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    Low-cost Snowmobile Electric Conversion

    I’ve been gone too long… Second on the SPIM08 batteries. They dump power.
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    Portable snow tank for towing skiers

    I am. I’ve designed and been 3D printing TPU gaskets to go all around the exterior where the body panels will attach. I’m also going to be isolating the battery compartment from everything else. If this is a space you have experience in, pointers are always welcome! Sent from my iPhone using...
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    Portable snow tank for towing skiers

    Family vacation to Myrtle Beach last week but I’m back at it. I spent time dialing in the software for the joystick to controller interface and I’m really happy with it. It steers both motors just fine now. I’ll tweak it more to my liking later but I can say that it works. I ordered a horn...
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    Portable snow tank for towing skiers

    I put everything together to test fit. I have a little more room than I expected, so that’s probably good. I mounted the motors and am going to leave them while I debug the joystick software so the motors don’t jump away from me. Finding drive sprocket and hub combos is proving to be a...
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    Votol EM-100 & EM-150 controllers

    Is this link what you’re looking for? Ive had a to-do since may to bug an arduino compatible reader for the EM-150, still something I plan to do once I get some other parts of the project so be. Sent from my iPhone using Tapatalk
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    dual 3k motors

    What kind of motor is it? And which controller? Sent from my iPhone using Tapatalk
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    dual 3k motors

    It sounds like you have an answer you want already and are looking at how to implement it. By the time you’re done building this, I would expect the cost to be higher than selling off what you have and buying a 6kw rear wheel setup. Keep in mind motors are also generators, so if you put a...
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    Portable snow tank for towing skiers

    Far and away the biggest lesson learned that I’m going to take into my next project is this: whenever I design and build my own frame and body panels, I’m going to etch the outlines of where everything goes into all the body panels when I laser cut them. I measured and measured and measured...
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    Portable snow tank for towing skiers

    A few more action shots. Drilling out motor mounts before I welded the frame back together Sent from my iPhone using Tapatalk
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    Portable snow tank for towing skiers

    Today I welded the frame back together after installing the motor mounts. I designed the outer panels and started plasma cutting those. Sent from my iPhone using Tapatalk
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    Portable snow tank for towing skiers

    Hahaha! We have four birthdays in the last two weeks of June, so it’s been a lot of time wasted on that :) I took a half day Monday for some grinding and welding. I made a mistake and needed to correct, then started tapping the frame for the motor mounts. I’m taking the day off tomorrow to...
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    Portable snow tank for towing skiers

    Schools out so we had trips and a family sick spell, so not much to update until today. I spent a few hours grinding all the welds down. Nice and smooth now, so I can start putting panels in and attach the motor mounts Sent from my iPhone using Tapatalk
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    Portable snow tank for towing skiers

    I took the day off today and am working on this beast. I got the motor mount holes corrected (too narrow) and mounted and am using it to place the frame rails that it will mount to. About to start a lot of welding. Wish me luck. Sent from my iPhone using Tapatalk
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    Portable snow tank for towing skiers

    I do want it to be able to pull you up a mountain if you want to test uphill skiing. All joking aside, I’m aiming for something with a lot of juice behind it! Sent from my iPhone using Tapatalk
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    Portable snow tank for towing skiers

    Cut and tack welded the frame today. Next up is to complete the welds and mount the motors. I’m still fiddling with how I want the motor mounts to work. Once everything is in and secure then I’ll dial the software in on the controller. It’s looking more and more like a 90’s era battlebot, but...
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    Votol EM-100 & EM-150 controllers

    I violated a documentation rule and referred to something without giving the source (namely the video of my joystick controller with the deadman). I got a DM asking for it, so for reference here is the link: https://youtube.com/shorts/qIejY1E9TUk?feature=share Sent from my iPhone using Tapatalk
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    DIY beach hot tub

    I lived in Newport Beach in the early 2000’s. I can’t even imagine a waste pipe there then or now. Heck of a place to live. Sent from my iPhone using Tapatalk
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    DIY beach hot tub

    A+ Sent from my iPhone using Tapatalk
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    Votol EM-100 & EM-150 controllers

    Has anyone ever found documentation or had success coding their own interface to a votol controller? I’d like to get readings from my EM-150’s on something smaller than a laptop. I’m able to with the Daly BMS and want to build some safety features and logging in to my build. I don’t care if it’s...
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    Votol EM-100 & EM-150 controllers

    I have a deadman switch in the one I’m building. It uses ESP32. If you look at that video closely I shared the other day you can see me holding the wii remote button with my index finger - that’s the deadman. You could build one with some ESP’s and a relay on the e lock. There are probably...
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    How to Learn About Battery Management Systems

    I thought I’d share. There’s a Coursera 5-course series in learning how to build BMS’s https://www.coursera.org/learn/battery-management-systems I don’t necessarily want to learn how to build my own, but I have been listening to the lectures from the first class during my commute just so I can...
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    Portable snow tank for towing skiers

    Thanks for the advice. I finally got some time to connect to the controller software tonight. I read the manual first so that helped some… but yeah, not straightforward. The big one of tonight was getting the whole custom controller assembly to work. The voltages are in the wrong range and the...
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    Portable snow tank for towing skiers

    The work continues. I have contractors and pre-charge for each battery. In hindsight I’m wishing I’d ordered a 400+ amp bms so I could just have one big battery instead of two - at this point I have Almost entirely separate drivetrains for left and right wheel. The joystick is working - it...
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    Portable snow tank for towing skiers

    Hey now there’s a good idea! My daughter wants me to put a little seat with a stuffed animal on top. I got the thumb stick transmitting signals and got the receiver to put out the (mostly) correct speed settings, but I still need to finish getting those converted to voltages, so this joystick...
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    Portable snow tank for towing skiers

    I cut the compression plates for the SPIM08 batteries today, and also cut the motor mounts for the qs138s. I need to file the edges and install, but fit is perfect. Sent from my iPhone using Tapatalk
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