Recent content by fredo gauvino

Hello All, The controller I repaired (9 FET Lyen Edition) is working very well with new MOSFET at 48V, but not so great on 36V. ( 12S x 1P A123 LiFePO4 ) The LVC seems to be kicking in too soon. :warn: for context, I am building an e-Bike for my 12 YO kid, and did not want him to go too fast...

I received the MOSFETs, replaced only one that seemed to be shorted, and the controller works again like a new... Thanks all ! The end. :D

I unsoldered the faulty mosfet #3. I retried the controller and it seems to work properly, except for some vibrations. there is probably a fail safe check that prevents the controller from working if a mosfet is shorted... It seems that I was lucky not to blow up other things! Capacitor looks...

Good idea, I did just that !

Here is the connector after removal. I forgot that those types of connectors mixes red and black when connected.

Hello All, I have a confession to make. Recently I made a very very dumb mistake, and connected my newly built 12S A123 battery to my controller reversing the polarity. :shock: It made a huge spark, and some wires got incandescent, melted down and I burnt myself while attempting to unconnect...

Hmmm...Even with statoraid in it ? :cry: The wire gage is very thick! :P With the remaining two wires I have added a 10k thermistor, but I have not figured yet how I am going to be monitoring the temperature. My current Lyen controller does not have a temperature input. Maybe something like...

Hello all ! I finally had some time this weekend to retry a third time. I was able to completely remove the old epoxy, freeing the hall sensors and re-glued them more precisely. I also rewired the internal phases, and I discovered that I had finally some rubbing occuring... I overestimated the...

Hello, thanks for the answer! Yes, sorry, my LEDs were on the HALL sensors and not the phases, my mistake. Doh. I think that you are right the Thump or Bang that I hear is exactly that, the controller reversing direction momentarely. You hear it in the video, @ 38~40s, but it is a...

Hello All, lately I was given a old Bionx PL-350 with a dead battery. A new project ! I decided to open it and replace the controller with an external one ( Lyen Edition 9 FET :twisted: :flame: ) Using ebikes.ca youtube instructions, everything went very nicely. :D Once closed I quickly...

Hello all, This winter I built a Magie Pie hybrid bike for my girlfriend. 8) It went well, but the 48V 15A battery is ridiculously too heavy (10 kg) and way too fast (44 kph) for my girlfriend. :roll: She does not feel safe, therefore she is not using it. :cry: So this spring, I started...

Thanks ! This sound a cheap replacement source for gears. :P However, I don't think that the gears are the source of the problem. :roll: It seems more like the clutch as I could still use the motor when the clutch was "engaged". It is only when the motor is not turning at the same speed...

Hello all, I have been using an AmpedBikes rear geared 26" motor daily for 5 years now... Yesterday, after giving some unhappy grinding "warnings", I hitted a pothole, and it started doing this noise : https://www.youtube.com/watch?v=ZTZftF7FKbU After the five stages of denial, anger...

Yes ! you may !!! ... :) ... Ok ! :lol: With SLA 12V x 3 = 36 Volts, it was about 31-33 km/h ( ~20 mph ) :? With SLA 12V x 4 = 48 Volts ( more like 52V ), it was about 43-44 km/h ( 27 mph ) :P With LiPos 12S = 44.4 Volts ( more like 49.8V ), it was about 41-42 km/h ( 26 mph ) 8) All those...

Wow ! AmpedBikes offered me a replacement motor. :) So I just sent back the motor for Danny to have a look... There is definitely a way to take it appart with the right tools... But to me, not beeing able to open it has very little influence in my buying decision... :wink: From the first to...