2
SV203
- Servo Basics
RC servos operate using feedback to compare the current position
to an input pulse width, which typically repeats every 14 to 20 ms
(milliseconds). If the pulse width lasts for approximately 0.6 ms, the
servo will rotate to a maximum position. If the pulse width is
increased to approximately 2.4 ms, the servo will rotate to the
opposite maximum position (Figure 1). A 1.5 ms pulse will set the
servo in the middle (neutral) position.
The SV203 controller is designed to the specifications of a Futaba
servo model FP-S148. These servos have a neutral position at 1.52
ms. -90 degrees at 0.6 ms, and 90 degrees at 2.4 ms. Other servos
may have slightly different values for these positions.
(Figure 1 - servo timing diagram)
