Endless Sphere

I have been running a full charged 15s2p 5ah battery on my Tongshen tsdz2 midrive for 1.5 years and for over 2000 miles. I also ordered an adjustable charger but it was DOA so I bought a cheap non adjustable one (63v1a) for $12. If I charge the batteries and wait a few hours the battery works fine r...

The batteries I am looking at now are 10.5" x 3.8" x 1.6" x 3.75 lbs each (I would need 2 for 52v 17.5ah) so I could put one over and the other under the downtube and still clear the fork. I could also fit them both inline on the bottom of the downtube or both stacked at the bottom of the downtube n...

Hi, I am not sure what you are looking to do? Are you looking to modify a moped so it is street legal? Every state/country/area has different laws regarding legality of conversions/etc. I would think a moped could be converted to an e-moped. I would think the best (easiest) way would be to mount an ...

I have been giving the bike some more thought. I tested it yesterday, in high gear it goes about 17-20mph on flat roads with only a very light effort on the pedals depending on battery charge. I believe I could probably ride quite a bit faster if I go back to the original 42t chainring and I replace...

Thank you for the post. I also ride with my dog and I really like the extended rack with the wheel moved further back. One of our issues is when I wear my backpack Cecil sits almost sideways because my backpack gets into his space. His box is only a few inches behind by seat. With the Envoy there is...

Thank you. I don't think it is the button since that button is also used to turn the lights off and on and that is still working. I am not sure if the usb charge issue is due to an error with the display or maybe the controller, or possibly it is a manufacturer defect. It is also possible that these...

If you cannot get the bbs02 to fit perhaps another motor will fit your bike provided that you can return your motor for a refund. I mounted a TSDZ2 to my 2017 Raleigh Kodiak 1 which has a 73mm bb. The TSDZ2 is designed for both 68 and 73mm bbs and my kit even came with mounting plate spacers to use ...

Well it has been a long time since I updated this thread. We have left the US and we are in Europe. I was able to take the bike apart and pack it into 2 standard suitcases. The (3) 5p2s 20v5ah Hercules power tool batteries went through TSA without issue (they are 90wh each so legal in cabin on airpl...

Oh there are a lot of reasons for the formed opinions, but lets stick with just one. This forum thread is for this motor. A thread was created specifically for the modified firmware, yet no one is using it. Many people have complained and then quit this forum thread and maybe even the entire forum. ...

EndlessCadence wrote: ↑

Aug 25 2018 2:02pm

Thank you for the review of the firmware mod. It is nice to see the bike is not launching with pressure on the pedals. Perhaps eventually we may try it too after it is tested a bit. I am just now seeing how the original firmware works with the 15s battery.

Well we took another ride today, I guess we started out about 61.5v with the 15s battery. It is working perfectly. I have noticed a decent increase in both speed and power over the 14s battery. This may be due to several factors though, since the 15s battery has a 2p configuration (cells rated at 20...

I used the speed sensor extension cable. I have about 2 feet of wire between the plug and the stlink. Maybe that is why mine is so flaky!

Mmm my program cable doesn't work. I get an error in ST visual programmer that it can communicate. I installed my kt-lcd3 and connected it to the 8 pin connector of the motor. Then I connected my program cable to speedsensor cable of the motor. The cable is connected as below: program_cable_wiring2...

Just removed all the limitations from the open-source firmware and I got 120 max cadence at 10s and 128 max at 14s so yes it's possible you can get to 130 with 15s ;) In both cases tge motor was at max duty cycle and it makes sense that this increases with voltage Variables changed Erps overspeed i...

Would be good if you could validate the cadence. At 112 my legs were spinning pretty fast. Can't imagine 130. Yeah I don't know. I am using tire and gear calcs to come up with that, plus whatever tire size I set in the lcd (provided that is even correct). I really need a gps but I sold it with my c...

Ok well I tried 62v. I think it bucked on me for about a second but then took off running. I made 3 runs up and down my street and then measured voltage at 61.7v so it was at 62v. It was flying however I did not have fat little Cecil in the back this time. 14mph at 62v = 130 calculated cadence. My o...

Do you know what the cadence (rpm) limit is for the original firmware for the 52v motor? I assume I must be getting close to it now. I wish I could try the 62v today but it is already dark and my 20w china charger has got another 30 mins until the battery is charged up to 62v. Maybe I will try a qui...

Thank you Jbalat. There is not much I can do at the moment though, I already sold my soldering guns. Actually you would laugh if you saw how I wired the wires inside the battery. The battery has squeeze terminals for the plus and minus connections, I just stuffed the wires in backwards through them ...

John and Cecil you should use some 12awg silicon wire and gold bullet connectors that are soldered on. Check out hobby king The wires are 14awg. You do realize that the power leads on the motor are 16awg? Thus whatever battery you plug in will be running through 16awg wires before it reaches the mo...

In case anyone is interested here is our new "dirt cheap" battery which cost $50 total for all 3 new 20v5ah Harbor Freight Hercules batteries plus some wire and connectors. I bought them on ebay when the 20% coupon was going around. Inside there are 30 (15s2p) Samsung Inr18650-25r M cells rated at 2...

Hey dude, you were interested in my 15s battery test so I have some preliminary results for you. So far it looks very promising. I rec'd my small 21v 1a charger and charged my 3 batteries individually (takes forever to charge the batteries too). I just got back from a quick test run. I tried 61.1v ...

Tsdz2 is somewhat defective, the gears do not mesh properly and the nylon drive gear often gives out prematurely. The tsdz2 is somewhat powerful if you get the 52v 750w version. The bbs02 will have more power tha the tsdz2 and can handle higher amps and it appears much more reliable but it does not ...

I agree with you on this, however with me it look like half baked product. Your valuable time and material has helped make this product great but I don't know why the manufacturer wouldn't do this in the first place or at least have some decent firmware rather than expect people to flash and do the...

I believe it does work. Currently I don't have a cadence sensor mounted but will do that soon. Does the opensource firmware display cadence as well? It feels like the motor assists easily up to around 90-100 RPM, will get back to this with real figures soon. You could be right in that I experience ...

Such disappointment. Yes, 48v controller firmware cuts battery power out at 42-43v. However that is not "half" the capacity of the battery. You are using just about all the "safe" capacity. It is not good to drain you battery below 3v per cell and it can cause it irreparable harm to do so. A 48v ba...