Recent content by UBMag

(yes. The neg. and pos. inside the cell has switched polarity making the voltage of the cell reversed.) Well. Because I think all vendors should have a chance of cleaning up their mess before hanging them out as "bad" publicly. And before that what I am wondering is, and would appreciate...

A man ordered and payed for a 48V 20Ah Li-ion battery pack form chineese vendor using paypal. After a long wait the battery arrived and the man stored the battery for a little while, since other parts for his build had not arrived. Then when the build started he found that the battery only gave...

Lucky kid!!! (You have probably allready thought it yourself: but at some point in time, that kid is going to take initiative to impress dad, by connecting up his own battery.... I hope you have given him the safety-lesson... ;) anyway. Awsome dad!!

Yes, I found that out to. Why I went for the trimpot instead of fixed resistors. (Just added a 10k ohm r between the pot and ground, to be sure not to fry the controller output by turning the pot to the max). Since I do not know the exact resistance of the gauge during operation, I am doing a...

Solved. (10k resistor + pot) = adjustable voltage divider...

Ok. I think I got the answer for the tiny voltage divider circuit i need... Im learning by doing here, so PLEASE correct me if I am wrong (so I do not fry anything testing it) :shock: V(in): 44,4 volt (-from the CA-plug on the controller on 12S pack) V(out): 37 volt (-to the eZee Battery Gauge...

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* Second thought: Since The Battery Gauge is a "active" device in that it regulates the controller A-output based on the shunt reading threw the CA-plug: will this voltage modification interupt its behavior or communication with the controller too? I guess the communication-voltage is at 5v both...

Not A bad idea, but want to keep it as clean as possible, so want to find a way to configure the unit (if possible).

I just tried out Grin`s version of the eZee Battery Gauge with "CA-plug" controller interface. Its a good little product with its basic configurability (although simple), and I can so far recommend it (for its purpos). The bike is built for a non-tech-savy person, so wanted to keep it simple...

Thanks. It is a CroMo fork from Ruff Cycles in germany (with shortened legs on this one). The bike was thrown together out of my left-over parts-bin, so front motor is just a coinsident.

Sorry for bombing this thread. (to much time on my hand lately I guess).... Before: GT Zone BMX After:

This fits into my experiences to. Did just above 73 kph (about 45mph) on my last motor with a 20s at 40-some amps.. I do not know the winds on these particular ones, but I am guessing its one of the higher ones based on that number of loaded rpm. But as you say, 4000w+ generated more heat than...

Dual-side phase-wires is unfortuanently not an option since the Crogenic needs the other side (but a good idea I need to remember for later). Yeah, there is that thread that learned me to do the wire upgrade in the first place. I have been looking for that :) Thanks Used your how2-post, and a...

Thank you for your input. I have not decided on wheel size, but as you say, the smaller the better i guess. Wow, 1000w more mechanical power based solely on lowered winding resistance? That is a good number for any air-cooling system. What kind of motor was he using? (just asking to get a feel...