Recent content by passpato

Thanks for the reply but I knew all of that except that most pas sensors clain they require a 3mm gap. I will try reducing he gap. I really want to know how the sensor works so that I can test it. Im guessing the possitive and negative wires go to a coil that provides a magnetic field. When the...

Can somebody help me please. I am repairing an ebike for a friend. Unfortunately its been messed about with before. Im pretty sure the issue is with the pas sensor or its curcuit inside the speed controller. The owner had already started fitting a new pas sensor and unfortunately I no longer...

Slightly off beat for an EV forum. I have a 36v ebike and usually use this forum to discuss that but this question is about my 12v 10 cell Black and Decker Nimh drill battery charger. I need a replacement charger and the original is a constant current saturation charger. My charger is marked...

I have a quality 36-volt brushed speed controller that I would like to repair. The Controller is a 4QD uni 8, and no longer supported by 4qd. I have found a burnt resistor on the circuit board which I will replace but I believe the problem started from the heatsink screws coming loose and the...

I just wanted to sing the praises of Li Ping. My ping 36v 10ah battery is 8 years old now. Its installed on a Heinzmann powered Specialized mountain bike. It doesn't get used that much these days but has seen many deep cycles over 20 miles where the bms has cut power. I connected a Turnigy...

Thanks Amberwolf. As always you put a lot of effort in to your replies. It is appreciated.

I am wondering exactly how a bms works ? I understand that each cell is connected individually by the 12 (in my case) wires and I think that the leds alone bleed down the voltages on the individual cells untill they are equal. I know that the mosfets are opened and closed to control access to...

It turns out the sells are ok. They are very difficult to squeeze that last bit of charge into them. I used an imax in the end. Ping is now sending a new bms as the old signalab will not allow charging. Does anyone know what goes wrong with this curcuit ? The fet seems to be working. I wonder if...

Does anyone know exactly haw to set an Imax to singularly cell charge my Ping 36v 10ah ? Its max charged voltage is 3.65 and it will charge at around 3.8v .I know how to connect to my cells through the balance wires but I can't find a correct setting for my cells and I'm confused by its menus...

Ping cells are $9.30 or £6.17 each. Its 10 A/H so 9.30 x 2 = 18.60 18.60 x4 = $ 74.40 or £49.36 + shipping but I also need a bms.

Can anyone recommend an economy single cell Charger for my Pings ? I'm in the Uk so 240v 50 hz . Or I have a PSU from a Computer to power a buck.

Thanks Guys. it looks like this battery is near end of life.Or does anyone have a donor battery in the uk and can help us? Worth a try I suppose. My friend doesn't need a full charge 6 or 7 a/h would do . One last question. Ping tell me to charge at 3.8 -3.9 v . All the single cell...

I have charged the first 4 cells at 39v as directed by Ping. I charged untill the current fell back on my power supply. It took a long time to charge each of these cells. I think they have a high resistance to charge. After resting these cells dropped back to around 3.3 v. Ping told me to use...

Ping explained the charging period for these cells. They raise to 3.2 quickly and remain around there for a long time rising slowly. After they reach 3.5 they rise quickly to 3.9 . This can take 10 hours at 1 amp for each cell. After charging each of my 4 cells for 6 or 7 hours from the 3.2...

I emailed Ping and they are helping me. Its great to have support but it takes 24hours to get replies because of time difference between uk and China. I think the battery is a Ping 3.2 . The ebike was left for over 6 months and the first 4 cell packs run the BMS (signalab).This has taken these...