Search found 1262 matches

by hjns
Sep 14 2011 8:33am
Forum: Battery Technology
Topic: Lipo for the Wife-E-bike - userfriendly...
Replies: 5
Views: 782

Lipo for the Wife-E-bike - userfriendly...

Hi all, I just wanted to have some expert input on an idea. Background I closely follow the 12s2p LiPo pack kit including 12-channel BMS "Lite" Board thread, and I am anxiously awaiting a working model. However, it got me thinking... I am not an engineer, but I know how to use a soldering iron. I al...
by hjns
Sep 06 2011 3:14am
Forum: E-Bike Technical
Topic: Is modding 60V DC/DC converter to take 83V easy?
Replies: 14
Views: 1375

Re: Is modding 60V DC/DC converter to take 83V easy?

unless there's some reason you want to use that particular DC/dc converter you could use a normal laptop/external HDD adapter... The kind that plugs into a normal 110 or 240V outlet. All the ones ive tested so far work fine off 20s lipo, right down to my 71V lvc. nice and compact too. this is anoth...
by hjns
Sep 03 2011 3:56am
Forum: General Discussion
Topic: End of August Updates
Replies: 19
Views: 3692

Re: End of August Updates

Hello everyone! I hope I can use my accumulated IT skills for good, and help make ES more awesome. Please bear with me as I try, though, as my formal training is mostly in hardware design, not web development or IT. If you think I'm doing something wrong or could do something better, please let me ...
by hjns
Aug 24 2011 7:12am
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Re: Modding chinese ebike (gift) - any advice?

Thanks again for the great advice. I now have the confidence to start with this project. I will be shopping around and have some nice stuff delivered to me. No doubt I will run into problems. If I cannot find a good solution here on ES, I will post my question. So expect some nice questions coming u...
by hjns
Aug 23 2011 1:58pm
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Re: Modding chinese ebike (gift) - any advice?

Oh, and one more little item. That bike frame is not really suitable for a 2000+ watt ebike. Look at what we use in the pics section on our high speed builds. Lots of really stout frames in use, while yours was built for exactly 250w. But it will tolerate 1500w. Wow, Dogman, I have to say you sound...
by hjns
Aug 23 2011 8:11am
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Re: Modding chinese ebike (gift) - any advice?

The crystalyte 48v 25 amp controller you linked to above is what I'd suggest you start with. While it may be illegal on the street in Swiss, you will ride at speeds that allow you to appear to just be pedaling hard when you spot a cop. Well, as Switzerland is sooo safe, there are hardly any cops wh...
by hjns
Aug 23 2011 4:01am
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Re: Modding chinese ebike (gift) - any advice?

Hi all, This morning I opened the frame where the controller is located. The controller is Chinese (I presume), see below: controller.jpg I cannot read or understand the language, but analogue to my RC esc's, I would say the controller is able to handle 7A continuously, and 15A peak current. Anybody...
by hjns
Aug 22 2011 11:46pm
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Re: Modding chinese ebike (gift) - any advice?

1) not totally, this motor will give you ~25km/h on 48V, virtually if you want to double you speed, you need to double your voltage, you will need 24S setup for 50km/h. Motors got something named KV rate=rpm/V, but I suppose you already know it. HS will give you about 40km/h (or little less) at 12S...
by hjns
Aug 22 2011 4:42pm
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Re: Modding chinese ebike (gift) - any advice?

Hi all, Thanks for the very usefull links! I found the lipo noob thread. Got some more reading to do for ebike application. Draft shopping list now includes: High Torque Crystalyte Rearwheel motor. The Crystalyte website says these are limited to 25km/h . Do I assume correctly that, if I go 12S lipo...
by hjns
Aug 22 2011 1:40pm
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Re: Modding chinese ebike (gift) - any advice?

Hi all, Thanks enormeously for the advice. You guys are very quick to get to the point, and you have me enthused so far that I find it worth looking in a 12S Lipo config a bit more. Can any of you give a good pointer to a thread that gives some e-bike beginner's knowhow on going Lipo? For example: h...
by hjns
Aug 22 2011 10:50am
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Re: Modding chinese ebike (gift) - any advice?

Hi Parabellum and Philistine, Thanks for your welcome! Feels good to be received this way. Parabellum : I have no reference to evaluate whether the motor is “geared” or not. When I turn it back and forth, I do NOT feel any difference. Why is this important? For the brake therapy solution, I feel tha...
by hjns
Aug 22 2011 8:29am
Forum: E-Bike General Discussion
Topic: Cromotor + MethTek Monster 24FET + 20S lipo build
Replies: 311
Views: 45014

Cromotor + MethTek Monster 24FET + 20S lipo build

Attempt to create a structured knowledge base for noobs like me General questions: what do I need? What do I want? First read the different FAQs: ES FAQ by Ypedal 2011 Ziggurat beginner's info by ziggurat 2010 the FAQ at ebike.ca is quite comprehensive. check it out! Ypedal's considerations: Ypedal...