Where are you planning to put this diode?
You cant put it on the voltage out to the pot as then your 5V will be 4.6 or 7. You cant put it on the wiper out as you will lose .7 ov a volt. Beats me..
Yes that wiper input is just looking for a SIGNAL voltage. Nowhere near your 3A supply. Its a tiny tiny current. Into maybe a 100k input. So take the 5V and the 0V to your wigg wagg. And take the wiper out to all 4 controller in a screened cable.
As for
24v 1500watts .....don't mean squat.
It doesn't have to.
62.5 amps max draw under full load.
That's about as much as you need.
Running 4 of these motors on 1 buggy ain't ever gonna draw max current unless I put it upto a Brickhill and try and push it over.
Thats nonsense. Your 1500 watt motors will try to draw maybe 300 plus amps as you accelerate. Or if a wheel os stalled. The 1500 watts thing is nonsense. They will have an impedance around 25 to 35mOhm. Add 24V and you get 800A according to ohms law. And thats around double what a wheelhair motor draws at 24V stalled. It cannot do that only because it is limited by the max current on your controller. This reduces torque by maybe 8x due to a 100? Amp limit. So if you plan on going up anything steep, or having a sensible acceleration rate, or not having the battery voltage collapse every time you gun it then your max speed better not be high. It will work OK at maybe 8 to 12MPH. Your battery range will be dismal.
62.5 amps max draw under full load.
My RC car has a 50A limit. My RC helicopter regularly sees 125A on a rapid climb. My quadcopter sees 85A every time I accelerate upwards. 62.5? Wher are you getting this?
This is the R-Net software. LOOK at the motor current on my TWO motors, as I turn in place on a wheelchair with 2x 350 watt motors. One is over 100A the other is 114A. You are talking about 1500 watt motors. With much higher current/lower impedance. 62A??? You are on another planet.