Dog PET feeder with step motor 28BYJ-48

thingiverse

This thing was made with Tinkercad: https://www.tinkercad.com/things/drpsvhq0YkR This is a simple design of a pet feeder system using Step Motor 28BYJ-48 5VDC. It's a starting project which will be updated. You must divide this item in two parts: - Inside part which will rotate with a step motor. - Outside part with the hooper and a envelope of the inside part (to allow inside part rotating free). You can put this hooper downside a manual hooper and transform it in a automatic hooper. It will be a pleasure if this item is useful for any of you. If you made one please also post a picture of your setup with the cover. Thanks. Here you have an arduino example (with arduino mini, step motor and a clock credit to: https://www.luisllamas.es/motor-paso-paso-28byj-48-arduino-driver-uln2003/): //AJUSTES / MANUAL ADJUST const int ajustefino_cw = 10; // adjust input: one cw step const int ajustefino_ccw = 11; // adjust input: one ccw step const int alimentarmanual = 13; // manual feed //TEMPORIZADOR / TIMER include "Wire.h" include "RTClib.h" // A4 -> SDA // A5 -> SCL // RTC_DS1307 rtc; RTC_DS3231 rtc; //String daysOfTheWeek[7] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" }; //String monthsNames[12] = { "January", "February", "March", "April", "May", "June", "July","August","September","October","November","December" }; String daysOfTheWeek[7] = { "Domingo", "Lunes", "Martes", "Miercoles", "Jueves", "Viernes", "Sabado" }; String monthsNames[12] = { "Enero", "Febrero", "Marzo", "Abril", "Mayo", "Junio", "Julio","Agosto","Septiembre","Octubre","Noviembre","Diciembre" }; const int outputPin = LED_BUILTIN; bool state = false; //STEP MOTOR //----- //definicion de pins const int motorPin1 = 6; // 28BYJ48 In1 const int motorPin2 = 7; // 28BYJ48 In2 const int motorPin3 = 8; // 28BYJ48 In3 const int motorPin4 = 9; // 28BYJ48 In4 // variable definition int motorSpeed = 1200; //variable para fijar la velocidad / step motor velocity int stepCounter = 0; // contador para los pasos / step counter int stepsPerRev = 4076; // pasos para una vuelta completa / steps/turn //tablas con la secuencia de encendido (descomentar la que necesiteis) / tables with the secuence //secuencia 1-fase / 1 phase //const int numSteps = 4; //const int stepsLookup[4] = { B1000, B0100, B0010, B0001 }; //secuencia 2-fases / 2 phases //const int numSteps = 4; //const int stepsLookup[4] = { B1100, B0110, B0011, B1001 }; //secuencia media fase / Half phase const int numSteps = 8; const int stepsLookup[8] = { B1000, B1100, B0100, B0110, B0010, B0011, B0001, B1001 }; void setup() { //AJUSTE FINO / FINE ADJUST pinMode(ajustefino_cw, INPUT); pinMode(ajustefino_ccw, INPUT); pinMode(alimentarmanual, INPUT); //TEMPORIZADOR / TIMER Serial.begin(9600); delay(1000); if (!rtc.begin()) { Serial.println(F("Couldn't find RTC")); while (1); } // Si se ha perdido la corriente, fijar fecha y hora / If lose current set time and date if (rtc.lostPower()) { // Fijar a fecha y hora de compilacion rtc.adjust(DateTime(F(DATE), F(TIME))); // Fijar a fecha y hora específica. En el ejemplo, 21 de Enero de 2019 a las 03:00:00 / to set hour and date, pe 21 january 2019 // rtc.adjust(DateTime(2019, 1, 21, 3, 0, 0)); } state = false; //STEP MOTOR //declarar pines como salida / declaration of the pins pinMode(motorPin1, OUTPUT); pinMode(motorPin2, OUTPUT); pinMode(motorPin3, OUTPUT); pinMode(motorPin4, OUTPUT); } void loop() { //AJUSTE FINO / FINE ADJUST if (digitalRead(ajustefino_cw)==HIGH) pasoclockwise(); if (digitalRead(ajustefino_ccw)==HIGH) pasoanticlockwise(); // Obtener fecha actual y mostrar por Serial / obtain and serial pushish actual time and date DateTime now = rtc.now(); printDate(now); if (digitalRead(alimentarmanual)==true || (state == false && isScheduledON(now))) // Apagado y debería estar encendido / Check it if it must be on { digitalWrite(outputPin, HIGH); state = true; Serial.print("Activado"); for (int i = 0; i < stepsPerRev 0.7; i++) { clockwise(); delayMicroseconds(motorSpeed); } for (int i = 0; i < stepsPerRev 0.7; i++) { anticlockwise(); delayMicroseconds(motorSpeed); } } else if (state == true && !isScheduledON(now)) // Encendido y deberia estar apagado / Check it if it must be off { digitalWrite(outputPin, LOW); state = false; Serial.print("Desactivar"); } delay(5000); } //AJUSTE FINO / FINE ADJUST // Function to adjust a bit in ccw void pasoclockwise() { for (int i = 0; i < 100; i++) { clockwise(); delayMicroseconds(motorSpeed); } } // Function to adjust a bit in cw void pasoanticlockwise() { for (int i = 0; i < 100; i++) { anticlockwise(); delayMicroseconds(motorSpeed); } } //TEMPORIZADOR / TIMER void printDate(DateTime date) { Serial.print(date.year(), DEC); Serial.print('/'); Serial.print(date.month(), DEC); Serial.print('/'); Serial.print(date.day(), DEC); Serial.print(" ("); Serial.print(daysOfTheWeek[date.dayOfTheWeek()]); Serial.print(") "); Serial.print(date.hour(), DEC); Serial.print(':'); Serial.print(date.minute(), DEC); Serial.print(':'); Serial.print(date.second(), DEC); Serial.println(); } // Comprobar si esta programado el encendido bool isScheduledON(DateTime date) { int weekDay = date.dayOfTheWeek(); float hours = date.hour() + date.minute() / 60.0; // De 10:30 a 11:30 y de 20:15 a 23:15 bool hourCondition = (hours > 10.50 && hours < 11.50) || (hours > 20.25 && hours < 23.25); Serial.println(); // Lunes, Viernes o Domingo bool dayCondition = (weekDay == 1 || weekDay == 5 || weekDay == 0); if (hourCondition && dayCondition) { return true; } return false; } //STEP MOTOR void clockwise() { stepCounter++; if (stepCounter >= numSteps) stepCounter = 0; setOutput(stepCounter); } void anticlockwise() { stepCounter--; if (stepCounter < 0) stepCounter = numSteps - 1; setOutput(stepCounter); } void setOutput(int step) { digitalWrite(motorPin1, bitRead(stepsLookup[step], 0)); digitalWrite(motorPin2, bitRead(stepsLookup[step], 1)); digitalWrite(motorPin3, bitRead(stepsLookup[step], 2)); digitalWrite(motorPin4, bitRead(stepsLookup[step], 3)); }