Replacing throttle with push button - low speed

[AbbyMoffli]

I basically want a low speed button in place of the throttle - walk mode is to awkward to access
would this circut work ?
are there better options ?

 

[harryS]

It depends on your controller's throttle threshold. I'm speaking to the max voltage. Mine will not respond if 5Volts is applied to the throttle input, but some guys say their units will.

I suggest grounding the zener and put the switch between the diode-resistor junction and the throttle input, Or just use resistor bridge with a trim pot. You might want to vary the 1.6V a bit,

 

[6zfshdb]

Your circuit may work on some 3 wire hall sensor throttles, but as @harryS says, it will depend on the controller.
In my case, I used a simple voltage divider with variable resistor to emulate the hall effect. I couldn't get it to work unless I first disconnected the throttle from the controller.

The circuit looks like this with a switch to isolate the throttle:

With the toggle switch in one position, the throttle operates normally. In the other, the variable resistor controls the speed from zero to 24 mph. I can set it to any speed I choose for walk assist, or use it as a cruise control. The advantage here is, you can adjust the walking speed for the slope or surface conditions.

No reason a push button wouldn't work instead of the toggle.