Endless Sphere

I'm messing with a CA3 and an RC ESC that also requires BEC power. Using the above diagram as a guide I connected the yellow CA3 wire to the 5v pot pad on the CA3 board. Im using an external grin shunt with the pass through throttle ground and yellow wire. A strange observation is that the CA3 scree...

This website will generate a sprocket .dxf file or cnc code for you using your input of roller diameter and pitch.

I have not tested a sprocket generated from it in the real world but it looks like a nice free tool.

http://www.idleamusements.com/?page_id=367

Typically someone would ask for guidance related to specifics in the original poster's thread. So if you want to solve a problem in a similar way as another person its normal to post pics of your own stuff on their thread. That is encouraged and can be helpful. However, once you actually start build...

I would like to add that in all my years of being on this forum I have never heard of a single person being happy with a revolt motor. I have no experience with them personally. Like many people on this forum I was very optimistic about them at first. They seemed like they would bridge the gap betwe...

Looks like you got it working. From what I have seen so far you can give the throttle or in your case arduino an independent 5v power source as long as the grounds are shared between the throttle and controller. The way I understand it is that the controller only cares about the voltage between the ...

I've been hoping a bike like this would come to market. I find myself questioning what I would consider a reasonable price. Assuming its in the 20kw range and has 3-5kwh of battery on it would you guys pay the same price as the zero fx? I think the light be was a great value because I know the fun t...

That does suck but at least you'll know its done well. My 80100 outrunner had strands of wire that were loose and just hanging out if the bunch. Some were long enough to scrape on the magnets or get wedged in the air gap. Quality control isnt exactly what these motors are known for.

You can get them here.
http://sickbikeparts.com/cranks-freewhe ... crank-set/

Or here
https://www.webcyclery.com/product/jits ... s-4710.htm

Or here
http://lightning-rods10.mybigcommerce.c ... k-arm-set/

Good luck with your build.

What kind of cells?

I'm looking for some info on the USB linker and programming for Alien Power Systems or Flier Model ESCs. I picked up a cheap used 22s 120amp Fliermodel Ebike ESC but it doesn't come with the USB cable. I'm hoping someone can tell me what other ESCs on the market might use the same cable. There is no...

I would like to find a USB programming cable for a FLIER MODEL brand ESC. I'm getting an open box FlierModel ESC with no accessories or instructions. From some quick google searching it looks like the USB to ESC programming cables are pretty similar across many ESC brands. I also think these are the...

There was an old commercial on tv about a prius having more lines of computer code than a fighter jet. Balancing ice vs electric power for max efficiency would likely require a computer. I think you would need full continuous control for rpm and torque of both the gas and electric motor so the perce...

What is the rpm/volt for this motor. The spec sheets from most of the vendors just list the max rpm at 5000 but it would be nice to know the kv specifically. Thanks.

Sorry to hear about the suspension. I'm always amazed they hold up as long as they do. Everything on bikes seems impossibly thin. Looks like you have the skills to repair or remake the suspension parts if you have to. You could probably bore and sleeve some of those parts and they'd be stronger than...

Might be a little challenging to tune the output of the torque sensor to match the non-linear tension on the chain. As long as you can map the signal coming from the sensor it should work. I would think you could use a strain gauge in an aluminum bracket holding the chain idler to minimize moving pa...

Neat! Looks expensive. If its just a method of field weakening, would there be some advantage to doing it mechanically vs controller? Could this mechanical method be used in addition to controller timing or do both methods reach some practical limit of diminishing returns?

I thought the same thing about throttle position sensors being hall sensors until someone corrected me on a forum. Apparently they are mostly pots and reliable for millions of cycles. They also aren't as vulnerable to EMF. I would look at an automotive TPS for cost and waterproofing. I'd grab one fr...

Im not up on my VESC trivia. Can these be updated to the latest firmware such that it would be functionally equivalent to a VESC 4?

I agree that chain retention is easier with non shifting standard teeth and singlespeed chain. The issue I keep bringing up about tensioners and chain management is based on the design of full suspension mountain bikes. Many common frames are not single pivot. On the above mentioned supermoto applic...

Using the rear brake extends your stopping distance. The hardest you can stop is with the rear wheel just above the ground. Not challenging that statement but am genuinely curious about your source material. Do have any links or articles explaining it? Seems totally reasonable that the max braking ...

Nobody said you couldn't lock up wheels up with regen. In a nutshell, the same way ICE unconsciously encourages you to speed away from a green light. Regen, encourages you to prepare, slow down, and engage a corner half a mile away. You have NO clue. With ASI controller and left hand domino regen t...

I have not ridden a bike with variable regen but I have serious doubts about riding without a mechanical lever actuated rear brake for a variety of reasons: I like the modulation of regular brakes and the ability to lock up the wheel for trials type riding. If high end variable regen matches modulat...

Nice plan and work so far. Controllers for these large RC motors have proven challenging for bike use so far which is why you don't see a whole lot of them run to full potential. Looks like a nice compact mounting solution. Have you given any thought to using the swing-arm pivot as the jackshaft loc...

Is there a standard thread-on bike Freewheel in there? If so, is the innermost circle of 8 bolts smaller than the minor diameter of the Freewheel threads so they can pass through to the hub? Its hard to see what is going on there? Are you keeping it secret?

I love the "Heavy" sticker as if a pallet of anything that size would be tempting for a person to lift by themselves.