I am slowly adding my other projects. I have the layout done, it will look exactly like “My instructables” but with different projects.

For the “Top post” page, I wanted to have the most popular pages, but it does not seem to work. It gives me the lastest post… I tried using “Top Posts By Category ” by M&M but never got it to work. I then tried this other plugging “Latest Posts by Category Archive”Returns a list of your latest posts, organized by category. … humm let me read that again… I now know why it gives me the lastest post! What a failure! I will then try to get the “Top Posts By Category” working!

I am posting with w.bloggar. I can see html code when I am writting, I guest this is not a WYSIWYG editor “what you see is what you get”. I figure out how to import images… but there is no fancy editing except the html that I see here. That could be annoying when you have more then one images with different width and height.

btw, Rudy has already started the schematic of the motor controller, almost done. I might get the dev board soon!

I am also trying to get a livescribe pen, I really want one!

I just wanted to let you know where my project is going. I broke the motor of my scooter.

I tried to fix it, it did work… for 10 meters when it broke again.

What happen is that the motor lead short circuited and that made the motor heat up a lot!
The vibration of the scooter rolling around made the battery move, thus pulling on the motor driver and unconnected/shorting the motor leads!!

Here is a picture of the power consumption when I had the short circuit. Look at the current, 143Amp!!

This is the motor I might buy

http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idproduct=7071

Rated Power: 1580w
Kv: 580rpm/v
Cell count: 4~8 Lipoly

It seems to be a very good candidate for my new motor. My original motor is 380rpm/v, this mean I will go faster!
I will have to wait to got back home to machine a new shaft.

BTW, did I told you I crash with my scooter going 34km/h? I popped a wheelie at 34km/h. The throttle was too sensitive.
I coded a function that would smoothed the input read from the throttle.

On a other note, I am also thinking of getting a motor controller devboard from Microchip.
http://ww1.microchip.com/downloads/en/DeviceDoc/70331A.pdf

Since I have no experience in brushless motor controller, I guest I could start with this neat product.
I has a user interface on the computer so I can see different things about the motor in action.

The PCB looks like this:

Here is the block diagram:

Rudy is working on a Hybrid SAE formula car for is final engineering 2 years project.
http://www.formula-hybrid.org/

He his working on the electric motor drive system and I send him links to lithium battery, MIT go kart, etc. He got really interested in motor driver.
He will help me in the fabrication of the motor controller.

I am also posting this from a desktop wordpress application call Blogjet. It works nicelly for the moment. I am on the free trial. Not sure if I will buy it since there are tons of free one out there. Adding pictures to post is really easy. I will try a posting with w.bloggar too.

http://www.centernetworks.com/wordpress-desktop-blogging
http://www.iamkarthik.com/12-wordpress-editors.html

After posting, I realise that when you click on a image, it link to the the wrong images. I remove the links. We will try again.

If you want to build your own, please visit :

http://www.instructables.com/id/Solar-Powered-Battle-Symet-BEAM-Style/

Here is the embeded instructables. Have fun!

Solar Powered Battle Symet -- BEAM Style -- More DIY How To Projects

http://web.mit.edu/first/scooter/

They design and made there own 590W hub motor. Not only one motor but 2 motors! 2 wheels drive scooter!

Me and my friend Jérôme ( yes, one of my good friend is also name Jérôme and we always work together so it is Jérôme² ) are thinking/planning of making our own hub motor for a scooter.  On the BWD scooter website, there is some pretty good info and mathz equations to make your own. Worth looking into.

This is pretty darn sick! Those motors are really powerfull.

If you want to build your own wanna be miniball, please visit :

http://www.instructables.com/id/Solar-Powered-Miniball-Wannabe/

This is the first time trying to embed a instructables!

Solar Powered Miniball Wannabe -- More DIY How To Projects

Lately I have been following thread of this forum

http://endless-sphere.com/forums/index.php

This forum is a gold mine for people studying and making electric vehicule.

When searching, I found this thread
http://endless-sphere.com/forums/viewtopic.php?f=2&t=6892

and here is the specific post to download the software.
http://endless-sphere.com/forums/viewtopic.php?f=2&t=6892&start=75#p119810

You can also make some graph  that can be useful.

You can enter all your info about vehicule to get some pretty good result. It give a good idea on the speed you can achieve. I am still skeptic about the distance I can go with the scooter compare to what the simulator told me. That is something I will be testing when I get my new motor.

Member swbluto is the creator of the simulator you just saw. He is also making a electric scooter.

You can follow the thread here: http://endless-sphere.com/forums/viewtopic.php?f=12&t=7638

I had to remove the “gold connectors” from the motor to change them with blue terminal connectors.

You don’t want to cut those wires, each individual wire strand is covered with thin insulation. The insulation of each tip was remove. So if you cut the wire, you will need to remove the insulation. I recommend high power soldering iron , this  will melt the insulation. I use to take a open flame to burn the insulation… not good, the wire was black and was hard to solder.

The connectors are now crimp to the wire.

I was now ready to test my super scooter.

As we speak,  I have my controller and I soldered back the originals gold connectors.

It is so great, that I took picture just in case I wanted to build one Then I realise that I could make one using the same electric motor I have

Back in Québec, I was able to find a razor push scooter for 1.50$ and a kid bike for 1$ at garage sell! The wheel on the kid bike is around 12 inch and I was planning to make it using a small wheel. I still want something portable if I enter a city bus or something like that.

I was also able to find a electric scooter for 18$.

I bought that scooter for parts. I wanted the wheels, batteries and other stuff. The scooter was working. I was going around 10km/h ( 6mph). I little to slow.

When I was at the Maker faire 2009, I saw this guy pass me with a electric scooter. I remember seen that scooter on the internet, his personnal website http://blog.evplasmaman.com/.

I yelled  ” hey man” and he stop and we start talking. His name is Jos

He use a 3000W ( 4HP ) AXI 5345/18 GOLD LINE brushless motor.

He also use Lithium Iron phosphate (LiFePO₄ ) battery

The setup use 48 A123 cells.  4 cells in parallel and then 12 sets of those in series to make ~42Volts.

Is top speed is 20Mph. He also has a 3:1 planetary gear box. It turn out to be 4:1 with the ratio of the chain.

The gear box is from Matex gears.

You can find more picture here http://photo.gangus.com/v/Jos/scooter/ and on his personnal blog http://blog.evplasmaman.com/.

]]> http://www.jeromedemers.com/blog/2009/10/evplasmaman-scooter/feed/ 0 http://www.jeromedemers.com/blog/2009/10/my-main-power-switch/ http://www.jeromedemers.com/blog/2009/10/my-main-power-switch/#comments Sat, 03 Oct 2009 21:37:10 +0000 Jerome http://www.jeromedemers.com/blog/?p=370 I just got this nice little cut off switch. The problem I had, is not having a nice and asthetic way to power my scooter. I had some dean connectors coming out of a hole and connected those wire together. No really nice seeing wire coming out. A member of the VamUdeS told me where I could find this neat little device: http://www.rctoys.com/rc-toys-and-parts/MPI-ARMING-SWITCH/RC-PARTS-CONNECTORS-WIRING.html They use that cut off to remove power to the main motor on there plane. A very safe way to know that you motor will go turn on, when you are checking under the hood. I use this device because I could not find a normal switch that could handle 40Amp and + of power without melting.

The “real” name is Battery Arming Switch ( Safely Arm and Disarm your RC ) Product number is MAXX 6970. This will be the main “switch” to power the entire scooter. The concept is very simple, you have a little loop of wire on the end of a connector. When you plug it in the other end, it close the electric path and current can now flow to the controller and motor.

The only draw back of this cut off it the wire gauge is only 14AWG. It will work but one day I will probably need to go with 10AWG to make sure the wire will not get hot, meaning lossing precious energy in heat.