This is another design of a fish feeder powered by arduino. The arduino uno is a separate unit from the feeder. All you need: No bearings required Print without supports at 10% infill PLA: Extruder temp at 200C and bed temp at 60CArduino code: // Speedy Auto Feeder v4 on v6 firmware int flag = 0; Servo myservo; // create servo object to control a servo int pos = 0; // variable to store the servo position void setup() { myservo.attach(9); // attaches the servo on pin 9 to the servo object myservo.write(0); // tell servo to go to position in variable 'pos' } void loop(){ // 1 myservo.write(180); // tell servo to go to position in variable 'pos' delay(1000); myservo.write(0); delay(172800000); // Wait 2 days or 172800000 ms //delay(5000); // Wait 5000 ms // 2 myservo.write(180); // tell servo to go to position in variable 'pos' delay(1000); myservo.write(0); delay(172800000); // Wait 2 days or 172800000 ms //delay(5000); // Wait 5000 ms // 3 myservo.write(180); // tell servo to go to position in variable 'pos' delay(1000); myservo.write(0); delay(172800000); // Wait 2 days or 172800000 ms //delay(5000); // Wait 5000 ms // 4 myservo.write(180); // tell servo to go to position in variable 'pos' delay(1000); myservo.write(0); delay(86400000); // Wait 1 days or 86400000 ms //delay(5000); // Wait 5000 ms }