Replies: 157
Views: 9176

Re: AW kit from Amazon

Yep, the Imax B6 takes it up to 14.6v and reports if the cells are not holding a charge.

p.s. it seems 13.6v is for the unsealed type (e.g. car and motorcycle batteries)