Ordered my Magic pie KIT 17-11-2009 Netherlands

[TRK]

Place the switch in series with the diode, either side should be fine.

[Jazzjerry]

So that resistor 3-5 K does not effect the normal function of the throttle?

[Jazzjerry]

Well I just ordered a Diode.......



Since the guide does not say which Diode to get I asume a standard and mostly used diode should be fine.

So I ordered one 1N4148 for 10cents here http://www.eijlander.nl/article.php?group=2204&id=16078

Also ordered a 8 pin waterproof chasis connector and cable connector. And a piece of 8poled wire to Make the Cycle analyst completely detatchable.

The last thing I ordered is a 3.9k resistor.

So that shoeuld be it I gues.

[Bikemad]

I Think the drawing Bikemad put up is a good enough solution. The cycle analyst is better though. (But expensive) I am not sure yet How exactly I am going to do this but I will also put this in the dutch forum. www.naafmotor.nl (in Dutch)

Maybe you can look into the option Bikemad gave and also post this in the dutch forum for dutch readers to find solutions online as well..

Jerry,

There's no reason why you can't use both if you want to.
Take a look at this diagram, which should help you to visualise things more easily:




You could adjust the simple restrictor until the bike is just below the maximum legal speed and have your C/A set to limit the current to extend your battery range.
You could switch on the C/A for economy etc, and use the switch on the restrictor for a quick legal fix!
With both switched off you'll instantly have full power and maximum speed!

Alan
 

[Jazzjerry]

Thats probably an even better Idear.

Might go for that one........ Hmm have to order another switch and and a 5k variable resistor then.

Would I need a

-MINI MON0 5K AXIAL
-MINI MON0 5K
-SUPERMINI LIN MN 5K
-MINI MON0 5K
-MINI MON0 5K AX + SWT

[Jazzjerry]

I gues I will order this one a CM series 5k with 20 turns on it to have a bigger tuning resolution.

[Jazzjerry]

I think I understand you now Bikemad.

I altered the visualisation a bit more.

I am thinking of using the black wire of the cycle analyst (which is the ground wire used by the cycle analyst) to hook up to the Preset Potentiometer. This way I only have to bring the throttle signal wire to the cycle analyst and not also the ground wire from the throttle. I think I got enough room inside the cycle analyst enclosure to be able to build in the potentiometer and the 2 switches.

Do you think I would need another diode between the ground from the cycle analyst and the Preset potentiometer?

What do you think?

[Jazzjerry]

I now see I made a mistake in the prior drawing.......

It was kinda late last night 3AM ........ Carpe noctum.....
Kind of start making mistakes then and have trouble concentrating.

It should be like this new drawing.

[Jazzjerry]

When I use the ground from the cycle analyst, it would look like this.

[Bikemad]

Jerry,
The last two drawings appear to be wired the same, but unfortunately none of your three drawings will work correctly.

The preset has three contacts, all of which need to be used for it to work correctly:


Pin A connects to ground, via a switch if used (Black wire on the throttle connection)
Pin B connected to the throttle signal wire (White wire coming from the twistgrip or thumb throttle)
Pin W connects to the throttle signal connection on the controller (White wire on the black 3pin connector on the Magic Pie wiring harness)

This potentiometer (variable resistor) is being used as a simple voltage reducer.
With the dial turned fully towards Pin A 0% of the signal voltage will be sent to the controller.
With the dial turned fully towards Pin B 100% of the signal voltage will be sent to the controller.

Here's a quick example:
If the throttle device is held the fast position (100%) signal voltage is sent out from it.
If the dial is pre-set in the middle position, only 50% of the throttle signal voltage will be forwarded to the controller.
Therefore half throttle is the maximum that would be available to use.
When the switch (if fitted) is turned off, the pre-set restrictor will no longer have any effect on the throttle, which will continue to operate just as normal.
Hopefully this should make sense to you now, so long as I haven't confused you too much.

Alan
 

[TRK]

In my opinion you guys are over-engineering this.  I would just use one or the other, and since you already own a cycle-analyst, I'd go with that.  It will give you full throttle up until you reach either the maximum set speed or current, clearly the superior solution. 

[Bikemad]

In my opinion you guys are over-engineering this.  I would just use one or the other, and since you already own a cycle-analyst, I'd go with that.  It will give you full throttle up until you reach either the maximum set speed or current, clearly the superior solution. 

The whole idea of incorporating a simple restrictor was for a "quick select" legal speed option.
When you get stopped, it's no good saying, "Hang on officer, I can't remember how to set my Cycle Analyst back to the legal speed setting."

It's got to be much easier to simply flick a switch!

Alan
 

[Jazzjerry]

Yes you are wright. But there are more options open to us and why not use them.

No its not over engineering. If I use the cycle analyst for speedlimmiting, I loose the option of currentlimmiting through the cycle analyst. I had not thought about this untill Bikemad pointed this out to me.

So the soldering has to be done anyway.... The electronics are very cheap and I will do this whole building proces only once. When I start riding the bike I wont take it apart to alter things. Why not take some time and think it through a bit better so you use the capability's that you have.

The way Bikemad and I are thinking now will give me more options to start of with with just a minor alteration in the electronics setup.

[Hardcore]

yes it would

[TRK]

Right, I was thinking along the lines of only limiting both at the same time occasionally for legal requirements.  My bad, carry on!