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  1. D

    Advise on brushed DC Motor controller (searching ) please ?

    i just read that he controllers on razor scooter are ohm´ed / potted so a 36v bladez-controller with 5k ohm throttle could be worth a shot.
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    Advise on brushed DC Motor controller (searching ) please ?

    the esr controller can´t , i allready figured this of postings over in the gopednation-forum. i am trying to gather a blown one for experimenting since i don´t wan tto blow a 229$-part with my soldering "skills". if i wanted to mock up the existing esr board it would be like upgrading the caps...
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    Advise on brushed DC Motor controller (searching ) please ?

    In order to upgrade a 24v 750 watt setup to 36 volts ( on 12-12 or 12-20 sla´s most probably, so don´t mind the final connectors) on a brushed dc scooter motor, what would be the recoomendable controller if ´the built should remain on a somewhat feasable budget ( no kelly etc controllers) and...
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    Thank you in advance spam bidder!

    this is ho i sell my hobby stuff on ebay, far too many deadbeat bidders on regular auctions.
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    Thank you in advance spam bidder!

    i am using a Bosch "exo2 electric screwdriver with one of these batteries since 2005, the tool has been sitting o standby chaarging for months and has been in a box with no charge for more than a year and still works like a charm and holds medium-range capacity quite well. good battery, and the...
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    good offering ( ebay) ?

    Since my plannings about having a 24" e-bike or scooter setup with hubmotor (Schwinn stingray or giggler scooter, these types) went into the stage of sourcing parts i wonder if someone has experience on the products of bay-seller "sannykung" and his kits like that example...
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    Any1 know of ebay seller wincentling?

    nope, without knowing more details, i´d be willed to place bets emma is a secretary of a asian trade center at which all kind of "agents" offer their tradeware. as long as "emma" or the seller are located in singapore or taiwan this is fine ( they are still getting their hands axed away and...
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    Any1 know of ebay seller wincentling?

    i made good experience with the ebay-seller 2hobby-dream" ( the name may be slightly different) of china, on eof his main businesses is selling readymade and nicely made battery packs from 1-7 8 8 on request) A123 LifePo 4 cells of Dewalt-packs that where returned while in warranty. he matches...
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    Cheap NEW Li-ion Sony and Panasonic anyone ?

    these panasonic are lagging for available info about regular charging and discharging current in the internet, but since i found info that they are approved and tested in spacecraft and satellite usage and had the outstanding best voltage output stability even in severely changing temperatures...
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    Cheap NEW Li-ion Sony and Panasonic anyone ?

    thanks for pointing that out´i did not do checking on those. the panasonics look like small versions of the industrial square packs, mabye their characteristics are better ? their physical seize and form is charming somehow.
  11. D

    Cheap NEW Li-ion Sony and Panasonic anyone ?

    as the thread title says, i stumbled across a offering of agerman ebay powerseller of pc parts who has badges of replacement battery cells overstocked and sells them for dirt-cheap with very reasonable shipping prices ( flatrate 4 €/ euros germanwide no matter how many) all batteries are...
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    Toyota Announces Segway Killer: The Winglet Personal Transpo

    i like the Sony; the small footprint will allow to take it ith in the tram or bus and to park it below a desk in a tiny cubicle. Sony allways has up stuff engineered for masses but sold in very small numbers like the rollibot and their earlier umpc´s, no doubt this will find it´s users. a...
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    Sport EV & delivery EV

    bmw has made mayor alternation sin their firmware layout the last years, i doubt there´s much more accessible than the wipers or lightening. there wasa like 2-3 years old thread about some north-europeans that intended to convert a 5-series bmw, but i didn´t follow up on this. the company...
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    Peak Lithium - the original study

    similar things have been said and are said about the internet. i believe tht the first few years o ev-booming will not only bring a ride in lipo price but also a revival of the good old zebra batterie on the more heavy cars and get the nau-tube research quite some headwind alongside with fuel...
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    (Was) Honda Civic Hybrid goes 100,000 miles with no problems

    the engine management of the different cars will be different, too. you´ll need someone that can read, understand and alter the firmware settings ( aka knows about the type of assembler speech used and understanding the singular value´s meaning for the operation), if pickin the right values...
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    .5B for Tesla (6B Ford, 1.6B Nissan)

    since tesla is held by Daimler at 10% share they should tart unsing some of their patents and other alike property, a trike that can lean into corners was allready built in design study stage with mercedes ( yes, joystick-steered in a fashion that i could be homologated). aslo, the mcc smart...
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    Powering Micro Sub

    it´s not the same design, but maybe someone in europe is interrested: private sub to sell on ebay ( not mine): http://cgi.ebay.de/U-Boot-Unterwasser-UBoot-Mini-Tauchboot-Forschung-NEMO_W0QQitemZ160352146013QQcmdZViewItemQQptZSonstige_Boote?hash=item2555bb925d&_trksid=p3286.c0.m14
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    (Was) Honda Civic Hybrid goes 100,000 miles with no problems

    if the company that comes into mind with me is the one you are referring to it´s the on that stored a123 cells in the space of the spare tire and also had another kit to fast-recharge this and the onboard supercaps in little time only ? this worked cause the controller of the company simply...
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    Electric Scoot Coupe ?

    this looks like a wider-wheelbase 2-seat version of a "twike" with a more agressive front steering setup ?
  20. D

    Powering Micro Sub

    in a submarine any batterie failure in operation ( using one of the more energy-dense and instable materials and composites) can lead to sparks, fire, smoke and high heat not suitable for a glass-fibre unibody hull or when being submerged in one. so a good bms for every cell in the pack and...
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    EV watercraft

    this hydrofoil concept needs aminimum speed to lift the boat of the water, but it also helps with waves/ stability and the energy needed to keep it affload is relatively little. as allready stated in thread, this would be a built fromoff the scratch most probably, mayb eeven using 2 engines (...
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    (Was) Honda Civic Hybrid goes 100,000 miles with no problems

    interresting, do you know the manufacturer of the packs ? if keeping nimh on there, "saft" has several interrestic nimh traction batteries, these can be refilled with destilled water and where designed for vehicle application and usage (both fitting their military customers and for the...
  23. D

    Powering Micro Sub

    lifepo4 looks great at first sight an per cell, but on an application like his the complexity in balancing and potential failures seems hefty in the dimensions of a diy-project. since the sub will be to small to reasonable accomodate big batteries they may be the only remaining answer, back on...
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    Powering Micro Sub

    Hi Submariner, there was no intention from my side to play a smartass-role about your design, it was the way you jumped into the idea and underestimated the electrical part of it that made me question your concept on a more rudimental level than obviously suiting your experience on topic ( of...
  25. D

    Powering Micro Sub

    solar charged seismic sensors have a far lower charge and discharge current than your project, having 6 x 6 volts in series and many in parralel will require balancing both on charge and discharge, since this endevour will require many connect diodes you will have to have a active balancing...
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