Stepper Motor Driver ULN2003 Future （步进电机驱动ULN2003的未来）.pdfVIP

Stepper Motor Driver ULN2003 Description The ULN2003A contains seven darlington transistor drivers and is somewhat like having seven TIP120 transistors all in one package. The ULN2003A can pass up to 500 mA per channel and has an internal voltage drop of about 1V when on. It also contains internal clamp diodes to dissipate voltage spikes when driving inductive loads.To control the stepper, apply voltage to each of the coils in a specific sequence. Future Electronics Egypt Ltd. (Arduino Egypt). The sequence would go like this: Here are schematics showing how to interface a unipolar stepper motor to four controller pins using a ULN2003A, and showing how to interface using four TIP120s. Arduino Example code int Pin0 = 10; int Pin1 = 11; int Pin2 = 12; int Pin3 = 13; int _step = 0; boolean dir = true;// gre void setup() { pinMode(Pin0, OUTPUT); pinMode(Pin1, OUTPUT); Future Electronics Egypt Ltd. (Arduino Egypt). pinMode(Pin2, OUTPUT); pinMode(Pin3, OUTPUT); } void loop() { switch(_step){ case 0: digitalWrite(Pin0, LOW); digitalWrite(Pin1, LOW); digitalWrite(Pin2, LOW); digitalWrite(Pin3, HIGH); break; case 1: digitalWrite(Pin0, LOW); digitalWrite(Pin1, LOW); digitalWrite(Pin2, HIGH); digitalWrite(Pin3, HIGH); break; case 2: digitalWrite(Pin0, LOW); digitalWrite(Pin1, LOW); digitalWrite(Pin2, HIGH); digitalWrite(Pin3, LOW); break; case 3: digitalWrite(Pin0, LOW); digitalWrite(Pin1, HIGH); digitalWrite(Pin2, HIGH); digitalWrite(Pin3, LOW); break; case 4: digitalWrite(Pin0, LOW); digitalWrite(Pin1, HIGH); digitalWrite(Pin2, LOW); digitalWrite(Pin3, LOW); break; case 5: digitalWrite(Pin0, HIGH); digitalWrite(P