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  1. lazarus2405

    Yet Another LiPo Puncture

    While shaking down my new battery (10x 4s 5Ah 20C Turnigy hardcases, for 20s 10Ah), I found a cell with a hard time holding its voltage. I smelled the unmistakable scent of electrolyte, popped open the hardcase, and found the culprit. The lowest cell has a nice little gash in the side near the...
  2. lazarus2405

    Paralleling new packs and old

    Greetings folks, I've got a new battery built of 20C Turnigy LiPos, 20s10Ah. My old battery is a 21s 9ah pack of LiMn e-molis, which are now five years old. While their capacity has held up, they have an awfully high internal resistance, which is one reason I replaced them (the other being...
  3. lazarus2405

    Laz's v3 question, planning, and build thread

    Back in late 2007/early 2008, I had my first two rounds of ebike building, and I learned a lot. I bought a used 5" full suspension trail bike, laced a 5303 into a 20" wheel, and ran around with 84v of LiMn for about two years. Then, I discovered mountain biking and took the electronics off the...
  4. lazarus2405

    E-Moli IMR26700 cells sagging like belts went outta style!

    Howdy all, I just pulled my ebike kit out of storage to get them sorted for the coming season, and noticed that my battery is awfully weak. They're IMR26700 cells pulled from Milwaukee 28v packs in late 2007. 63 cells, arranged in 21s3p for a 84v9ah pack powering a 5303 through a 100a Kelly...
  5. lazarus2405

    Battery charging help requested! (E-moli LiMn)

    So, roughly three years ago I wrote up my build, a 5303, Kelly controller, and a 84v 9ah (21s3p) battery built from Milwaukee 28v power tool battery packs (These ones, they're 7s1p 3ah E-moli LiMn cells). I bypassed the BMS for discharging and used the BMS and the Milwaukee chargers for...
  6. lazarus2405

    v2 clyte controller at 112v - I hate troubleshooting

    So, I've begun my 112v testing, and I have had no success. The thing doesn't seem to "like" 112v. Though, I have had no fires, explosions, or destroyed components, so it can't be that bad. *shrug* The controller standbys just fine. Upon giving it throttle, the motor twitches and dies. The...
  7. lazarus2405

    6v in 12v out DC-DC converters?

    Well, this isn't very e-bike related, but I figured this'd be the best place I knew of to ask. I'm looking for a DC-DC step-up converter that'll output ~12v on a ~6v input. Does anyone have any recommendations? I have an acquaintance who is rewiring a vintage motorcycle and updating the...
  8. lazarus2405

    Pawn Shop Finds - thoughts?

    First off, I know next to nothing about downhill bikes. I don't know what brands, models, or components are good, bad, or somewhere in between. I do know, though, that when my Target S25 bites the dust, I'll want a real bike for my 50mph x5 fun. So, I was looking around at a couple LBS's and...
  9. lazarus2405

    Laz's version 2 build

    So, my first build came and went with nary a pic. So, for round two, I thought I'd do a little better. Should be a fun ride: A quick recap of the v1 build: I ordered a 5304 (which actually turned out to be a 5303) in a 26" rim, powered by 6 Milwaukee V28 packs for an 84v 6ah setup. The heart...
  10. lazarus2405

    Thermal sensor for a 12vdc fan?

    I'd like to rig a small fan inside my (future) controller and have it turn on at, oh, 40-50C or so. How would this most easily be accomplished? Some sort of thermal switch in series with the fan, I'd figure. Could anyone tell me the keywords of what I'm looking for, or better yet, a digikey...
  11. lazarus2405

    4110 controller options?

    Howdy, As some of you may know, I am in a bit of a pickle. My high-pewered setup is without a heart, since my controller blew a couple of weeks ago. The gentleman who modified iit, Bob Mcree, is backlogged with work, and ebikes.ca's stock of anything similar is six weeks out. I want to be able...
  12. lazarus2405

    Yet another 26" to 20" conversion.

    So, my controller is completely blown. I'm reconfiguring my batteries and doubling my pack capacity, getting torque arms made, and replacing the destroyed phase wires on my 5304. Or, what I thought was a 5304. After testing and rechecking my rpm/v data, and conversing with Justin at ebikes.ca...
  13. lazarus2405

    Torque arm for Schwinn S-series bikes

    Howdy folks! It seems that these Target Schwinns are getting pretty popular for electric conversions, especially for higher powered setups. With the need for a good torque arm setup never more salient to me, I decided to give it a go and try to make something not only I could use, but other...
  14. lazarus2405

    X5 motor repair: When good dropouts go bad!

    Title says it all. Sure I thought they were great. They were 8mm wide! But, aluminum. My axle slowly ate away until it came loose in the wee hours of the morning, on a pothole, on a sidewalk, at 10mph, 15 feet from the bike's home. So, I've proceeded to begin troubleshooting. At least one...
  15. lazarus2405

    X5 motor repair: When good dropouts go bad!

    Title says it all. Sure I thought they were great. They were 8mm wide! But, aluminum. My axle slowly ate away until it came loose in the wee hours of the morning, on a pothole, on a sidewalk, at 10mph, 15 feet from the bike's home. So, I've proceeded to begin troubleshooting. At least one...
  16. lazarus2405

    Wind observations

    So, this whole week in Oklahoma, we have steady winds out of the south of at least 20mph with gusts 5mph above that. This is fatal for my other electric-powered hobby, RC flying, but I figured it wouldn't matter much with a 5304 at 84v. Needless to say, I should have known better. So I...
  17. lazarus2405

    Relay wiring question!

    So, I'm using a relay so i can activate a high current connection with a small MOM NO switch (aka Little Red Button). So, how can I easily power the relay? I have a CA and Hall throttle on my handlebars. Can I use one of those, and if so how could I tap into one of them (which pins/wires)...
  18. lazarus2405

    Fine-tuning the first build - the non-electric stuff.

    Well, my first build is more or less done, and a build thread is coming shortly after Easter. I've got some electrical tinkering to do, but that's over in the technical forum. Now, I need help with some bike bits. So, please, read on. Basic setup I'm running a 84v 70a 4110 controller, 5304/26"...
  19. lazarus2405

    Pedaling an x5 - need an explanation.

    So a week ago, I was doing the first capacity tests of my batteries, and I ended up two miles from home at my (self-imposed) LVC and without a way to charge. So, I pedaled back home, using as little power as I could on hills and to fight the drag from that big huge 5304. Oddly, I found that...
  20. lazarus2405

    Hotrod up and running... now time to mod!

    So, I've finished my first build. It's a 26" faux-Schwinn S-25 full suspension MTB with a 5304 in rear, a modded controller from Bob Mcree (4110 FETs, ~70A limit - I need to measure it, might be lower - and busses reinforced with brass bars), powered by a 84V 6Ah E-Moli pack (21s2p, 15C, LiMn...
  21. lazarus2405

    The ebiker's bag: what we should have at all times

    So, I'm putting together a list of things every ebiker should have on their ride at all times. Please feel free to add to the list: Spare innertube Patch kit Tire levers CO2 tire inflator and cartridges Appropriate wrench to remove wheels Spare fuses Allen wrenches Phillips screwdriver...
  22. lazarus2405

    Repairing/troubleshooting a Milwaukee (E-Moli) BMS

    So I'm in the process of modifying my Milwaukee packs for ebike use. I'm simply soldering 10AWG to the battery tabs to bypass the BMS for discharging, leaving it intact for easy charging using the stock charger and BMS. Of my six packs, one isn't working. If I can't use the BMS to charge, then...
  23. lazarus2405

    Headlights?

    So I'm ordering my kit tomorrow morning (yeah, I really mean it this time!), and it struck me that I hadn't considered lighting. I'll be running on an 84v 9ah LiMn (e-moli) setup, but sticking to ~20mph at night in suburban traffic conditions. How many watts would be enough, and what would you...
  24. lazarus2405

    Laz's first build!

    Howdy folks! I took a break from ebike dreams back near the start of November, and now I'm ready to get down to building. I'm ordering everything in about a week from today, and I hope to be riding before the Super Tuesday primaries! The donor bike is a basic steel unsuspended off-road bike...
  25. lazarus2405

    Justin got controll!

    Justin at Ebikes.ca got his fall shipment, including the new Crystalyte controllers. Both the 72v40a and a new 72v50a controller come stock with IRFB4110 MOSFETS (nominal voltage 100v, resistance 4.5mOhms,). The only electrical difference is the max current, most likely by using a different...
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