Recent content by badboy1999

My Satiator on 1.026 firmware sometimes has the ''power fault error" message, I was thinking of upgrading it to the newest firmware, but Grin says 1.032 is not kosher: from: https://ebikes.ca/product-info/grin-products/cycle-satiator.html But in the firmware upgrading app, 1.035 is the...

Ah, those look pretty nice! I like that they can be run sensorless as well, my Kelly controller only works sensored and is really finicky about the connections to the hall-sensors so this definitely looks better. I'll try to document something here. First step after we get it working is to...

To star off, this is a Biro: A friend of mine acquired one of these with a broken controller for very cheap. Now the plan is to repair it. It has two engines, in the rear wheels, and a removable 48V battery. Peak power is supposed to be 4000w. I'm thinking of two Kelly controllers for 48v and...

It's a round connector combined with the phases. The small pins look like this, I named them like the numbers on the right: . . 56 . 4 . . . 123 I opened the motor, scraped off some insulation, and then it was easy to find out that 2 and 5 were indeed the power wires. When 5v is on...

No, because the hall sensors are supposed to get 5v to power on, so before that continuity testing is a bit moot.

Thanks for the suggestions! I tried the continuity testing, with a LED, but with power on 2&5 (and the power in reverse) I couldn't get the LED to light up any which way. I guess I'll take it apart, but to do it like this seemed more elegant to me :)

I've got a secondhand wheel with Tranz-X motor (250w 24v it says) but I'm trying to figure out the hall sensor pinout. The motor looks exactly like this BTW from the inside: Which maybe isn't really relevant since I'm just trying to figure out the Hall pinout which my Kelly controller needs. I...

Or it's a tl431 precision voltage reference, and resistors are used to set the voltage, so you can replace 10 SMD resistors to set a new voltage :) My chips have 5183u and D01ED printed on them so I guess your bms is just a bit different. Can't find 431 printed anywhere. :(

Update, hooked it up to my lab power supply and shot a video. How the bms works My hypothesis is that every cell has a circuit for both OVP and UVP, and those go to a optocoupler, and all 10 OVP-charge-optocouplers need to be the same state for the charging to happen (when there's no cell at...

Hah, I'd be perfectly fine with a PID battery current mode throttle, I'm only a biologist not a rocket scientist :) I'm new to this PID thing. Took me a while to get it (especially the differentation term of the equation), I couldn't get the PID library working correctly, I'll try again next...

Thanks for the extremely helpful reply! The Grin Phaserunner seems to be $300, which is a bit expensive for what I want, which is just 1 additional feature. The cycle analyst looks very interesting, but it's $130 with $40 shipping so that's also a bit much. The lebowski look really cool, but...

Because the biking computer in my bike store pedelec failed, I'm now running my bike with a $15 ebay 36v controller. It works allright, but the throttle is not throttle like in a car (where you adjust the amount of air going to the engine) but sets a target speed, so for a nice tailwind-like...

I'm referring to the kind of bms that's used in this tutorial: http://www.ebikeschool.com/how-to-build-a-diy-electric-bicycle-lithium-battery-from-18650-cells/ Mine just arrived but it is seemingly DOA, the seller is shipping me a new one but I want one now :( I'm guessing there's some kind of...