Recent content by john61ct

https://www.reddit.com/r/nextfuckinglevel/comments/10tsw8m/woman_sets_up_thief_who_took_her_bicycle_and_gets

Many places the local police do not know or care unless you stick out

Thermo Nucular controller 24F NUC24F Before shipping USD $600 Will sell for $200 over and above fully loaded costs, including shipping, US Customs tariff/excise if any, etc etc 6F and 12F not available, nor BMS On-board computer NUCDISP — $ 110 Sur-Ron connectors NUCSURW — $ 50 Choose your...

If you are safe and responsible / respectful even considerate, then the laws as written are irrelevant in most jurisdictions, up to whether or not the local plod actually enforce anything. If you are a dangerous eBike terrorist, I hope they throw the book at you, confiscate the bike, get you...

No, to work in series means all the current must go through each unit. The BMS must be specifically designed to be wired in series. Stop focusing on cheap and small, hard enough to get safety and reliability Cheap BMS easily fail even when used as designed, if you do use that "load current...

If anyone learns which specific model cells please post

Please keep us posted on how you go. The hardware IMO is worth what a real expert could charge for a half hour

Current rating is 30+ amps. Better vibration handling than most older styles. Not that splash resistant though

You need DC-DC conversion trying to do 12V. Adds to both cost and complexity, reduces reliability increases fire risk. Best to go to 7S 24V is common. But really LFP is the way to go. Would you heat your mobile living space with kerosene just because you had a lot sitting around?

A small cheap lead battery hardwired to the alternator side will act as a buffer for the load dump. No need to test its SoH, just replace it every few years

The more specific a question is, and the more accurately and precisely it is worded, the better the answers can be. Example scenarios with actual numbers can help. Optimizing for longevity the V&A numbers are standard for all LFP. A123 makes an excellent product, definitely will resist abuse...

Your post begs the question "Is Watts a useful specification / data point for a motor's capabilities? " The answer is of course a bit involved, but mostly falls toward negative. For a given use case and terrain conditions, the speed and torque actually delivered at each RPM point WITHOUT...

For good longevity a 0.4C charge rate. In hot temps up to 1C should be OK. In cooler ambients go slower or cell lifespan will be shortened. Without strong current limiting in the circuit, sources designed for lead batteries can be burnt out pretty quickly. Relying on thin conductors to limit...

Wow wish they would set up stateside. If you get a crap shipment here you are supposed to ship back to China, which costs so much more than the replacement products would be worth...

So many cumulative wasted minutes we'll never get back. Yes I know the Ignore function is the solution, will do that, but kept hoping some useful scraps would come along.