Search found 202 matches

by regmeister
Jun 02 2019 5:48pm
Forum: E-Bike General Discussion
Topic: Active pre-charge/inrush control
Replies: 733
Views: 81386

Re: Active pre-charge/inrush control

Perhaps someone reading this thread will find interest in this. In the comments, I read that the project was supposedly the winner of whatever contest they had going on. Solid State Precharge CoolMOS solution for automotive HV battery. Using CoolMOS the cost will be lower and the physical size too, ...
by regmeister
May 29 2019 11:11pm
Forum: E-Bike General Discussion
Topic: sdream
Replies: 0
Views: 124

sdream

Quite the successful campaign. "792% funded on April 22, 2019"

https://sdream.bike/

by regmeister
May 22 2019 10:05am
Forum: E-Bike General Discussion
Topic: "the one"
Replies: 16
Views: 910

Re: "the one"

Here's a version you can buy on aliexpress right now. A little cheaper display. Could probably find another model with a better one, https://www.aliexpress.com/item/16inch-folding-electric-bike-aluminum-alloy-folding-electric-bicycle-ultra-light-and-easy-to-carry-the/32997245938.html?spm=2114.searc...
by regmeister
May 18 2019 5:44pm
Forum: E-Bike General Discussion
Topic: "the one"
Replies: 16
Views: 910

"the one"

Didn't see this posted anywhere on ES. The world's lightest, 16” electric folding bike! The-One Half off on crowdfunding for the next few weeks. Considering it, but will likely pass. https://united-city-bikes.com/wp-content/uploads/2019/05/Modell-neu-1.png fwiw, I think it might be using the same mo...
by regmeister
Dec 15 2016 2:23am
Forum: Electric Aircraft
Topic: vLazair
Replies: 9
Views: 1477

Re: vLazair

by regmeister
Dec 15 2016 2:22am
Forum: Electric Aircraft
Topic: vLazair
Replies: 9
Views: 1477

Re: vLazair

by regmeister
Dec 15 2016 2:19am
Forum: Electric Aircraft
Topic: vLazair
Replies: 9
Views: 1477

Re: vLazair

by regmeister
Dec 15 2016 2:02am
Forum: Electric Aircraft
Topic: vLazair
Replies: 9
Views: 1477

vLazair

from Dale Kramer, of eLazair fame (see this thread , comes the vLazair He's presently working on a 1/4 scale model, and raising funds selling the 1/32 model. Contribute if you can... see the website for more info. http://www.vlazair.com/Images/QuarterScale-Full700.jpg http://www.vlazair.com/Images/v...
by regmeister
Jul 13 2016 10:09pm
Forum: E-Vehicles General Discussion
Topic: Romanian Go Kart with Turnigy
Replies: 12
Views: 1589

Re: Romanian Go Kart with Turnigy

I see he's built his motor.

by regmeister
May 24 2016 10:57pm
Forum: E-Bike General Discussion
Topic: Active pre-charge/inrush control
Replies: 733
Views: 81386

Re: Active pre-charge/inrush control

I ran across this, and see the circuit and explanation is available on Circuit Cellar.

X-Treme Inrush Current Limiter

Good to 40V. The layout is interesting.

Image
by regmeister
May 01 2016 11:15am
Forum: Battery Technology
Topic: A different approach to battery management...
Replies: 313
Views: 36310

Re: A different approach to battery management...

Hi fechter, I appreciate your checking. I'm not home, but I think the board is a 4.07a version. I think I'm ok re: the schematic, as there is one available in the "Charge Controller 4.0.7 to 4.0.7b Change Document". Actually, if you could post or PM the schematic, that would be appreciated. I'm look...
by regmeister
May 01 2016 8:43am
Forum: Battery Technology
Topic: A different approach to battery management...
Replies: 313
Views: 36310

Re: A different approach to battery management...

Does anyone have a copy of the "Charge Controller Assembly-Test Instructions-v4.0.7" file that they could post?

I can't seem to view the pdf properly on the one found in this message thread. Only the first page is visible.
by regmeister
Feb 18 2016 9:52am
Forum: Electric Aircraft
Topic: Crazy "Batman" Winch Question...
Replies: 6
Views: 1163

Re: Crazy "Batman" Winch Question...

I'm not trying to understand what you are trying to accomplish, but did you see this?

I believe their first iteration was crotch based.

by regmeister
Sep 03 2015 7:04pm
Forum: E-Bike General Discussion
Topic: Red Light Changer
Replies: 99
Views: 8450

Re: Red Light Changer

Triketech wrote:The vast majority of loop detectors used at intersections are capacitive systems.
Please show me some capacitive loop detectors. Afaik they are all induction based.

Not to say there isn't a capacitive factor.

I believe the main application for capacitive detection is in studfinders.
by regmeister
Aug 06 2015 10:15pm
Forum: General Discussion
Topic: ES Downtime Scheduled, Thur Aug 6th 12:00 PST
Replies: 31
Views: 4067

Re: ES Downtime Scheduled, 12:00 PST This Friday, site migra

AWS is kinda slow and expensive. Super scalable, though I don't know how important that is for ES. That said, I do use AWS, and it would be nice to read how you set it up. Depends totally on which instance type you go with. Compared to other hosts, you generally get less cpu, but more memory and di...
by regmeister
Jul 31 2015 7:39am
Forum: General Discussion
Topic: ES Downtime Scheduled, Thur Aug 6th 12:00 PST
Replies: 31
Views: 4067

Re: ES Downtime Scheduled, 12:00 PST This Friday, site migra

AWS is kinda slow and expensive. Super scalable, though I don't know how important that is for ES.

That said, I do use AWS, and it would be nice to read how you set it up.
by regmeister
May 15 2015 7:58am
Forum: Electric Aircraft
Topic: the Lotus
Replies: 4
Views: 1683

Re: the Lotus

by regmeister
May 15 2015 7:55am
Forum: Electric Aircraft
Topic: the Lotus
Replies: 4
Views: 1683

Re: the Lotus

by regmeister
May 14 2015 9:23am
Forum: Electric Aircraft
Topic: the Lotus
Replies: 4
Views: 1683

the Lotus

Under contract with NASA, Joby has developed a truly novel VTOL configuration: the Lotus.
http://www.jobyaviation.com/lotus/

Image
by regmeister
May 13 2015 7:25pm
Forum: Motor Technology
Topic: Why not make variable voltage system?
Replies: 26
Views: 2938

Re: Why not make variable voltage system?

I see my link was wrong earlier, as the page has frames. This is the one I wanted to share.

http://www.sunrise-ev.com/controllers.htm
by regmeister
May 13 2015 6:39pm
Forum: Motor Technology
Topic: Why not make variable voltage system?
Replies: 26
Views: 2938

Re: Why not make variable voltage system?

I forget the reasons why 4-speed didn't quite work for me. But I imagine reducing component count and number of connections was high on the list. Here's the proposed relay / diode layout. rectactor.jpg Relays are the circles in the sketch. There will be another contactor and kill switch, not shown. ...
by regmeister
May 13 2015 10:52am
Forum: Motor Technology
Topic: Why not make variable voltage system?
Replies: 26
Views: 2938

Re: Why not make variable voltage system?

That seems non-optimal solution given the prevalence of motor controllers available today. It would massively unbalance your pack and wastes energy due to the voltage drop across the diodes. Won't argue with you. Nearly purchased a controller several times. Don't see why it would unbalance the pack...