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  1. J

    48 - 265V 500 Lumen $1 eBike light from hardware store parts

    I tested about a dozen different LED bulbs, 5 brands from 3 hardware stores, to see over what voltage range they would function. LED bulbs have a built in PWM step-down voltage to current converter that is set to different voltages for different bulbs. Many of these voltage converters are...
  2. J

    Help suggest low cogging outrunner for Univ robotics project

    We have a haptic robotics project at school. It involves designing and making a force reflective robot wrist. The application is in tele-robotics, where a human moves one motorized arm, and those motions are replicated by an identical robot arm at a remote site. Here is an example picture and...
  3. J

    Edit: solved! HK screwing me on Nanotech order. What do?

    Edit: After nearly a month of wrangling and customer support emails it's now finally solved. They will ship similar batteries with a different part number at no extra cost. See last post. Hobbyking customer service is giving me a runaround with an order of 45-90C Nanotech LiPo. I ordered...
  4. J

    Discharging all cells to lvc with LiPo charger?

    I've been looking to get something like an iCharger to capacity test cells though charge/discharge cycles. I was wondering if a charger like the iCharger 106b actually discharges all 6 cells to lvc, or simply cuts when the first cell hits lvc? (So I get the full discharge curve for the weakest...
  5. J

    The Economist on measures for safe cycling.

    There's always been a debate if bikes belong on the road with the traffic or not. Some prominent cyclist such as Forrester in his "Effective cycling" book argued that bikes are vehicles and with proper cycling the road is the best place. However, as The Economist argues below actual statistics...
  6. J

    Streetlife on bikes in Toronto (movie review:Monkey Warfare)

    Dan and Linda are ex leftist revolutionaries in their 40's. They now live a quiet life biking around Toronto, collecting gems from garage sales and dumpsterdiving to resell on the Internet, fixing bikes in their basement to sell upmarket to rich people who pay dearly for retro when the chrome is...
  7. J

    Perspective: A free, user on-line community v.s. commercial

    The fate of ES is still in turmoil. A person unknown to the ES community bought the ES from longtime list maintainer Knightmb. Trevor intended to monetize the site, but members rebelled. Trevor realized he got in way over his head and everything points toward that the ES members and mods will...
  8. J

    Who killed american solar?

    We saw "Who killed the electrical car". This month Canadian business ran an article "Who killed American solar? " Turns out solar hot water heating was "hot" business in the American south from around 1900 to 1950 with manufacturers in CA and FL. In 1891 a single home solar water heating unit...
  9. J

    Caste HV160 DOA? Or did I do something wrong?

    Finally got my Castle ICE 160A HV today, so was all excited about getting home and trying it. The thing surely is small. Can only appreciate how small once in your hand: Together with my Astro 8150 I was also planning for a lightweight powerful package at 1.6kg: So I hooked the ESC to the...
  10. J

    Cannondale Jekyll Full Suspension with BMC build and review

    I built up a Cannondale Jekyll with a BMC V2S some months ago. Here is a build log and riding impressions. Some background. I have been riding a Specialized Stumpjumper with a 9C@72V past year and a half. While the Stumpjumper has admirable handling and feel in its original state, adding the...
  11. J

    2.2MWh LiMn battery to be built in Vancouver

    http://www.economist.com/node/17352944
  12. J

    Help add Cycleanalyst connector to Crystalyte 35A controller

    I have a Crystalyte 35A analog 36-72V controller that I would like to add the direct-plugin Cycleanalyst connector to. eBikesSF sells the controllers with this connector already installed, but my controller doesn't have it. I was hoping someone could post a photo or description of where to...
  13. J

    Cyclone full suspension trike

    Just saw the first picture of Cyclone's full suspension trike today: Goes up to 90km/h according to their web site. Full size rear wheel, but looks like 16" fronts. What were they thinking? I can't see how the front suspension works in this picture. Hope they post more pictures of this trike...
  14. J

    No luck soldering aluminum cell tabs. What am I doing wrong?

    I finally putting together a pack from my cellman A123 pouch cells purchased earlier this spring: Before risking the real cells I decided to practice soldering on some other aluminum pieces. Tried both thin alu sheets and household aluminum foil. I sanded and applied "solder it" aluminum and...
  15. J

    Congrats to Amberwolf for winning EBike design contest

    Congrats to Amberwolf for winning ebikes.ca The Great Cycle Analyst giveaway contest Well deserved! From http://www.ebike.ca
  16. J

    ES browsing on smartphones and other mobile devices.

    I'm getting much of my daily ES dose browsing on a Nokia N800, during breaks. The Nokia is running an Opera web browser. (I tried mozilla also, but it is too slow on the Nokia) I tried the different modes including simple in the user settings. However, the 333MHz ARM processor on the Linux...
  17. J

    More efficient devices does not lessen energy consumption.

    We have all heard "build it and they will come" about how building new roads to ease traffic congestion instead just increases traffic until the same level of congestion is reached. The same may be true for other areas as well. The economist recently published an article that predicts that the...
  18. J

    Ebikes in Japan? Nope!

    I got a chance to go Sapporo, Japan for a conference. I arrived here three days ago exited to find out what nifty ebikes the Japanese might have come up with. While in three days I have seen plenty of bikes, unfortunately o nly one was an ebike; a rather generic looking Panasonic brand. Not...
  19. J

    Upgrade to big disk, better on front or rear?

    My Cannondale Jekyll has 6" discs front and rear. With a geared hub (no regen braking) and sometimes pulling a trailer, I was wondering if it's a good idea to upgrade brakes? I have an 8" disc I could fit to either front or rear. At first I thought that naturally the front should have the...
  20. J

    Reviews of European market eBikes

    I was curious what brands of quality ebikes one can buy. Found this ranking of eBikes on the European market. Short blurbs about each bike is on the web site. To get to the full reviews it looks like one has to subscribe to the magazine. However the list of models is useful to start off some...
  21. J

    Batteries and Fuel Cells Simulation web seminar Aug 18

    FYI:
  22. J

    Charging and using cheap consumer LiION batts

    Every so often I see a deal where LiION batteries for some obsolete device are sold for pennies. These batteries are usually low current. Last week I bought Sony PSP batteries for 49c/piece. Inside is an oval 1800mAh LiCo cell of some kind. This was from NCIX in BC. Looks like the deal is not...
  23. J

    "People for bikes" advocacy: sign for better policies

    ebikekit.com had this posted in their newsletter. I didn't see it at ES. They have 40,000 names for improving biking access and safety. ES members could make that 44,000+!! http://www.peopleforbikes.org/page/s/pledge Here is their blurb:
  24. J

    Electronics and microcontroller starting kit recommendations

    I'm looking for a starter kit for someone to learn to assemble and program basic microcontroller kits. I'm hoping to find something that is easy enough to start and stimulating to continue so the gift doesn't become another dust collector. (my other gifts of multimeters, batteries, charges...
  25. J

    The badnews graph: Other way looking at LFP's reality check

    In the **Important** reality check on motor, voltage, current etc. thread LFP/Luke, Rhite05/Eric and others are doing an excellent EE-based description of the power conversion in a switched regulator. http://endless-sphere.com/forums/viewtopic.php?f=2&t=19590&start=0 A bit of a different and...
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