Too much information?

[maxwell]

As an engineer I don't think you can have too much information, but I think I have done it... (appologies for the camera shake)

 

[xyster]

Wow! A tech-rider's heaven on wheels for sure...
How about closeups of the display panels along with descriptions of what all these devices are monitoring?

 

[maxwell]

The speedo, standard cateye thing
Anenometer, cheepy EA-3000
GPS, Garmin NuVi 200

The controller display however is my own doing, currently showing battery current, battery AH consumed, motor temperature and battery volts. All fully programmable. With the new controller however it will change.

 

[Mathurin]

How are you measuring motor temp, and how does it work out?

 

[maxwell]

Simple, stuck a thermistor into the windings and led a couple of wires out of the motor. A look up table in (one of) the micro converts the non linear respose of the thermistor to degrees (centigrade this side of the pond).

 

[marty]

Maxwell,
You like too much information. Think I would be happy with less information. Want to see how much battery power remains and MPH. MPH is not that important because GPS tells me that.

Like the bars on your controller display. Looks like the fuel gauge on a car.

The controller display however is my own doing, currently showing battery current, battery AH consumed, motor temperature and battery volts. All fully programmable.

Please tell me more about controller display. Where do you buy this from?

 

[maxwell]

The display ia a batron one from Farnell(.com) their part 9449370. A hall sensor does the throttle position and the whole thing taks to my controller via a serial interface.

To do this I am using a PIC18F4520 on a home made PCB with all the software written in assembler.

Attached is the assembler, if you think it is too untidy feel free to tidy it up!

Renamed .doc, the forum won't allow .asm files.

 

[marty]

Maxwell,
You build the nicest looking electric bike meter I have seen. You speak a language I don't understand.
http://www.google.com and http://www.acronymfinder.com helps me figure this out.

LCD Graphic Module 128X64, Batron part # BTHQ128064AVD-COG-SRE
Hall Sensor - see picture

Serial Interface = Cable to connect to computer
PCB = Printed Circuit Board
PIC18F4520 = Microchip = Small gismo that thinks
Software = Something that smart guys write

I don't build. I buy. Does any one sell a electric bike meter that shows battery level with a bar or gauge like the fuel gauge in a car? MPH also.

 

[eP]

The display ia a batron one from Farnell(.com) their part 9449370. A hall sensor does the throttle position and the whole thing taks to my controller via a serial interface.

To do this I am using a PIC18F4520 on a home made PCB with all the software written in assembler.

Attached is the assembler, if you think it is too untidy feel free to tidy it up!

Renamed .doc, the forum won't allow .asm files.

I think we need a special topic (sticky) named Download at E-bike Technical for whole download with all references to all downloaded files/posts.

One asm file is worth more than 1000 posts of low quality theories.

Thanks maxwell

 

[maxwell]

I wonder whos therories?

I build, it is at least half the fun.

And I have no idea where you could get one of these, bespoke it would cost a fortune, say 40 hours at £30 an hour (at this rate the parts are insignificant).