@@serenemachine9110 I honestly don’t know as there are so many different types of these keybeds. a lot of them work the same with the rubber dome over the circuit board contacts but the way the plastic key is removed could be different.

@@scientist100 they really should be be unsoldered to get a correct reading.

@@mirel_lame Hi the code should be in the description under the video. I will have to try and find the schematics for you but Im not sure how to get each others email through the youtube so i can send things over.

@@electronical_matrix I look forward to seeing your video when you have made it. good luck. 🤞

@@ThomasGrillo Thanks Thomas. much appreciated.

@@electronical_matrix Arduino camera slider code /* stepper motor Rail Pan Tilt camera controller by Markus Fuller 2020 using 1 Arduino UNO 3x nema17 stepper motors and 3x EasyDrivers from www.schmalzhaus.com Library - AccelStepper by Mike McCauley: www.airspayce.com/mikem/arduino/AccelStepper/index.html */ #include <AccelStepper.h> #include <MultiStepper.h> #define PanX A0 // Pan X pin #define TiltY A1 // Tilt Y pin #define Rail A2 // Slider potentiometer #define inOutPot A3 // In and Out speed potentiometer #define PanStop 10 // to stop pan cable tangling #define Button 12 // Set Button #define EndStop 11 #define RedLED 8 // RGB Led Red #define GreenLED 9 // RGB Led Green #define blueLED 13 // RGB Led blue // Set stepper motor pins on Arduino as type, Step, and Direction, AccelStepper stepper1(1, 7, 6); AccelStepper stepper2(1, 5, 4); AccelStepper stepper3(1, 3, 2); MultiStepper StepperControl; long gotoposition[3]; // stores the A and B position for every stepper motor int PanPos = 0; int TiltYPos = 0; int RailPos = 0; int currentSpeed = 100; int inOutSpeed = 100; int XInPoint = 0; int YInPoint = 0; int ZInPoint = 0; int XOutPoint = 0; int YOutPoint = 0; int ZOutPoint = 0; int InandOut = 0; void setup() { stepper1.setMaxSpeed(3000); stepper1.setSpeed(300); stepper2.setMaxSpeed(1500); stepper2.setSpeed(75); stepper3.setMaxSpeed(1500); stepper3.setSpeed(75); pinMode(PanStop, INPUT_PULLUP); //faultstop to help prevent pan cable tangling pinMode(Button, INPUT_PULLUP); //setswitch which is also activate button pinMode(EndStop, INPUT_PULLUP); //endstop microswitch pinMode(RedLED, OUTPUT); //red led pinMode(GreenLED, OUTPUT); //green led pinMode(blueLED, OUTPUT); //blue led StepperControl.addStepper(stepper1); StepperControl.addStepper(stepper2); StepperControl.addStepper(stepper3); // Move the slider to the Home position when first turned on while (digitalRead(EndStop) != 0) { stepper1.setSpeed(1500); stepper1.runSpeed(); stepper1.setCurrentPosition(0); // When EndStop is activated this sets position as step 0 } delay(30); // Moves back slightly from the rail endstop while (stepper1.currentPosition() != -1500) { stepper1.setSpeed(-1500); stepper1.run(); // This section below for Pan centre control } // Moves the pan head anticlockwise until microswitch is activated while (digitalRead(PanStop) != 0) { stepper3.setSpeed(-400); stepper3.runSpeed(); stepper3.setCurrentPosition(0); // When Pan is centred set position to 0 steps } delay(30); // Moves pan clockwise untilfacing forward, this may need to be changed depending on how many teeth between stepper and pan wheel while (stepper3.currentPosition() != 1070) { stepper3.setSpeed(400); stepper3.run(); // End of section above digitalWrite(blueLED, HIGH); // blue led turns on } } void loop() { // this will cancel out the rail movement if you try and travel beyond safe limits while (digitalRead(EndStop) == 0 || stepper1.currentPosition() < -40500) {} if (digitalRead (Button) == 0) { delay(1000); // hold switch for 1 second to reset all values then LED turns Blue if (digitalRead (Button) == 0) { InandOut = 4; } switch (InandOut) { case 0: // Set the A position InandOut = 1; XInPoint = stepper1.currentPosition(); // Set the IN position for steppers 1 YInPoint = stepper2.currentPosition(); // Set the IN position for steppers 2 ZInPoint = stepper3.currentPosition(); // Set the IN position for steppers 3 digitalWrite(blueLED, LOW); // MSF blue led goes out digitalWrite(RedLED, HIGH); // Light up inLed break; case 1: // Set the B position InandOut = 2; XOutPoint = stepper1.currentPosition(); // Set the B positions for steppers YOutPoint = stepper2.currentPosition(); ZOutPoint = stepper3.currentPosition(); digitalWrite(RedLED, LOW); // red Led goes off then Green Led Illuminates stating ready to run digitalWrite(GreenLED, HIGH); break; case 2: // Move to A position / go to next part case 3 InandOut = 3; inOutSpeed = analogRead(inOutPot); // Place the A position into the Array gotoposition[0] = XInPoint; gotoposition[1] = YInPoint; gotoposition[2] = ZInPoint; stepper1.setMaxSpeed(inOutSpeed); stepper2.setMaxSpeed(inOutSpeed); stepper3.setMaxSpeed(inOutSpeed); StepperControl.moveTo(gotoposition); StepperControl.runSpeedToPosition(); delay(200); break; case 3: // Move to B position and returns go back to case 2 above InandOut = 2; inOutSpeed = analogRead(inOutPot); // Place the B position into the Array gotoposition[0] = XOutPoint; gotoposition[1] = YOutPoint; gotoposition[2] = ZOutPoint; stepper1.setMaxSpeed(inOutSpeed); stepper2.setMaxSpeed(inOutSpeed); stepper3.setMaxSpeed(inOutSpeed); StepperControl.moveTo(gotoposition); StepperControl.runSpeedToPosition(); delay(200); break; case 4: // If Set button is held longer than one second go back to the beginning case 0 above InandOut = 0; digitalWrite(RedLED, LOW); digitalWrite(GreenLED, LOW); digitalWrite(blueLED, HIGH); delay(1000); break; } } // PanX - Pan movement XPos PanPos = analogRead(PanX); // if Pan Pot is moved left, move stepper 2 pan anticlockwise if (PanPos > 600) { //stepper2.setSpeed(currentSpeed); PanPos = map(PanPos, 600, 1024, 0, 200); stepper2.setSpeed(PanPos); // Increase speed } // if PanPot is moved right, move stepper 2 pan clockwise else if (PanPos < 400) { //stepper2.setSpeed(-currentSpeed); PanPos = map(PanPos, 400, 0, 0, 200); stepper2.setSpeed(-PanPos); // Increase speed } // if PanPot is centred then there is no movement else { stepper2.setSpeed(0); } //Tilt Y - Tilt movement TiltYPos = analogRead(TiltY); if (TiltYPos > 600) { //stepper3.setSpeed(currentSpeed); TiltYPos = map(TiltYPos, 600, 1024, 0, 200); stepper3.setSpeed(TiltYPos); // Increase speed } else if (TiltYPos < 400) { //stepper3.setSpeed(-currentSpeed); TiltYPos = map(TiltYPos, 400, 0, 0, 200); // Try changing this to lower value to slow tilt stepper stepper3.setSpeed(-TiltYPos); // Increase speed // If TiltPot is centred then there is no movement } else { stepper3.setSpeed(0); } // RAIL potentiometer RailPos = analogRead(Rail); // If potentiometer is turned left then the Gantry moves towards the control unit if (RailPos > 600) { RailPos = map(RailPos, 600, 1024, 0, 3000); stepper1.setSpeed(-RailPos); // Increase speed } // If potentiometer is turned right then the Gantry moves away from the control unit else if (RailPos < 400 ) { RailPos = map(RailPos, 400, 0, 0, 3000); stepper1.setSpeed(RailPos); // Increase speed // If potentiometer is centred then there is no movement } else { stepper1.setSpeed(0); } // run the camera slider stepper1.runSpeed(); stepper2.runSpeed(); stepper3.runSpeed(); }

@@markusfuller thank you so much. have you a schematics ?

@@andrewverran6998 Hi Andrew. I am sorry but I have no idea or info on the Behringer Composer Pro. I do not know how to help you other than the usual dig around google for info. my apologies.

@markusfuller no worries Markus, ULI doesn't make things easy. ✌️.

In answer to your first paragraph, what you are calculating is the value of the series resistor to prevent excess current flowing through the LED. The author has said that he wanted 20mA current through the device ( this may be correct for the coloured LEDs but is far too high for the standard red ones) by subtracting the voltage needed to 'strike' the LED you arrive at the figure of voltage across the series resistor - it is this that is calculated by dividing the voltage across it by the current in the circuit. It's misleading to think of LEDs as having resistance....if you look at the way I used a rule-of-thumb to 'estimate' the value of the series resistor (in my earlier post), I ignore the LED - for supply voltages above 12v - and calculate the series resistor by using the supply voltage divided by the circuit current....this is near-enough approximation for most practical purposes - for indicator applications it's better to 'underrun' the device as it last longer....especially the earlier ones (all red!) when I worked in electronics