Search found 663 matches

by MJSfoto1956
Jul 01 2020 6:02pm
Forum: Motor Technology
Topic: Noob installing kelly controller, whats a precharge circuit?
Replies: 15
Views: 5468

Re: Noob installing kelly controller, whats a precharge circuit?

I recently blew out the stock chinese controller in my scooter and have decided to replace it with ... kellycontroller ... but I'm having some trouble understanding the "precharge circuit". I recommend a contactor with built-in pre-charge circuit like a Tyco EV200 which I use on my bike without any...
by MJSfoto1956
Jun 15 2020 4:18pm
Forum: General Discussion
Topic: US Supreme Court rules "fines can not be excessive"
Replies: 8
Views: 331

Re: US Supreme Court rules "fines can not be excessive"

markz wrote:
Jun 15 2020 12:33pm
BTW two of the top judges [sic] in the country are paid off by the Koch brothers.
Justices, not judges! Yup, Clarence and his wife are consummate grifters. No wonder they are fans of Trump.
by MJSfoto1956
Jun 15 2020 4:12pm
Forum: E-Bike General Discussion
Topic: Huge increase in shipping charges from China
Replies: 9
Views: 320

Re: Huge increase in shipping charges from China

MadRhino wrote:
Jun 15 2020 4:11pm
Did you really believe that Trump commercial war with China would be paid by the Chinese?
Or that a wall would be paid by Mexicans?

Nope. You are paying, and just started to.
+1

(Freedumb isn't free)
by MJSfoto1956
Jun 15 2020 4:09pm
Forum: General Discussion
Topic: I'm writing new forum software for us and others - any experienced php coders here?
Replies: 23
Views: 578

Re: I'm writing new forum software for us and others - any experienced php coders here?

That's a very interesting idea, which would allow the statistics engine to identify user bias. I do wonder how computationally expensive that is though. quickboards will be written to be fast as shit internally as a means of affording extra CPU time for the statistics engine that aids moderation an...
by MJSfoto1956
Jun 15 2020 10:04am
Forum: E-Bike General Discussion
Topic: Huge increase in shipping charges from China
Replies: 9
Views: 320

Re: Huge increase in shipping charges from China

Yup. Over the past year most things from China are more expensive no matter how you slice it.

M
by MJSfoto1956
Jun 15 2020 7:09am
Forum: General Discussion
Topic: US Supreme Court rules "fines can not be excessive"
Replies: 8
Views: 331

Re: US Supreme Court rules "fines can not be excessive"

Not sure why this is news (or why the Supremes took so long to weigh in) but the 8th amendment says basically the same thing: The Eighth Amendment (Amendment VIII) of the United States Constitution prohibits the federal government from imposing excessive bail, excessive fines, or cruel and unusual p...
by MJSfoto1956
Jun 15 2020 7:01am
Forum: General Discussion
Topic: I'm writing new forum software for us and others - any experienced php coders here?
Replies: 23
Views: 578

Re: I'm writing new forum software for us and others - any experienced php coders here?

If you want to extract nuances from the 1:n, n:1, & n:m relationships of the forum members (e.g. who likes who, who always downvotes x, who has the most connections, etc. i.e. classic "friend of a friend" stuff) you will want to store all the relationships in a graph. An RDF semantic graph can do wh...
by MJSfoto1956
Jun 09 2020 9:05am
Forum: Items Wanted
Topic: 20" one piece/disc hubmotor wheel
Replies: 6
Views: 173

Re: 20" one piece/disc hubmotor wheel

this is QSmotor's top of the line, 12k, 17" hub motor for motorcycles: https://www.qsmotor.com/product/17-inch-12kw-hub-motor/

They also make 5-bolt, 12k hub motors for cars: https://www.qsmotor.com/product/12kw-car-motor/

M
by MJSfoto1956
Jun 06 2020 6:33pm
Forum: Large EV General Discussion
Topic: Great read on Pre-WWII electric submarines
Replies: 15
Views: 2141

Re: Great read on Pre-WWII electric submarines

Well there is always the horrific story of the nuclear sub Thresher in 1963: https://en.wikipedia.org/wiki/USS_Thresher_(SSN-593)
by MJSfoto1956
Jun 06 2020 6:30pm
Forum: Battery Technology
Topic: Why Tesla dominates with superior battery technology
Replies: 7
Views: 322

Re: Why Tesla dominates with superior battery technology

Matt Gruber wrote:
Jun 06 2020 2:58pm
Munro spills the beans
https://www.youtube.com/watch?v=WigjD2CZAJE
I think the Germans have finally woken up to the advantage Tesla has. VW has gone full throttle to attempt to dominate. But by their own admission: "Tesla is years ahead of us". Gonna be an interesting next five years.
by MJSfoto1956
Jun 02 2020 6:50pm
Forum: Large EV General Discussion
Topic: Great read on Pre-WWII electric submarines
Replies: 15
Views: 2141

Re: Great read on Pre-WWII electric submarines

I had the pleasure of serving on a submarine during my enlistment from 1977-81. Thank you for your service. 90% efficient motors, gigantic batteries and very low RPMs. Pretty good stuff. For a very long time submarines were the most advanced and invested-in electric vehicles. http://rnsubs.co.uk/di...
by MJSfoto1956
May 29 2020 6:31pm
Forum: Forum Rules and Features
Topic: The future of our forum - facebook versus web forums
Replies: 129
Views: 31503

Re: The future of our forum - facebook versus web forums

Also, as soon as I can figure out how to get my picture files back from google photos (f-uped and deleted originals) I am going to re-populate the pics in my build threads and add new ones from some of the races Luke (LFP) and I went to. I think I will put them in the ES time line thread. Have you ...
by MJSfoto1956
May 29 2020 7:17am
Forum: E-Bike Technical
Topic: Can someone tell me if/how APT 96600 can run 300a
Replies: 4
Views: 217

Re: Can someone tell me if/how APT 96600 can run 300a

So, what is your opinions, experience and knowledge of the APT 96600 being able to utilize what the battery can put out 300a ? Would love to hear from any of you and if you have any questions about any relevant info I might have left out let me know please. I have the APT 96600 + QS 8000W V4 hub mo...
by MJSfoto1956
May 27 2020 7:11pm
Forum: General Discussion
Topic: Suggest someone other than Hobbyking
Replies: 46
Views: 1137

Re: Suggest someone other than Hobbyking

Here's what a brand new and unused 4s hardpack looked like about 30 days after arrival without being touched other than to check balance on day 1. Luckily I didn't trust RC lipo at the time, and stored the 20 packs I received on a concrete floor well spaced from each other. Otherwise our guest hous...
by MJSfoto1956
May 16 2020 6:32pm
Forum: E-Bike General Discussion
Topic: Is It OK To Leave The Bike Outside In Winter?
Replies: 17
Views: 342

Re: Is It OK To Leave The Bike Outside In Winter?

LeftieBiker wrote:
May 16 2020 6:17pm
Just to clarify because of the wording of the title: leaving a bike outdoors, even with the battery removed, is bad - it will rust and the plastic will deteriorate. A garage or shed, even an unheated one, is a large step up from that.
+1
by MJSfoto1956
May 16 2020 5:43pm
Forum: E-Bike General Discussion
Topic: Is It OK To Leave The Bike Outside In Winter?
Replies: 17
Views: 342

Re: Is It OK To Leave The Bike Outside In Winter?

My scooter/motorcycle has been in the shed since November. I put it in @ 74V. It is currently @ 72V. I did nothing to keep it warm or prevent sub-zero freezing. YMMV.

M
by MJSfoto1956
May 04 2020 4:44pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Puch Magnum Electric Conversion
Replies: 6
Views: 418

Re: Puch Magnum Electric Conversion

...from what i understand the hub mounts don't handle hills very well... My QSmotor V4 hub takes my 230lb scooter to 60mph on slight inclines. Much more downhill. 45mph going up very steep hills. Given the lack of space, I would strongly suggest a hub motor over a mid-drive. You will need every squ...
by MJSfoto1956
Apr 29 2020 8:08pm
Forum: E-Bike Technical
Topic: wiring 3 horns in series
Replies: 7
Views: 235

Re: wiring 3 horns in series

I wired two PIAA horns via relay to one of these 10A DC-DC converters: https://www.ebay.com/itm/Pro-Chaser-DC-DC-60V-72V-120V-Converter-Regulator-Step-Down-to-12V-180W-15A/223130946668 In fact I have three of these on my 72V bike. One for the horns, one for the lights, and one for everything else. M
by MJSfoto1956
Apr 27 2020 6:38pm
Forum: Vendor Relations Corner
Topic: Aliexpress blocks access to vendor licenses
Replies: 19
Views: 668

Re: Aliexpress blocks access to vendor licenses

...I believe they just create them in advance of time to give them "credibility", and when one store gets too negatively rated, they kill it off, and bring up an "old" store as the new front... I've been purchasing things from AliExpress for ten years. There are several subtle scams that can bite a...
by MJSfoto1956
Apr 25 2020 7:36am
Forum: E-Bike Technical
Topic: Programming APT AE96600 controller (UPDATE: don't buy..)
Replies: 169
Views: 20082

Re: Programming APT AE96600 controller (UPDATE: don't buy..)

I don't really intend to do wheelie or burn out (is it even posible with a hub motor?) Although I can't say that it won't be interesting. :twisted: Do you have the 3-speed switch installed? At the power setting, you will likely get decent burnout. At the Eco setting you'll likely double your range....
by MJSfoto1956
Apr 24 2020 3:12pm
Forum: Battery Technology
Topic: 21700 for low P count battery
Replies: 11
Views: 610

Re: 21700 for low P count battery

I will likely be rebuilding my current 50Ah pack in 2021 or 2022, with a goal of doubling its Ah. That being said, if I were to do it today I would seriously consider using QB26800 cells to achieve 100Ah. Previous thread here: viewtopic.php?t=98327
by MJSfoto1956
Apr 22 2020 5:39pm
Forum: Vendor Relations Corner
Topic: Power velocity?
Replies: 2
Views: 184

Re: Power velocity?

He posts occasionally here, but I have a couple of unanswered emails waiting his reply with no luck. Guess he just has his nose to the grindstone these days. As long as his product is in beta, I wouldn't count on prompt communication from him. Wish him luck and don't hold your breath.

M
by MJSfoto1956
Apr 19 2020 5:42pm
Forum: E-Bike Technical
Topic: Programming APT AE96600 controller (UPDATE: don't buy..)
Replies: 169
Views: 20082

Re: Programming APT AE96600 controller (UPDATE: don't buy..)

600A phase correctly pushed into your hub motor will make it everything but mushy. +1 what Larsb said, with a caveat: if your battery, or cables, and/or controller are not up to it, then you will likely need to back things down to 400A, 350A, 300A, or even less depending on your particular setup. M
by MJSfoto1956
Apr 14 2020 7:25am
Forum: Vendor Relations Corner
Topic: Aliexpress blocks access to vendor licenses
Replies: 19
Views: 668

Re: Aliexpress blocks access to vendor licenses

You likely wouldn't learn anything anyway. A huge number of so-called "vendors" are nothing more than popup webpages that list products (with no inventory behind them) that they hope they can ship to you. Because there is no inventory, and because these "vendors" won't even try to see if the product...
by MJSfoto1956
Nov 21 2019 8:42pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing (for my eZuma project)
Replies: 238
Views: 21753

Re: AliExpress battery pack unboxing (for my eZuma project)

I finally drafted a complete Bill of Materials for this CH250 forks project. About $87 more than I was hoping, but it is what it is. That being said, I have no doubt that Murphy is likely lurking around somewhere...
Trailing Arm Project BOM.1200.jpg
Trailing Arm Project BOM.1200.jpg (477.72 KiB) Viewed 1037 times