Nigel.
I am trying to upgrade my turntable using similar techniques to those shown in the tread attached to your transmission of Oct 6 2021. My browser will not open the various JPG files attached to the instructions. I get a message -“This XML file does not appear to have any style information associated with it. Can you assist in proividing copies of the various JPG files or direct me to where I might obtain same
Regards, Ken

By the way , it was the Arduino, XC-4458, 5V Stepper Motor + Controller

I was hooking up to a PECO NB-55 (N-guage) table, and I ended up using a length of LEGO Technic shaft glued into the turntable rotor to make the connection possible. I see you’re in OO, so you’ll have to figure out a way to hook your table up.

//FORWARD/REVERSE Control of Stepper Motor – Rev XX
//26/3/2020 – Use Rubber coupler to motor. (StepsperRev set to 10)
//24/4/2020 – Use Lego gears to motor. (StepsperRev set to 64)
//27/04/2020 – Found a plastic shaft-coupler – Works a treat!
//26/05/2020 – Change StepsPerRev to 5

#include

// Constants used to set pin numbers:
const int CWbuttonPin = 2; // the number of the Clock-wise pushbutton pin
const int ACWbuttonPin = 3; // the number of the Anti-Clock-wise pushbutton pin

const int stepsPerRevolution = 5; // 10 – Gives ~10 degrees;64;200;change this to fit the number of steps per revolution
// for your motor

// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, 8, 10, 9, 11); //NOT 8, 9, 10, 11 as shown in examples!!!

// variables will change:
int CWbuttonState = 0; // variable for reading the pushbutton status
int ACWbuttonState = 0; // variable for reading the pushbutton status

void setup() {
// put your setup code here, to run once:
pinMode(CWbuttonPin, INPUT);
pinMode(ACWbuttonPin, INPUT);

// set the speed at 200 rpm:
myStepper.setSpeed(200); //60 initially
}

void loop() {
// Here’s the main code, to run repeatedly:

//Clockwise Push-button code
// read the state of the CWpushbutton value:
CWbuttonState = digitalRead(CWbuttonPin);

// check if the pushbutton is pressed. If it is, the buttonState is HIGH:
if (CWbuttonState == HIGH) {

myStepper.step(stepsPerRevolution);//Rotate clockwise

} else {
CWbuttonState = 0;
}

//Anti-Clockwise Push-button code
ACWbuttonState = digitalRead(ACWbuttonPin);

// check if the pushbutton is pressed. If it is, the buttonState is HIGH:
if (ACWbuttonState == HIGH) {

myStepper.step(-stepsPerRevolution);//Rotate anti-clockwise

} else {
ACWbuttonState = 0;
}

}

You’ll find the thread here:

https://www.rmweb.co.uk/community/index.php?/topic/78578-dcc-controlled-peco-turntable-project-using-a-arduino-uno/

Good luck!