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  1. MrDude_1

    inexpensive BRUSHED DC motor controller??

    hey fechter! Not long after this post, I sheared the motor shaft on this kart. Had it sitting these last couple years. I decided to bring it back with a nice beefy motor, but was thinking about how someone posted a current limiting circuit... I searched and found this. You mentioned you would...
  2. MrDude_1

    Using bicycle's frame as heatsink for the Phaserunner

    I just want to point out that even if you put it in a bucket of room temp water, and kept the water at that temp, you EVENTUALLY will burn up the phase runner if you keep pulling maximum phase current from it. The thermal path from the mosfet die to the mosfet package can only support so much...
  3. MrDude_1

    more powerful brushed controller

    heres a thread on the powerful $30 controller I used: https://www.endless-sphere.com/forums/viewtopic.php?t=83573 As long as you dont need current limiting or a voltage cutoff, it works well.
  4. MrDude_1

    more powerful brushed controller

    yeah, I ran one of those on a massive DC kart motor until it melted the wires... they're pretty robust considering how simple they are.
  5. MrDude_1

    Kepler Friction drive comes of age.

    I am both really happy you have your arduino throttle working.... and cringing at the block "programming" used. On the otherhand, its literally what I do for a living.
  6. MrDude_1

    Why are more of you DIYers not in the e-bike business?

    Im that guy. If I was at your shop, I would have bought your spokes for $30 to support you. I know I could buy the exact same spokes for $13 off the internet, but I did take some of your time. The larger problem is that most bicycle parts are cheap. Bicycles are incredibly simple and parts are...
  7. MrDude_1

    Hearing protection while riding

    uhh... ok. :lol:
  8. MrDude_1

    Hearing protection while riding

    well theres your problem. You bought a poser helmet with no real protection. Buy a real helmet, and the wind noise will be almost non-existant (and your face will stay pretty). For example, if you wanted to stick with Bell, Look at a Bell Star.
  9. MrDude_1

    Compact Field Oriented Controller, ASI + Grin, limited run

    All of them including this one can have profiles if you have a cycle analyst v3
  10. MrDude_1

    R Martin EVD Moped with HubMonster

    If you happen to find one in the southeastern US, could you send me a PM? My brother is a bit of a moped/scooter fan and hes showing an interest in electrics. Id love to get him out of his modded GY6 stuff and into EVs... and if he doesnt like it, I'll ride the thing. lol.
  11. MrDude_1

    Wheelies

    Correct. There are 2 basic types of wheelies. Balance point wheelies have the Center of Gravity of the bike balanced over the rear wheel. This takes almost zero power. If you want to accelerate, you need to dip the weight forward a bit first, and to brake you lean back further. These are the...
  12. MrDude_1

    R Martin EVD Moped with HubMonster

    Random thought... if you took one of those hub motors that bolted to the rim, and instead bolted a chainring on it... would it be a good choice for a gokart motor? I mean you could gear it up or down a bit to match the wheel size... although 1:1 is probably about right since you want good...
  13. MrDude_1

    Wheelies

    I learned on 50cc pitbike motards... started with them, then dirtbikes, then sportbikes. wheelies on ebikes that have amp or torque based throttles is easy. wheelies on ebikes that use speed throttles or laggy throttles is a bit harder.
  14. MrDude_1

    Mini Boat

    Thats pretty cool. I kinda want to make the boat equivalent of this: Something the size of yours with an enormous engine poking out of it. Sure an EV boat would be cool too, but it wouldnt have the same "joke" factor in it. :lol:
  15. MrDude_1

    Anyway of making the R martins from china sold on Ali express road legal in U.S.

    The act of importing them for road use is federal. The act of registering, titling and how you may drive them on the road is state. so its a mess.
  16. MrDude_1

    Assembling a safe fast ebike

    YES! I nearly forgot about them because I always have them. If you dont have good mirrors... get some. Just go on ebay, and if you dont like the bicycle mirrors, start looking at motorcycle bar end (or other kind) of mirrors. Want stalks? You can get CNC aluminum perches for a couple dollars...
  17. MrDude_1

    Anyway of making the R martins from china sold on Ali express road legal in U.S.

    Ignoring the fact there are countries other than the USA.... Just in the USA there are 50 states, and all of them individually have their own different laws for classifying and registering vehicles. so no matter what you say... theres probably a state where you're wrong. :lol:
  18. MrDude_1

    Torque / Speed Help - DIY 800W 36V Scooter build - 11F / 74R Sprockets - GoPed conversion

    All of them run the same brushed DC motor. You can get them in lead acid or lithium, but the difference is weight and range, not top speed or acceleration. If you get an upgraded motor, you can accelerate faster or gear it to go faster... but if you try to push much more power than stock through...
  19. MrDude_1

    Torque / Speed Help - DIY 800W 36V Scooter build - 11F / 74R Sprockets - GoPed conversion

    10-12mph is about right. Just like the "750w" goped ESR750.
  20. MrDude_1

    Challenge with brakes

    This is exactly what I was going to suggest. A simple rim brake mounted right there will work. Just make sure it has enough reach.
  21. MrDude_1

    Assembling a safe fast ebike

    I'm probably more "active" on the bike than most... when I am braking extremely hard, I put my weight back and down.. under max braking the seat is actually in-front of me, and im ducking over the rear wheel. lol. No worries of flip over, just max traction braking... I will say it is MUCH easier...
  22. MrDude_1

    Assembling a safe fast ebike

    so to answer the original questions... I am a very experienced sportbike rider. Unlike a lot of people on here, I feel completely comfortable moving in traffic, passing traffic and going "high speed". There are a few ebike things that I dont see talked about much. First are brakes of course...
  23. MrDude_1

    Using bicycle's frame as heatsink for the Phaserunner

    because the controller its based on is 6fet... not a custom design. And the sellers target market are practical low/mid power ebike designs, not high power. they're looking at making a smaller one, not larger. If you want smaller, get a VESC or a FOCbox. if you want larger, right now adaptto has...
  24. MrDude_1

    Watt means "intelligence"?

    Is this English? :lol:
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