Endless Sphere

That KMC "Rust Buster" chain looks interesting; that looks perfect for your application. Zinc coating I presume?

I was going to recommend a programmable controller from West Coast Electric Cycles; but I don't see them listed on their site anymore. I would recommend just about any programmable controller that has flux weakening to allow you to gain a bit of extra top speed. Em3ev sells some very reliable progra...

Nice meter, I'm curious to see what your max current draw is on that bike with SLAs. I'm not sure what the back of the meter looks like; but liquid electrical tape might help with waterproofing it.

That looks like nice fabrication and paint skills; that bike looks better than a lot of pre-built ebikes. What kind of power are you running it at? What cells/motor/controller are you using?

I have been working on my rear seat-post rack lately. My plan is to add LED strips around it for a brake light and turn signals. The rack was cracked in a couple spots and bent from a couple wipe outs and other mishaps. I've had it repaired and added an extra solid rod of aluminum to it for strength...

20 amp draw will be very easy on an 8P pack! In that case I vote for the MJ1 cells out of the two. You will still have some room if you decide to go with a more powerful controller (let's say 60 amps peak).

Thank you! The loops you see are single links from a chain. I wrapped the links with a strip of sheet metal and spot welded the strip (with the link) to the battery tray. The fabric hook and loop is just sewed onto itself. Here is a zoomed image:

What is your intended/required continuous and peak current draw?

I managed to get some soldering done with my new Weller 25W iron. I broke my other one by snapping the tip off in the heating module... I added some jst-xm connectors to the cables and turn signals IMG_20190210_113205.jpg the flasher relay I bought was bigger than I expected but fortunately I was ab...

... I don't use the Bluetooth smart phone app with mine, but it has a lot of nice features. I just wanted to chime in on that. For someone who doesn't need the bluetooth programming function, the controllers from West Coast Electric Cycles would fit the bill nicely. They are modified sine wave as w...

zekill wrote: ↑

Feb 05 2019 1:02pm

is it correct to build two packs for example 7s4p and connect them in serial for 14s8p ?

Looks like a fun build. Two 7s4p packs connected in series would be 14s4p. A 14s8p pack split into two equal halves would be 7s8p.

I agree with dogman dan, it does sound like you are stressing the battery too much. Voltage drop will decrease your top speed. If you would like more info on batteries, here is a good guide: https://www.ebikes.ca/learn/batteries.html

I've been playing with some schematics for my lighting plans while I wait for the Chinese new year to be over... This is all in theory and not tested yet:

Welcome. I'd suggest searching the forum for terms like "go faster" or "increase speed" and you should find the info you are looking for.

Hey Dom,

congrats on getting the bike out for a test! Looks like you planned your build well. Enjoy that wheelie machine.

Yep, the bike is heavy; I'm guessing its around 85-90lbs fully loaded. I'm adding even more stuff to the bike as you can see in my to-do list; but I'm trying to do it with some better planned cable management. This Element has been great so far. It's been handling my short but aggressive commute wel...

I've striped the bike back even more now since I'm basically redoing all of my hasty wiring jobs. My goal is to clean up the cables and reduce clutter by trimming out extra lengths of cable that I don't need. On my 2wd setup; that are a lot of cables. Here is one example: My Magic Pie harness can be...

My knowledge is limited but it looks like a Kelly or Sabvaton controller. Here is a non-mobile link to the controller: https://www.aliexpress.com/item/BLDC-48V-96V-4000W-24-mosfet-sine-wave-controller-high-power-motorcycle-motor-controller-G-K161/32851906082.html If you attach the programming softwa...

Your aliexpress link isn't working for me. Also, if you can provide a screenshot of the programming software that may help.

I received some more gadgets from China over the last week: 12V Temp display that runs off of an NTC 10k thermistor. I'm loving the green. I also have a blue one on the way...: IMG_20190123_174124.jpg The switch arrieved damaged but I'm working out a refund of sorts from the seller. Luckily for me; ...

G'day and welcome. LiFePo4 cells have a maximum charge voltage of 3.65V per cell. So for your 16S pack, that would be an absolute maximum of 58.4V total (I see you have established that already). Do not charge to 58.8V, that will shorten the life of the pack. The good news is that there are many, ma...

Hi Robert, I cannot see your attached photo... my first guess is that the controller has be programmed for a 48V battery instead of a 52V battery. The 48V battery max voltage would be something around 54.6V and the 52V max voltage would be something around 58.8V. The controller is probable complaing...

Hi Clint, the hacksaw/flathead screwdriver is a good trick; but it sounds like you may need to try a screw extractor bit with some left hand drill bits. Sometimes, the left-hand drill bit is enough to spin the screw out. The challenge will be finding the correct size left hand drill bit and/or extra...

I finally managed to open up my XM-L T6 lights with the blown driver: IMG_20190120_101317.jpg IMG_20190120_104930.jpg IMG_20190120_104954.jpg I didn't realize the back would thread off like the front; so I get it with a hammer and a screwdriver. I then noticed the back began to spin. Note: this ligh...

I finally managed to open up my XM-L T6 lights with the blown driver: IMG_20190120_101317.jpg IMG_20190120_104930.jpg IMG_20190120_104954.jpg IMG_20190120_101308.jpg I didn't realize the back would thread off like the front; so I get it with a hammer and a screwdriver. I then noticed the back began ...