Recent content by Chuechco

A seperate 12V battery needs to be recharged as well and is unnecessary weight when the lights are off. You might consider installing a DC/DC converter.

My head tube has an inner diameter of 34mm. The headset fits into it nicely. I am not an bicycle expert, but this should be the normal size for mountainbikes. I also have headway cells. However 52 cells sound like a lot. Do you have space for all them? The weight of 19kg is also to consider.

Welding looks good. What thickness and dimensions have these tubes that you use? A head tube made of CrMo steel is often 1.5mm thick. My head tube has the same thickness.

You are very talented. It took me countless hours to build my frame. You seem to be pretty fast! It is not your first project, right?

Congratulations on your successful legalisation! I am building a similar bike with 2kW of power. My plan is to use a pedal sensor instead of a throttle and switch to 250W-mode when riding in the city. Changing to 2kW requres a special procedure. Even if you get pulled over by cops, you could...

I have a thread that I haven't updated for a long time: http://endless-sphere.com/forums/viewtopic.php?f=6&t=53234 As soon as I have the bike finished, I will post pictures etc... The fork comes from a downhill bike I bought for 600€. I am using several parts of it, as they are rigid and...

Hi, I'm building a frame that looks similar to yours: http://s1.directupload.net/images/140402/twhb9mnm.jpg I made my own swingarm. The swingarm of my downhillbike did not allow the suspension to be outside the frame. Check out this thread...

Really nice build! I wonder why this thread isn't so popular. I especially like that you built your own frame. Can you give me some aspects like the total weight of the frame, the material used, tubing timensions...

I congratulate you on having it street legal soon! Can you tell some more about the way they inspected the frame? Did you have to send it away for a stiffness test?

I always read on the internet that a registration of such a vehicle is impossible in Germany. If you succeed, you will become some kind of a hero. Many will follow you, including me :D

When looking at teklektik's chart, it all becomes clear to me. There's a constant value which tells you how much temperature above ambient is generated for one watt. R(OJA). The datasheet names it thermal resistance. So for every watt the MOSfets generates ( P = Id²*Rds(on) ) the MOSfet's...

So if I understood it correctly, the difficulty is to handle the heat and to have it all compact? This still doesn't sound too difficult to solve for me. Why isn't there a switch like this on the market? The cost should be low, one IRF4110 costs like 2€ or about $2. This thread seems to be...

What is so difficult about a MOSfet master switch? Your design puts the MOSfets horizontal to the board, why not put them vertically up with a proper heatsink attached? What are the other problems that make such a MOSfet master switch difficult to built?

Will you add a schematic of this board?

One cell module looks to be 25-30mm wide, right? So for a 16s, the BMS will be more than 40cm long and the mainboard will add even more. Do you plan to put it into a bicycle frame? Whats your plan