1. SAMI MAKERSPACE MAKE: AN ELECTRONICS WORKSHOP

2. SERVOS Precise rotations.

3. SERVOS: WHAT ARE THEY GOOD FOR? Rotating a precise amount Rotating with more power (torque) than a DC motor. Lots of different attachments.

4. LIMITATIONS Can’t make a full rotation; can only rotate about 180 degrees. Even at rest, servos use energy. They can consume a lot of current and overload an Arduino.

5. EXAMPLES Two servos for each leg; one for each axis of rotation.

6. EXAMPLES Rotational motion can be translated into linear motion.

7. EXAMPLES Servos can take a lot of current, but this Arduino is able to power two small servos.

8. HOW IT WORKS

9. THREE WIRES? RED = 5 Volts BLACK = Ground WHITE = Control from the Arduino

10. PROGRAMING THE ARDUINO Important steps: Tell your program to include pre-written functions for servos: #include Define a variable that is of the “Servo” type (in this example the name is “myservo”) Servo myservo; “Attach” the servo to a pin (similar to the “pinMode” function). In this example, the servo is connected to pin 9. This is where the third wire on the servo goes. myservo.attach(9); Write the servo to a position between 0 and 180 degrees (in this example “pos” can be any number between 0 and 180). myservo.write(pos);

11. EXAMPLE CODE: