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Archive for September, 2019
Posted by kevinlau | Sep 03, 2019 @ 01:04 AM | 834 Views
The servos DOMAN S2003MD and S2000MD are now available with digital position feedback without the need of additional wires.

How to

To get the current angle, send a 50us (microsecond) pulse to the servo motor. The servo will pull the control wire high after the microseconds that represent the current position. This can be done using Arduino:

pinMode(pin, OUTPUT);
digitalWrite(pin, HIGH);
delayMicroseconds(50); // send a 50 us pulse to get the current position
digitalWrite(pin, LOW);
pinMode(pin, INPUT);
int position = pulseIn(pin, HIGH); //e.g. 500-2500

Examples
Teach and Replay
Wire the servo as shown below:


01





Press enter on the serial monitor (enable Carriage return) to teach the current angle. 3 angles can be teached. Press enter to replay the angles.

Mirror movement
Wire two servos according to:



Move the servo connected to pin 9. The servo on pin 10 should follow. Open the serial plotter to view the read angle.