Cycle Analyst controlling a 0-5K Magura throttle?

[nasukaren]

Hiya -

I just bought a Cycle Analyst and will be using it on my moped conversion. I was very interested in the current limiting / speed limiting / low-voltage detecting aspect of the C-A, but it looks like that it was designed mainly for a Hall-type throttle.

In order to take advantage of the speed limit, current limit, and low voltage cutout, the Cycle Analyst needs to be wired in such a way that the throttle-override output is able to take charge of the motor controller when one of the limits is surpassed. The output is a stiff analog voltage that can range from 5V down to 0V. When it detects that a limit is exceeded, the voltage begins to ramp down from its resting point (set by ItermMax), until power to the motor is reduced and the limit (speed, current, or voltage) is no longer exceeded.

By comparison, the user typically has a throttle signal that varies from close to 0 or 1V when it is off, up to 4-5 V when the throttle is fully engaged. For proper operation, the signal for the motor controller should be the lower of these two voltages. An easy way to achieve this is with a diode and current limiting resistor on the throttle line as shown in the following schematic:

Can anyone help me figure out how to make this work with a 0-5K pot type throttle? Is it at all doable?

Thanks in advance!


p.s. I'd ask Justin @ ebikes directly but I think he's kinda busy pedaling (or not) across Canada.

 

[fechter]

That same setup should work for a Magura in most cases.

What kind of controller are you using?

 

[nasukaren]

That same setup should work for a Magura in most cases.

What kind of controller are you using?

Fechter-san

I'm using the servo tester for my rc ESC. It has a little 5k pot in it. I think its internal voltages are 5V as that's what the BEC supplies to it. Would I connect the "to controller throttle input" line above to the wiper of the 5K pot? Or to one of its legs?

Thanks so much for your help!

Karen