My first attempt to write some arduino code for a simple stepper motor driver. This is used in combination with the L298 boards available from E bay for so little money that building makes no sense.<\/p>\n
Only 2 buttons were required to mover either right or left. A very simple speed control is used with a switch and 2 resistors. One could use a pot-meter instead to have it fully variable.<\/p>\n
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\/\/ Stepper motor with 4 buttons for controlling my EME dish with 2 stepper motors. <\/code><\/div>\n\/\/ It has a very simple speed control <\/code><\/div>\n\/\/ And a powersaving so that it doesnot consume too much current when not in use<\/code><\/div>\n\/\/ 18 september 2013 Geert Stams PA3CSG http:\/\/pa3csg.hoeplakee.nl<\/code><\/div>\n<\/div>\n#include <<\/code>Stepper.h<\/code>><\/code><\/div>\n<\/div>\nconst int stepsPerRevolution = 48;\u00a0 \/\/ change this to fit the number of steps per revolution<\/code><\/div>\n\/\/ for your motor<\/code><\/div>\n<\/div>\n#define CW 2 \/\/CW switch on digital pin 2<\/code><\/div>\n#define CCW 3 \/\/CCW switch on digital pin 3<\/code><\/div>\n#define UP 8 \/\/UP switch on digital pin 8<\/code><\/div>\n#define DWN 13 \/\/DWN switch on digital pin 13<\/code><\/div>\n<\/div>\n\/\/ create an instance of the stepper class, specifying<\/code><\/div>\n\/\/ the number of steps of the motor and the pins it's<\/code><\/div>\n\/\/ attached to<\/code><\/div>\n<\/div>\nStepper stepperA(stepsPerRevolution, 9, 10, 11, 12);<\/code><\/div>\nStepper stepperE(stepsPerRevolution, 4, 5, 6, 7);<\/code><\/div>\n<\/div>\nint stepCount = 0;\u00a0 \/\/ number of steps the motor has taken<\/code><\/div>\n<\/div>\nvoid setup(){<\/code><\/div>\n\u00a0\u00a0<\/code><\/div>\n\u00a0<\/code>pinMode(A0, INPUT);<\/code><\/div>\n\u00a0<\/code>pinMode(CW, INPUT);<\/code><\/div>\n\u00a0<\/code>pinMode(CCW, INPUT);<\/code><\/div>\n\u00a0<\/code>pinMode(UP, INPUT);<\/code><\/div>\n\u00a0<\/code>pinMode(DWN, INPUT);<\/code><\/div>\n\u00a0<\/code><\/div>\n\u00a0<\/code>digitalWrite(CW, 1); \/\/pullup high<\/code><\/div>\n\u00a0<\/code>digitalWrite(CCW, 1); \/\/pullup high<\/code><\/div>\n\u00a0<\/code>digitalWrite(UP, 1); \/\/pullup high<\/code><\/div>\n\u00a0<\/code>digitalWrite(DWN, 1); \/\/pullup high<\/code><\/div>\n}<\/code><\/div>\n<\/div>\nvoid loop()<\/code><\/div>\n<\/div>\n{<\/code><\/div>\n\u00a0\u00a0<\/code>delay(2);<\/code><\/div>\n\u00a0\u00a0<\/code>int sensorReading = analogRead(A0); \/\/ read the sensor value:<\/code><\/div>\n\u00a0\u00a0<\/code>int motorSpeed = map(sensorReading, 0, 1023, 0, 100); \/\/ map it to a range from 0 to 100<\/code><\/div>\n<\/div>\n\u00a0\u00a0<\/code>\/\/ the following sets the motor speed:<\/code><\/div>\n\u00a0\u00a0<\/code>if (motorSpeed > 0) <\/code><\/div>\n\u00a0\u00a0\u00a0\u00a0<\/code>stepperA.setSpeed(motorSpeed); \/\/set motorspeed for Az motor<\/code><\/div>\n\u00a0\u00a0\u00a0\u00a0<\/code>stepperE.setSpeed(motorSpeed); \/\/set motorspeed for EL motor<\/code><\/div>\n\u00a0\u00a0\u00a0\u00a0<\/code><\/div>\nif (!digitalRead(CW)) stepperA.step(10); \/\/reads button CW and moves stepperA 10 steps<\/code><\/div>\ndelay(10);<\/code><\/div>\nif (!digitalRead(CCW)) stepperA.step(-10); \/\/reads button CCW and moves stepperA 10 steps<\/code><\/div>\ndelay(10);<\/code><\/div>\n<\/div>\ndigitalWrite(9, LOW); \/\/sets pin# to LOW for current saving<\/code><\/div>\ndigitalWrite(10, LOW); \/\/sets pin# to LOW for current saving<\/code><\/div>\ndigitalWrite(11, LOW); \/\/sets pin# to LOW for current saving<\/code><\/div>\ndigitalWrite(12, LOW); \/\/sets pin# to LOW for current saving<\/code><\/div>\n<\/div>\nif (!digitalRead(UP)) stepperE.step(10); \/\/reads button UP and moves stepperE 10 steps<\/code><\/div>\ndelay(10);<\/code><\/div>\nif (!digitalRead(DWN)) stepperE.step(-10); \/\/reads button DWN and moves stepperE 10 steps<\/code><\/div>\ndelay(10);<\/code><\/div>\n<\/div>\ndigitalWrite(4, LOW); \/\/sets pin# to LOW for current saving<\/code><\/div>\ndigitalWrite(5, LOW); \/\/sets pin# to LOW for current saving<\/code><\/div>\ndigitalWrite(6, LOW); \/\/sets pin# to LOW for current saving<\/code><\/div>\ndigitalWrite(7, LOW); \/\/sets pin# to LOW for current saving<\/code><\/div>\n}<\/code><\/div>\n<\/div>\n <\/p>\n","protected":false},"excerpt":{"rendered":"