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  1. steelmesh

    Power DC brushed motor with an AC supply

    Trying to find an inexpensive and simple way to power a DC motor and other 12v controls from a 120v AC power source. The project is refurbishing a robotic scarecrow for a display, it yaws using a brushed DC scooter motor. I am assuming the motor may spike 150 watts at 12 volts. My idea is to...
  2. steelmesh

    Both hall throttles, 2 volts at 0% throttle

    Not sure how to word it in google to search for it. I just started having problems, my e-trike wouldn't run, assumed the controller faulting because high throttle on start up because the old razor hall thumb throttle was putting out 2 volts at 0% throttle, so I could disconnect the signal wire...
  3. steelmesh

    Surface mount vs Through-hole IC shock resistance

    Just wondering about the shock and fatigue of hard mounted electrical boards experienced on a high speed bike, the bone rattling harmonics. For heavier electrical components (opposed to 0603/0805 passives), would using through-hole have an advantage regarding durability. Can the copper pull off...
  4. steelmesh

    Versus Weapon X - disassembly pictures

    I figured I would be the first person in all of the internet to show the Weapon X disassembly to the frame. PHOTO ALBUM: http://imgur.com/a/gUxGc#0 I am starting to look at going with a custom extended rear swing arm mated with a motorcycle wheel. I am thinking about a name for the project...
  5. steelmesh

    Weapon X to the moon middrive?

    Who's with me? Edit, another pic:
  6. steelmesh

    Supplier 80-100 80100 motors - who in stock?

    I need this motor in hand for my third ebike design. Is bulk purchase on Alibaba the only source? It seems like there aren't any of these motors in the states, I don't check everyday, maybe once a month. What do you think?
  7. steelmesh

    E-trike fabbed in 6 days

    I started the build last Saturday July 20 using a Worksman tricycle and just took it for a test drive tonight before midnight. I was building it for work (in an 2m sqft factory) and in addition there is Maker Faire Detroit this weekend that I will be exhibiting this at. This was last...
  8. steelmesh

    Testing some incoming lipos

    I am checking performance of some new lipos I got in, this batch is all starting with the same voltage. I checked them multiple times with two cell checkers! 12800mah 2S2P nano-tech They were meant to be soldered together forever: Cell 1: 3.793v, Cell 2: 3.790v 3 discharge curves (35 amp...
  9. steelmesh

    Arduino throttle code: amp limiting and cruise control

    This is the working prototype code, for off-road use only ;) Sensitivity = 40mV/A for the 50amp current transducer (hall), 20mV/A for 100amp is also available ACS756 http://www.allegromicro.com/en/Products/Part_Numbers/0756/0756.pdf // Alpha Motor Control program written by Steelmesh 2012 //...
  10. steelmesh

    Turnigy nano-tech 8 gauge awg wire upgrade soldering tabs

    Since the tabs are already bonded to the existing solder blob, will I have any problems pulling off that 12 awg wire and replacing it with an 8 awg wire using some 40/60 solder (tinned with solder pot)? http://i.imgur.com/xTHViHd.jpg
  11. steelmesh

    Automatic fire suppressing recharge tub

    I found a metal tub at the local home depot and going to fabricate this for my first RC battery tests... In no way is this an excuse to charge batteries unattended and indoors (in my detached garage), but sometimes nature calls or I am wrenching on something else, so it will inevitably be left a...
  12. steelmesh

    X1e ebike overview - arduino, autoshift, cruise, etc.

    This is a low-budget experimental bicycle to play around with different technologies and learn. It helped me raise some money for my upcoming full-size hybrid vehicle system. Overview: http://youtu.be/K2vC3kzQfcQ Automatic Shifter: http://youtu.be/3pz1GatDktY
  13. steelmesh

    92v RC pack build - is this the right track

    I'm starting to plan my energy unit. I am looking at the 5S 5Ah nanotech RC packs, for their extreme charge rates needed for my application (regen). For discharge, I would say that I start around 350 amp bursts; then with goals set high, upwards of 600 amps bursts depending on mods I can make...
  14. steelmesh

    Negative Front Shock Pressure

    Anybody ever play around with this? I was testing different front air pressures on my DJ3s. I did a little maneuver with compressing the front shocks and with my other hand I held open the schrader to release pressure then close it at the bottom of the stroke. I didn't notice any difference...
  15. steelmesh

    Finding used bike mtb race parts websites

    Still hunting for parts deals and want to learn how to unload some parts myself at some point. I found ebay isn't very popular and expensive (right now) and on pinkbike.com, no one is replying to me, they just remove the postings...that is pretty rude IMO. There are only so many parts on ES too...
  16. steelmesh

    Marzocchi 888 or Monster T for ebikes

    I'm looking for some dual crowns to install in my 1-1/8 weapon x. It appears the 888s and Monster Ts are DH capable and affordable (pinkbike, ebay completed). I googled the difference between them, not really sure just different travel. I've looked at boxxers and fox, but they hold their...
  17. steelmesh

    CREE XML 1200 voltage - conflicting 4.2v or 8.4v? And wiring

    Question 1 of 2 Says output is 4.2v with 8800mah batt: http://www.amazon.com/gp/product/B008KXDO8Y/ref=ox_sc_act_title_1?ie=UTF8&smid=A3U3JJYGD7YYL1 Says output is 8.4v with 4400mah batt: http://www.amazon.com/Bicycle-HeadLight-HeadLamp-1200LM-Consumption/dp/B007ZN4RP4/ref=pd_sim_sbs_sg_6 Are...
  18. steelmesh

    Hub Motor durability on high performance mtb dh fs

    I have negative assumptions about hub motors on high performance mtb bikes; wanted to get some of your opinions on high stress applications using existing hub motor manufacturing technology (off-the-shelf motor kits). Looking for insight to add to my brain inventory when I'm dreaming up my next...
  19. steelmesh

    Battery box materials - safety focus

    Lithium battery fire will burn at twice the melting temperature of aluminum (plz correct me haha). However, aluminum is an amazing heat sink too. Would something like a construction of stainless steel laminated (thin) to aluminum work well...or could the aluminum (like thicker 3/16") survive a...
  20. steelmesh

    Is this a good starter DH for high speed ebike? Weapon x

    Is $800 a good deal? In "good" condition...ready to ride versus weapon x downhill frame marzocchi dirt jumper 3 forks hope front hydraulic disc brakes raceface crank 7 speeds
  21. steelmesh

    How to find the right fork for this Walmart special

    I am planning the upgrade to an RC motor for my e-bike, however cruising 25+mph on a Walmart Genesis V2100 does not give me warm fuzzy feelings, even though I am a cheap ass risk taker. I was thinking that I should get some downhill forks, motocross style long tubes. Will something like this (as...
  22. steelmesh

    Servo controlled rear gear derailleur shift

    Of any configuration on a pedal bike, i'm talking paving the cow path moving/guiding the chain just like the derailleur automatically...Anyone remember seeing/hearing/reading about one of these? I'm thinking scratch built and using MCU controlled big RC servo programmed to shift-points or pot...
  23. steelmesh

    Welding a genesis V2100 walmart bike frame

    If I tig welded some stuff on the downtube of this frame and rear-lower suspension with some 4043 filler, any comments about what I am planning to do? Like, is that some fake alum alloy or something...
  24. steelmesh

    First build non-hub - quick prototype 750w X1e

    This is my first ebike build, only experience is youtube. 2x12v agm 9Ah, she goes 4.5 - 8 miles depending on speed and stops, flat land testing. Top speed 21 mph on level ground (no gears yet, welded freewheel). New features just added: cruise, resume, brake cutoff, and amp feedback (using...
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