Continuous rotation Arduino speed

Projects General Guidance
1

Hello, there!
I am trying to figure out a way to program a continuous rotation Arduino to turn on and through 3 different speeds with the press of a single button (so ON/V1/V2/V3/OFF).
Is that possible with this part?

2

Finite State Machine, you seek. Good example, is here... colored LEDs it uses...

Servos are moved by changing the width of the PWM.

180 degree servos use a pulse train with 5% to 10% duty cycle at 50 kHz (50,000 pulses per second); 1ms to 2 ms (1000us to 2000us) ON, 19ms to 18ms OFF (18000us to 19000us) over 20ms (20000us)

    _                     _                    x
  _|1|_______________19.0| |___________________x   0 degrees
    ___                   ___                  x
  _|1.5|_____________18.5|   |_________________x  90 degrees
    ____                  ____                 x
  _|2.0 |____________18.0|    |________________x 180 degrees

CONTINUOUS servos use (approximately)

  • 1.5ms/18.5ms pulse to "stop" the servo
  • 1ms/19ms pulse to move counter-clockwise at maximum speed
  • 2ms/18ms pulse to move clockwise at maximum speed
3

Different speeds of servo movements is achived by sending each step at its desired step delay time.

4

50 Hz, 50 pulses per second.

1 Like
5

Are servos "modified for continuous operation" even capable of multiple speeds?

6

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