Smal motor speed control



Hi,

Thank you for reading my first ever post on this forum. I am not sure if I am even on the right forum. If not, any advice on where to go would be appreciated.

I am building a half size Austin Seven car for my grandchildren. It has a 12 volt golf trolley motor to the rear axel and a battery. I have bought a motor control circuit board with a rotating-knob speed control. It has three wires to the speed control- red, black and yellow.(see photo).

I want to change the speed control to a small accelerator pedal that I have bought (see photo). This also has three wires to it - red, black and green.

As so often when one buys things on EBay from China, there are no wiring diagrams. I assumed that I could just replace the three accelerator wires for the three rotating-knob wires but this does not work - whatever combination of connections I make.

Am I doing something fundamentally wrong?

Any advice to make this work would be greatly appreciated.

Stewart

Stewart Brown : Sent from my iPhone

Have a read of this for how to post images on this forum

Firstly Stewart, Welcome ! It will in part depend on what you can see as to how easy it will be ! A potentiometer is a pot and if you can see the 3 connections then it will be easy. The middle one is the wiper and the other two are the two ends of the resistor. If the middle is right then the other two if wrong will just reverese the control and can be swapped over. The main thing is to have the right pot value and also that it is of the right type, log or lin. IF you have a multimeter then set it on resistance and check. Hope this will make sense.or come back for more Noel.

Without the pictures it's hard. to tell, but I suspect you have bought a throttle pedal based on a Hall effect device. They are used on e-bikes etc, because they are far less susceptible to dirt and wet. Red is +5v, Black is ground, and the green is a voltage signal (usually 0.8-4.8v).

Whether it works will depend on what the controller expects. If it has a 0-10v pot, then it will be incompatible, and you may have blown up the chip in the throttle pedal.